Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

William Stephen McMahon, MD

Individual provider Pediatric Cardiology Physician · NPI 1073558458

William Stephen McMahon, MD practises Pediatric Medicine in Birmingham, Alabama. Graduated from University of North Carolina at Chapel Hill School of Medicine in 1988, 38 years ago. Practices with University of Alabama Health Services Foundation, PC, a 2,759-clinician group and accepts Medicare assignment. Licensed in Alabama.

Years since qualifying
38
Trained at
University of North Carolina at Chapel Hill School of Medicine
Licensed in
AL
In the registry since
2006
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

1700 6th Ave S Ste 9100
Birmingham, AL 35233-1802
Phone: (205) 934-3460
Fax: (205) 975-6291
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Cardiology Physician (primary) Taxonomy 2080P0202X · Licence 14871 (AL)

Record details

NPI number1073558458
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 18, 2006
Last updated in NPPESFebruary 4, 2021
Certification dateFebruary 4, 2021

Medicare enrollment

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

Medicare specialtyPEDIATRIC MEDICINE
Medical schoolUNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL SCHOOL OF MEDICINE
Graduated 1988 (38 years in practice)
Group practice University Of Alabama Health Services Foundation, Pc — 2759 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Travel and Lodging $846 6 payments · travel or lodging paid or reimbursed, such as to attend a conference
Food and Beverage $788 12 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Colleagues at University of Alabama Health Services Foundation, PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2759 clinicians in the practice; 12 are shown here.

Other providers in Birmingham