Michael Mcmahon, M.D.
NPI 1316386444 · Critical Care Medicine (Internal Medicine) Physician · Bethesda, MD
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Mcmahon, M.D. is a Critical Care Medicine (Internal Medicine) Physician provider in Bethesda, MD (NPI 1316386444).
Provider details
- NPI number
- 1316386444
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD-21028 (HI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
13 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 8600 Old Georgetown RdBethesda, MD 20814-1422Phone: (301) 896-3990
Registry dates
- Enumerated
- 2013-06-21
- Last updated
- 2025-01-07
- Certified
- 2025-01-07
Frequently asked questions
- What is Michael Mcmahon's NPI number?
- Michael Mcmahon's National Provider Identifier (NPI) is 1316386444, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Mcmahon's specialty?
- Michael Mcmahon is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Mcmahon located?
- Michael Mcmahon's practice location on file with NPPES is 8901 Rockville Pike, Bethesda, MD 20889-5001.
- What is Michael Mcmahon's phone number?
- The practice phone number listed in the NPPES registry for Michael Mcmahon is (301) 433-4191.
- Does Michael Mcmahon accept Medicare?
- Michael Mcmahon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Mcmahon's NPI active?
- Yes — Michael Mcmahon's NPI (1316386444) is active in the NPPES registry as of the last update on 2025-01-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.