William Macdonnell, P.A.
NPI 1225086994 · Physician Assistant · Baltimore, MD
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Macdonnell, P.A. is a Physician Assistant provider in Baltimore, MD (NPI 1225086994).
Provider details
- NPI number
- 1225086994
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.
- Sex
- Male
- Sole proprietor
- No
- License
- C0002492 (MD)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2006-05-05
- Last updated
- 2023-03-13
- Certified
- 2023-03-13
Frequently asked questions
- What is William Macdonnell's NPI number?
- William Macdonnell's National Provider Identifier (NPI) is 1225086994, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Macdonnell's specialty?
- William Macdonnell is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Macdonnell located?
- William Macdonnell's practice location on file with NPPES is 1501 W Mount Royal Ave, Baltimore, MD 21217-4289.
- What is William Macdonnell's phone number?
- The practice phone number listed in the NPPES registry for William Macdonnell is (410) 225-4118.
- Does William Macdonnell accept Medicare?
- William Macdonnell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Macdonnell's NPI active?
- Yes — William Macdonnell's NPI (1225086994) is active in the NPPES registry as of the last update on 2023-03-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.