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Diana Mcmahon, MD
NPI 1821928045 · Psychiatry Physician · Philadelphia, PA
Diana Mcmahon, MD is a Psychiatry Physician provider in Philadelphia, PA (NPI 1821928045).
Provider details
- NPI number
- 1821928045
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- MT236449 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Established profile(58/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in 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
100 E Lehigh Ave
Philadelphia, PA 19125-1012
Phone: (215) 707-1200
Street-level locationGet directions
Mailing address
5030 Commonwealth St
Detroit, MI 48208-2040
Additional practice locations (1)
- 3401 N Broad StPhiladelphia, PA 19140-5103Phone: (800) 836-7536
Registry dates
- Enumerated
- 2026-05-20
- Last updated
- 2026-05-20
- Certified
- 2026-05-12
Frequently asked questions
- What is Diana Mcmahon's NPI number?
- Diana Mcmahon's National Provider Identifier (NPI) is 1821928045, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Mcmahon's specialty?
- Diana Mcmahon is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Diana Mcmahon located?
- Diana Mcmahon's practice location on file with NPPES is 100 E Lehigh Ave, Philadelphia, PA 19125-1012.
- What is Diana Mcmahon's phone number?
- The practice phone number listed in the NPPES registry for Diana Mcmahon is (215) 707-1200.
- Is Diana Mcmahon's NPI active?
- Yes — Diana Mcmahon's NPI (1821928045) is active in the NPPES registry as of the last update on 2026-05-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.