Phoenix, Arizona
ADHD Assessment & Treatment in Phoenix
Comprehensive ADHD evaluation that investigates medical causes of focus issues before diagnosis
Our Approach in Phoenix
Why Focus Problems Need Medical Investigation
Many Phoenix residents struggle with focus, concentration, and productivity—and assume it must be ADHD. But research shows that 40% of "treatment-resistant" ADHD cases have undiagnosed medical conditions driving symptoms.
Before diagnosing ADHD, we investigate whether thyroid dysfunction, iron deficiency, sleep disorders, or other medical factors are causing your symptoms. Many ADHD-like symptoms overlap with anxiety and depression. Through our comprehensive psychiatric evaluation, we identify root causes. When these conditions are treated, many patients experience significant improvement—and our medication management ensures optimal outcomes.
With 19 years of ICU experience managing complex medical cases, I bring diagnostic rigor to psychiatric care. Your evaluation includes comprehensive lab work and medical assessment—not just a symptom checklist.
At a Glance
- Located in North Phoenix
- Serving Greater Phoenix Metro
- Same-week appointments
- In-person & telehealth
- Most insurance accepted
Symptoms We Evaluate
Common ADHD Symptoms in Adults
What We Investigate
Medical Conditions That Mimic ADHD
These conditions cause focus problems identical to ADHD—and won't respond to ADHD medication
Thyroid Dysfunction
Even mild hypothyroidism causes cognitive slowing, brain fog, and difficulty concentrating
Iron Deficiency
Low ferritin impairs dopamine synthesis—the same neurotransmitter targeted by ADHD medications
Sleep Disorders
Sleep apnea and insomnia create symptoms identical to ADHD
Vitamin Deficiencies
B12, folate, and vitamin D deficiencies affect cognitive function and focus
Our Process
How We Approach ADHD in Phoenix
Thorough Evaluation
75-90 minute initial assessment investigating both ADHD symptoms and potential medical causes.
Medical Investigation
Lab work to identify thyroid, iron, vitamin, and other factors that mimic or worsen ADHD.
Personalized Treatment
Treatment plan addressing root causes—whether true ADHD, medical factors, or both.
Why Phoenix Residents Choose Us
Comprehensive ADHD Care in Phoenix, Arizona
Common Questions
ADHD Evaluation FAQs for Phoenix Patients
What makes ADHD evaluation at Horizon Peak Health different from other Phoenix providers?
Unlike standard ADHD assessments that rely primarily on symptom checklists, our approach includes comprehensive lab work to identify medical conditions that mimic ADHD—such as thyroid dysfunction, iron deficiency, vitamin deficiencies, and sleep disorders. With 19 years of ICU medical experience, we bring diagnostic rigor to psychiatric care, ensuring you get the right diagnosis and treatment.
How long does an ADHD evaluation take in Phoenix?
Your initial evaluation is 75-90 minutes. This thorough assessment includes reviewing your medical history, discussing your symptoms in detail, and ordering appropriate lab work. We don't rush through appointments—complex cases require time to investigate properly.
Do you accept insurance for ADHD treatment in Phoenix?
Yes, we accept most major insurance plans including Aetna, Blue Cross Blue Shield, Cigna, and UnitedHealthcare. We recommend calling our office at (480) 535-6455 or your insurance provider to verify your specific coverage before your appointment.
Can thyroid problems cause ADHD-like symptoms?
Yes, even mild thyroid dysfunction can cause cognitive slowing, difficulty concentrating, fatigue, and brain fog—symptoms identical to ADHD. Research shows that many patients diagnosed with "treatment-resistant ADHD" actually have underlying thyroid issues. This is why we include thyroid testing in our comprehensive evaluation.
How soon can I get an ADHD evaluation appointment in Phoenix?
We offer same-week appointments for most patients. We understand that focus problems significantly impact your daily life, work, and relationships, so we prioritize getting you in quickly. Call (480) 535-6455 or use our online scheduling to book your evaluation.
Do you offer telehealth ADHD appointments for Phoenix residents?
Yes, we offer both in-person appointments at our Phoenix office and telehealth appointments for Arizona residents. Telehealth is convenient for follow-up visits, though we typically recommend in-person visits for initial evaluations to ensure comprehensive assessment.
Patient Experiences
What Our Patients Say
Perfect rating on Google
"I cannot say enough positive things about Canybec Sulayman at Horizon Peak Health. His level of medical knowledge and clinical expertise is exceptional, and the care he provides has been truly life-changing for me. I have very complex needs and he has been thorough and attentive throughout my treatment."
Lindsay C.
a week ago
"Canybec is the best NP I've been to. He really listens and gives thorough care."
Lauren A.
a week ago
"This provider has a great reputation and reported experience with patients we have referred to him! Highly recommended!"
Lisa T.
a month ago
"The best experience I have had with an NP. He has so much knowledge and his bedside manner shows he truly cares."
Kane E.
a month ago
"Good help is hard to find. And I'm incredibly grateful that I found Canybec because he's one of the best. He instills in you a curiosity about treatment so that you yourself can get a really good sense of what meds and dose are right for you. It's as engaged as I've seen any clinician. He has reached out to me outside of sessions, giving me ideas on other things that can help. I appreciate the holistic approach that he takes. Lastly, it's incredibly clear that he actually cares. If life circumstances get hard and things aren't working for you, Canybec will work with you. He tries to find creative ways to make things as cost-effective for you as possible. Can't thank him enough for all his help."
John
3 weeks ago
"I usually don't leave any reviews positive or negative. But after meeting Canybec, you feel he actually cares about his patients. He always listens to you and doesn't make you feel like he's in a hurry and wants to get to the bottom of your problems. It's like it's his mission to help you resolve all your health issues. So I felt compelled to write this review and show my appreciation. I highly recommend him to anyone that needs help, you won't be disappointed."
Francisco Y.
a week ago
"If you've struggled to find a quality provider, look no further. Canybec is easy to talk to, never feels clinical or scripted, and genuinely cares. He creates a safe, supportive space that's helped me grow and heal over the past year. He's also super up-to-date with the latest in mental health, so I feel like I'm learning something new every time we meet. Highly recommend!"
Nidia G.
4 months ago
"Just wanted to thank Canybec for help in managing my mental health needs. After an unpleasant experience with my PCP who initially managed my mental health needs, I reached out to Canybec who was very knowledgeable, patient, and empathetic. I informed him of the side effects I was having on a certain class of medications. He explored and offered different medication and treatment options - even showing latest evidence-based practice and research for each option. Thankfully, the option I've chosen has been working great for me without the major side effects and allowed me to be functional again."
Katie C.
2 months ago
"Canybec is very knowledgeable and resourceful, he actually knows what he's talking about. He makes you feel comfortable talking about your issues and helps you through them without any judgement."
Laureen C.
2 months ago
"Horizon Peak Health set a new bar for mental health care. From intake to follow-up, everything was clear, respectful, and on time. Canybec actually listened, explained options, and gave me a step-by-step plan I could follow."
Lauren A.
3 months ago
"As a healthcare professional, it is so refreshing to see a holistic approach in dealing with my ADHD. I was newly diagnosed as an adult and Horizon Peak Health has made this transition so comfortable for me. NP Canybec offers a safe space with his clinical expertise, holistic thinking, and real-world empathy. Highly, highly recommend!"
Chloe A.
4 months ago
"Canybec is excellent! He really listens and cares about what is going on. I appreciate his attentiveness and willingness to think outside the box!"
Kaela H.
2 months ago
"I drove in from Santa Clarita after coworkers kept talking up Horizon Peak Health in Rancho Palos Verdes. Six months later I'm a belt notch slimmer, skin looks brighter, and my mind feels clearer. So many compliments on my skin! Their integrative approach really works."
Susan L.
5 months ago
"I like that Canybec NP takes integrative psychiatry and assesses both psychiatry and metabolic health. Another plus is that he collaborates with the Baron clinic so if there are labs that need to be drawn etc they can do that in the same location."
Christina
11 months ago
"Ask for Canybec NP for a thorough review of your metabolic health. I was impressed with how much time he spent getting to know me as a patient. He is very passionate and very knowledgeable about helping me meet my goals."
Kenya R.
11 months ago
"What I love most is that they are upfront about everything - costs, treatment plans, medication options. No guessing game. Plus they were able to get me within a week of calling, just in time to get my new refill. Thank you!"
Abigail K.
11 months ago
"I cannot say enough positive things about Canybec Sulayman at Horizon Peak Health. His level of medical knowledge and clinical expertise is exceptional, and the care he provides has been truly life-changing for me. I have very complex needs and he has been thorough and attentive throughout my treatment."
Lindsay C.
a week ago
"Canybec is the best NP I've been to. He really listens and gives thorough care."
Lauren A.
a week ago
"This provider has a great reputation and reported experience with patients we have referred to him! Highly recommended!"
Lisa T.
a month ago
"The best experience I have had with an NP. He has so much knowledge and his bedside manner shows he truly cares."
Kane E.
a month ago
"Good help is hard to find. And I'm incredibly grateful that I found Canybec because he's one of the best. He instills in you a curiosity about treatment so that you yourself can get a really good sense of what meds and dose are right for you. It's as engaged as I've seen any clinician. He has reached out to me outside of sessions, giving me ideas on other things that can help. I appreciate the holistic approach that he takes. Lastly, it's incredibly clear that he actually cares. If life circumstances get hard and things aren't working for you, Canybec will work with you. He tries to find creative ways to make things as cost-effective for you as possible. Can't thank him enough for all his help."
John
3 weeks ago
"I usually don't leave any reviews positive or negative. But after meeting Canybec, you feel he actually cares about his patients. He always listens to you and doesn't make you feel like he's in a hurry and wants to get to the bottom of your problems. It's like it's his mission to help you resolve all your health issues. So I felt compelled to write this review and show my appreciation. I highly recommend him to anyone that needs help, you won't be disappointed."
Francisco Y.
a week ago
"If you've struggled to find a quality provider, look no further. Canybec is easy to talk to, never feels clinical or scripted, and genuinely cares. He creates a safe, supportive space that's helped me grow and heal over the past year. He's also super up-to-date with the latest in mental health, so I feel like I'm learning something new every time we meet. Highly recommend!"
Nidia G.
4 months ago
"Just wanted to thank Canybec for help in managing my mental health needs. After an unpleasant experience with my PCP who initially managed my mental health needs, I reached out to Canybec who was very knowledgeable, patient, and empathetic. I informed him of the side effects I was having on a certain class of medications. He explored and offered different medication and treatment options - even showing latest evidence-based practice and research for each option. Thankfully, the option I've chosen has been working great for me without the major side effects and allowed me to be functional again."
Katie C.
2 months ago
"Canybec is very knowledgeable and resourceful, he actually knows what he's talking about. He makes you feel comfortable talking about your issues and helps you through them without any judgement."
Laureen C.
2 months ago
"Horizon Peak Health set a new bar for mental health care. From intake to follow-up, everything was clear, respectful, and on time. Canybec actually listened, explained options, and gave me a step-by-step plan I could follow."
Lauren A.
3 months ago
"As a healthcare professional, it is so refreshing to see a holistic approach in dealing with my ADHD. I was newly diagnosed as an adult and Horizon Peak Health has made this transition so comfortable for me. NP Canybec offers a safe space with his clinical expertise, holistic thinking, and real-world empathy. Highly, highly recommend!"
Chloe A.
4 months ago
"Canybec is excellent! He really listens and cares about what is going on. I appreciate his attentiveness and willingness to think outside the box!"
Kaela H.
2 months ago
"I drove in from Santa Clarita after coworkers kept talking up Horizon Peak Health in Rancho Palos Verdes. Six months later I'm a belt notch slimmer, skin looks brighter, and my mind feels clearer. So many compliments on my skin! Their integrative approach really works."
Susan L.
5 months ago
"I like that Canybec NP takes integrative psychiatry and assesses both psychiatry and metabolic health. Another plus is that he collaborates with the Baron clinic so if there are labs that need to be drawn etc they can do that in the same location."
Christina
11 months ago
"Ask for Canybec NP for a thorough review of your metabolic health. I was impressed with how much time he spent getting to know me as a patient. He is very passionate and very knowledgeable about helping me meet my goals."
Kenya R.
11 months ago
"What I love most is that they are upfront about everything - costs, treatment plans, medication options. No guessing game. Plus they were able to get me within a week of calling, just in time to get my new refill. Thank you!"
Abigail K.
11 months ago
"What I love most is that they are upfront about everything - costs, treatment plans, medication options. No guessing game. Plus they were able to get me within a week of calling, just in time to get my new refill. Thank you!"
Abigail K.
11 months ago
"Ask for Canybec NP for a thorough review of your metabolic health. I was impressed with how much time he spent getting to know me as a patient. He is very passionate and very knowledgeable about helping me meet my goals."
Kenya R.
11 months ago
"I like that Canybec NP takes integrative psychiatry and assesses both psychiatry and metabolic health. Another plus is that he collaborates with the Baron clinic so if there are labs that need to be drawn etc they can do that in the same location."
Christina
11 months ago
"I drove in from Santa Clarita after coworkers kept talking up Horizon Peak Health in Rancho Palos Verdes. Six months later I'm a belt notch slimmer, skin looks brighter, and my mind feels clearer. So many compliments on my skin! Their integrative approach really works."
Susan L.
5 months ago
"Canybec is excellent! He really listens and cares about what is going on. I appreciate his attentiveness and willingness to think outside the box!"
Kaela H.
2 months ago
"As a healthcare professional, it is so refreshing to see a holistic approach in dealing with my ADHD. I was newly diagnosed as an adult and Horizon Peak Health has made this transition so comfortable for me. NP Canybec offers a safe space with his clinical expertise, holistic thinking, and real-world empathy. Highly, highly recommend!"
Chloe A.
4 months ago
"Horizon Peak Health set a new bar for mental health care. From intake to follow-up, everything was clear, respectful, and on time. Canybec actually listened, explained options, and gave me a step-by-step plan I could follow."
Lauren A.
3 months ago
"Canybec is very knowledgeable and resourceful, he actually knows what he's talking about. He makes you feel comfortable talking about your issues and helps you through them without any judgement."
Laureen C.
2 months ago
"Just wanted to thank Canybec for help in managing my mental health needs. After an unpleasant experience with my PCP who initially managed my mental health needs, I reached out to Canybec who was very knowledgeable, patient, and empathetic. I informed him of the side effects I was having on a certain class of medications. He explored and offered different medication and treatment options - even showing latest evidence-based practice and research for each option. Thankfully, the option I've chosen has been working great for me without the major side effects and allowed me to be functional again."
Katie C.
2 months ago
"If you've struggled to find a quality provider, look no further. Canybec is easy to talk to, never feels clinical or scripted, and genuinely cares. He creates a safe, supportive space that's helped me grow and heal over the past year. He's also super up-to-date with the latest in mental health, so I feel like I'm learning something new every time we meet. Highly recommend!"
Nidia G.
4 months ago
"I usually don't leave any reviews positive or negative. But after meeting Canybec, you feel he actually cares about his patients. He always listens to you and doesn't make you feel like he's in a hurry and wants to get to the bottom of your problems. It's like it's his mission to help you resolve all your health issues. So I felt compelled to write this review and show my appreciation. I highly recommend him to anyone that needs help, you won't be disappointed."
Francisco Y.
a week ago
"Good help is hard to find. And I'm incredibly grateful that I found Canybec because he's one of the best. He instills in you a curiosity about treatment so that you yourself can get a really good sense of what meds and dose are right for you. It's as engaged as I've seen any clinician. He has reached out to me outside of sessions, giving me ideas on other things that can help. I appreciate the holistic approach that he takes. Lastly, it's incredibly clear that he actually cares. If life circumstances get hard and things aren't working for you, Canybec will work with you. He tries to find creative ways to make things as cost-effective for you as possible. Can't thank him enough for all his help."
John
3 weeks ago
"The best experience I have had with an NP. He has so much knowledge and his bedside manner shows he truly cares."
Kane E.
a month ago
"This provider has a great reputation and reported experience with patients we have referred to him! Highly recommended!"
Lisa T.
a month ago
"Canybec is the best NP I've been to. He really listens and gives thorough care."
Lauren A.
a week ago
"I cannot say enough positive things about Canybec Sulayman at Horizon Peak Health. His level of medical knowledge and clinical expertise is exceptional, and the care he provides has been truly life-changing for me. I have very complex needs and he has been thorough and attentive throughout my treatment."
Lindsay C.
a week ago
"What I love most is that they are upfront about everything - costs, treatment plans, medication options. No guessing game. Plus they were able to get me within a week of calling, just in time to get my new refill. Thank you!"
Abigail K.
11 months ago
"Ask for Canybec NP for a thorough review of your metabolic health. I was impressed with how much time he spent getting to know me as a patient. He is very passionate and very knowledgeable about helping me meet my goals."
Kenya R.
11 months ago
"I like that Canybec NP takes integrative psychiatry and assesses both psychiatry and metabolic health. Another plus is that he collaborates with the Baron clinic so if there are labs that need to be drawn etc they can do that in the same location."
Christina
11 months ago
"I drove in from Santa Clarita after coworkers kept talking up Horizon Peak Health in Rancho Palos Verdes. Six months later I'm a belt notch slimmer, skin looks brighter, and my mind feels clearer. So many compliments on my skin! Their integrative approach really works."
Susan L.
5 months ago
"Canybec is excellent! He really listens and cares about what is going on. I appreciate his attentiveness and willingness to think outside the box!"
Kaela H.
2 months ago
"As a healthcare professional, it is so refreshing to see a holistic approach in dealing with my ADHD. I was newly diagnosed as an adult and Horizon Peak Health has made this transition so comfortable for me. NP Canybec offers a safe space with his clinical expertise, holistic thinking, and real-world empathy. Highly, highly recommend!"
Chloe A.
4 months ago
"Horizon Peak Health set a new bar for mental health care. From intake to follow-up, everything was clear, respectful, and on time. Canybec actually listened, explained options, and gave me a step-by-step plan I could follow."
Lauren A.
3 months ago
"Canybec is very knowledgeable and resourceful, he actually knows what he's talking about. He makes you feel comfortable talking about your issues and helps you through them without any judgement."
Laureen C.
2 months ago
"Just wanted to thank Canybec for help in managing my mental health needs. After an unpleasant experience with my PCP who initially managed my mental health needs, I reached out to Canybec who was very knowledgeable, patient, and empathetic. I informed him of the side effects I was having on a certain class of medications. He explored and offered different medication and treatment options - even showing latest evidence-based practice and research for each option. Thankfully, the option I've chosen has been working great for me without the major side effects and allowed me to be functional again."
Katie C.
2 months ago
"If you've struggled to find a quality provider, look no further. Canybec is easy to talk to, never feels clinical or scripted, and genuinely cares. He creates a safe, supportive space that's helped me grow and heal over the past year. He's also super up-to-date with the latest in mental health, so I feel like I'm learning something new every time we meet. Highly recommend!"
Nidia G.
4 months ago
"I usually don't leave any reviews positive or negative. But after meeting Canybec, you feel he actually cares about his patients. He always listens to you and doesn't make you feel like he's in a hurry and wants to get to the bottom of your problems. It's like it's his mission to help you resolve all your health issues. So I felt compelled to write this review and show my appreciation. I highly recommend him to anyone that needs help, you won't be disappointed."
Francisco Y.
a week ago
"Good help is hard to find. And I'm incredibly grateful that I found Canybec because he's one of the best. He instills in you a curiosity about treatment so that you yourself can get a really good sense of what meds and dose are right for you. It's as engaged as I've seen any clinician. He has reached out to me outside of sessions, giving me ideas on other things that can help. I appreciate the holistic approach that he takes. Lastly, it's incredibly clear that he actually cares. If life circumstances get hard and things aren't working for you, Canybec will work with you. He tries to find creative ways to make things as cost-effective for you as possible. Can't thank him enough for all his help."
John
3 weeks ago
"The best experience I have had with an NP. He has so much knowledge and his bedside manner shows he truly cares."
Kane E.
a month ago
"This provider has a great reputation and reported experience with patients we have referred to him! Highly recommended!"
Lisa T.
a month ago
"Canybec is the best NP I've been to. He really listens and gives thorough care."
Lauren A.
a week ago
"I cannot say enough positive things about Canybec Sulayman at Horizon Peak Health. His level of medical knowledge and clinical expertise is exceptional, and the care he provides has been truly life-changing for me. I have very complex needs and he has been thorough and attentive throughout my treatment."
Lindsay C.
a week ago
Visit Us
Our Phoenix Location
Horizon Peak Health - Phoenix
16601 N 40th St #216
Phoenix, AZ 85032
Phone
(480) 535-6455Hours
Monday – Friday: 9:00 AM – 5:00 PM
Saturday – Sunday: Closed
Also serving:
Scottsdale • Paradise Valley • Glendale • Tempe • Mesa • Peoria • Cave Creek
Directions from Major Landmarks
Paradise Valley Mall
Head north on 40th St, office is in the medical complex on the left past Greenway Rd.
Phoenix Sky Harbor International Airport
Take AZ-51 N to Bell Rd, head east to 40th St, then south. Office is on the right.
Scottsdale Fashion Square
Take Camelback Rd west to 40th St, head north. Office is past the Greenway intersection.
Mayo Clinic Phoenix
Head south on 56th St to Shea, west to 40th St, then south. Office is in the north Phoenix medical corridor.
Other Mental Health Services in Phoenix
Comprehensive psychiatric care at our Phoenix office
Other Locations
We also serve patients at these locations
Ready for Comprehensive ADHD Evaluation in Phoenix?
Same-week appointments available. Most major insurance accepted.
Schedule Your Evaluation