DR. JOHN MCMAHON D.O.
NPI 1780842898
Emergency Medicine in Philadelphia, PA
About Dr. John Mcmahon D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN MCMAHON D.O. (NPI 1780842898) is an individual emergency medicine provider in Philadelphia, Pennsylvania, licensed in Pennsylvania (OS015565) and active in the NPI registry since May 2008. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. John Mcmahon D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show John Mcmahon reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Philadelphia, PA 19114
- Reassigned Medicare billing, Pennsylvania enrollment
- Medicare enrollment name: Aria Health Physician Services
- 490 clinicians in this Medicare group
Philadelphia, PA 19154
- Reassigned Medicare billing, Pennsylvania enrollment
- 447 clinicians in this Medicare group
Philadelphia, PA 19107
- Reassigned Medicare billing, Pennsylvania enrollment
- 241 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
PHILADELPHIA, PA 19114
PHILADELPHIA, PA 19114
PHILADELPHIA, PA 19114
PHILADELPHIA, PA 19114
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 John Mcmahon's NPI number?
The NPI number for John Mcmahon is 1780842898. It was assigned to this individual provider in the NPPES registry on May 26, 2008.
Where is John Mcmahon located?
John Mcmahon practices at 3998 Red Lion Rd, Philadelphia, PA 19114. The listed phone number is (215) 612-4963.
What is John Mcmahon's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is John Mcmahon enrolled in Medicare?
Yes. John Mcmahon is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for John Mcmahon's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Mcmahon reassigns Medicare benefits to 3 organizations: Aria Health Physicians Services - Emergency Medicine (Philadelphia, PA), Temple Physicians Inc. (Philadelphia, PA) and Jefferson Acute Care Physicians, PC (Philadelphia, PA). 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 John 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 John Mcmahon was last updated on July 18, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Dr. John Mcmahon, D.O. · NPI 1780842898
Emergency Medicine physician in Philadelphia, Pennsylvania. Individual provider, active in the CMS NPPES registry since May 26, 2008.
## Identity
- **NPI:** 1780842898 (Entity type: Individual)
- **Enumerated:** May 26, 2008
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** OS015565 (Pennsylvania)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 3998 RED LION RD, Philadelphia, PA 19114-1436
- **Phone:** (215) 612-4963
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Aria Health Physicians Services - Emergency Medicine (NPI 1053456079, Philadelphia, PA); Temple Physicians Inc. (NPI 1942351143, Philadelphia, PA); Jefferson Acute Care Physicians, PC (NPI 1730571324, Philadelphia, PA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 18, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1780842898) · Data from the CMS NPPES public registry.