Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John A.h. Clark, MD

Individual provider Internal Medicine Physician · NPI 1578631784

John A.h. Clark, MD is a Nephrology in Huntsville, Alabama. Graduated from University of Alabama School of Medicine in 2002, 24 years ago. Practices with North Alabama Vascular and Dialysis Access Care LLC, a 4-clinician group and accepts Medicare assignment. Licensed in Tennessee.

Years since qualifying
24
Trained at
University of Alabama School of Medicine
Licensed in
TN
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2780 Bob Wallace Ave
Huntsville, AL 35805-4104
Phone: (256) 533-4626
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence MD0000040647 (TN)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD0000040647 (TN)

Record details

NPI number1578631784
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedDecember 4, 2006
Last updated in NPPESApril 21, 2026
Certification dateApril 21, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEPHROLOGY
Medical schoolUNIVERSITY OF ALABAMA SCHOOL OF MEDICINE
Graduated 2002 (24 years in practice)
Group practice North Alabama Vascular And Dialysis Access Care Llc — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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