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DR. WILLIAM LEWIS MCMAHON MD MS
NPI 1891853420
Emergency Medicine in Suwanee, GA

Active since December 05, 2006PECOS Enrolled
4905 WINDING ROSE DR, SUWANEE, GA 30024(770) 313-2034 Get Directions Write a Review

NPPES record last updated: November 20, 2014. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. William Lewis Mcmahon Md Ms NPPES

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

DR. WILLIAM LEWIS MCMAHON MD MS (NPI 1891853420) is an individual emergency medicine provider in Suwanee, Georgia, licensed in Georgia (45885) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1891853420
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. WILLIAM LEWIS MCMAHONCredential: MD MS
Location Address4905 WINDING ROSE DRSuwanee, GA 30024-3074
Mailing Address4905 Winding Rose DrSuwanee, GA 30024-3074 · (678) 889-4880 · Fax (678) 889-4881
Phone(770) 313-2034
Sole ProprietorNo
Enumeration DateDecember 5, 2006
Last NPPES UpdateNovember 20, 2014
✔ NPI 1891853420 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in GA · 45885
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
4905 WINDING ROSE DR, Suwanee, GA 30024
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Other Identifiers 3

Medicare UPING55327GA
Medicare ID-Type Unspecified93BDNPVGA
Medicaid00809322BGA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William Lewis Mcmahon Md Ms is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignments

4

Medicare enrollment records show William Mcmahon reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The Bortolazzo Group, LLC
34 mi
Emergency Medicine
3950 AUSTELL RD
Austell, GA 30106
  • Reassigned Medicare billing, Georgia enrollment
  • 353 clinicians in this Medicare group
NPI 1801965082 (770) 732-4000
Houston County Emergency Group, LLC
104 mi
Emergency Medicine
1601 WATSON BLVD
Warner Robins, GA 31093
  • Reassigned Medicare billing, Georgia enrollment
  • 208 clinicians in this Medicare group
NPI 1013338193 (478) 922-4281
Mississippi Physicians LLP
262 mi
Emergency Medicine
611 ALCORN DR
Corinth, MS 38834
  • Reassigned Medicare billing, Mississippi enrollment
  • 71 clinicians in this Medicare group
NPI 1902174832 (662) 293-1000
Acs Primary Care Physicians - Southeast PC
303 mi
Emergency Medicine
809 82ND PKWY
Myrtle Beach, SC 29572
  • Reassigned Medicare billing, Georgia enrollment
  • 586 clinicians in this Medicare group
NPI 1861430555 (843) 692-1000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 30024 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$88.06 typical visit price
range $56.84 – $172.43
Typical copayment $22.01 (range $14.21 – $43.10)
Most-billed visit code 99203
Established Patient
$100.20 typical visit price
range $18.22 – $140.40
Typical copayment $25.05 (range $4.55 – $35.10)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 1891853420. It was assigned to this individual provider in the NPPES registry on December 5, 2006.

Where is William Mcmahon located?

William Mcmahon practices at 4905 Winding Rose Dr, Suwanee, GA 30024. The listed phone number is (770) 313-2034.

What is William Mcmahon's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is William Mcmahon enrolled in Medicare?

Yes. William Mcmahon is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for William Mcmahon's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Mcmahon reassigns Medicare benefits to 4 organizations: The Bortolazzo Group, LLC (Austell, GA), Houston County Emergency Group, LLC (Warner Robins, GA), Mississippi Physicians LLP (Corinth, MS) and Acs Primary Care Physicians - Southeast PC (Myrtle Beach, SC). Each 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.

When was this NPI record last updated?

The NPPES record for William Mcmahon was last updated on November 20, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.