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WILLIAM STEPHEN MCMAHON M.D.
NPI 1073558458
Pediatrics - Pediatric Cardiology in Birmingham, AL

Active since June 18, 2006PECOS EnrolledAccepts Medicare Assignment
1700 6TH AVE S, SUITE 9100, BIRMINGHAM, AL 35233(205) 934-3460(205) 975-6291 Get Directions Write a Review

NPPES record last updated: February 4, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About William Stephen Mcmahon M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM STEPHEN MCMAHON M.D. (NPI 1073558458) is an individual pediatric cardiology provider in Birmingham, Alabama, licensed in Alabama (14871) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of University Of North Carolina At Chapel Hill School Of Medicine (1988).

NPPES Registry Identity

NPI1073558458
Entity TypeIndividualMale
Primary Taxonomy2080P0202X
Provider Legal NameWILLIAM STEPHEN MCMAHONCredential: M.D.
Location Address1700 6TH AVE S, SUITE 9100Birmingham, AL 35233-1802
Mailing AddressPo Box 55823Birmingham, AL 35255-5823 · (205) 934-3460
Phone(205) 934-3460
Fax(205) 975-6291
Sole ProprietorNo
Medical School CMSUniversity Of North Carolina At Chapel Hill School Of MedicineGraduated 1988
Enumeration DateJune 18, 2006
Last NPPES UpdateFebruary 4, 2021
NPPES CertifiedFebruary 4, 2021
✔ NPI 1073558458 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric CardiologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0202X
License✔ Licensed in AL · 14871
Definition
A pediatric cardiologist provides comprehensive care to patients with cardiovascular problems. This specialist is skilled in selecting, performing and evaluating the structural and functional assessment of the heart and blood vessels, and the clinical evaluation of cardiovascular disease.
1700 6TH AVE S, Birmingham, AL 35233
Open in Google Maps ↗

Other Identifiers 2

OtherE23348Viva
Other13264AL · Healthspring

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter of Alabama, Ambetter of Tennessee and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William Stephen Mcmahon M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7517016975
PECOS Enrollment IDI20090514000466
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show William Mcmahon reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Alabama Health Services Foundation PC
Same address
Clinic/Center
1700 6TH AVE S
Birmingham, AL 35233
  • Reassigned Medicare billing, Alabama enrollment
  • 4,494 clinicians in this Medicare group
NPI 1528078219 (205) 934-3460

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DREXELL H BOGGS M.D.
Radiology (Radiation Oncology)
1700 6TH AVE S, RM: 2253
BIRMINGHAM, AL 35233
Jefferson County (205) 975-9399
MADISON THOMAS HULKER WHNP
Nurse Practitioner (Women's Health)
1700 6TH AVE S
BIRMINGHAM, AL 35233
Jefferson County (205) 934-3411
MS. JASMINE BOYKIN LPC
Counselor (Mental Health)
1700 6TH AVE S
BIRMINGHAM, AL 35233
Jefferson County (205) 529-7583
RICHARD OWN BURNEY MD
Obstetrics & Gynecology (Reproductive Endocrinology)
1700 6TH AVE S
BIRMINGHAM, AL 35233
Jefferson County (205) 996-3130
MALLORY REED LEEMAN
Registered Nurse
1700 6TH AVE S
BIRMINGHAM, AL 35233
Jefferson County (205) 934-7310
SAMUEL BENJAMIN HAYWORTH MD
Student in an Organized Health Care Education/Training Program
1700 6TH AVE S
BIRMINGHAM, AL 35233
Jefferson County (205) 934-5670
SEQUOIA ALEXUS BUCHANAN RN
Registered Nurse
1700 6TH AVE S
BIRMINGHAM, AL 35233
Jefferson County (205) 934-3411
KELSEY HALLMARK RN
Registered Nurse
1700 6TH AVE S
BIRMINGHAM, AL 35233
Jefferson County (205) 873-4277

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Mcmahon's NPI number?

The NPI number for William Mcmahon is 1073558458. It was assigned to this individual provider in the NPPES registry on June 18, 2006.

Where is William Mcmahon located?

William Mcmahon practices at 1700 6th Ave S Suite 9100, Birmingham, AL 35233. The listed phone number is (205) 934-3460.

What is William Mcmahon's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Cardiology, with taxonomy code 2080P0202X.

Is William Mcmahon enrolled in Medicare?

Yes. William Mcmahon is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for William Mcmahon's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Mcmahon reassigns Medicare benefits to University Of Alabama Health Services Foundation PC (Birmingham, AL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Mcmahon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Mcmahon accept?

Health plans from Ambetter Health, Ambetter of Alabama, Ambetter of Tennessee and Blue Cross and Blue Shield of Alabama list William Mcmahon as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for William Mcmahon was last updated on February 4, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.