Mary Masterson, P.A.
NPI 1982654893 · Physician Assistant · Baltimore, MD
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Masterson, P.A. is a Physician Assistant provider in Baltimore, MD (NPI 1982654893).
Provider details
- NPI number
- 1982654893
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.
- Sex
- Female
- Sole proprietor
- No
- License
- C01920 (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 tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
99 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 48 | $103 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 36 | $146 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 15 | $7 |
Typical Medicare-allowed amounts for these services range $7–$146 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-11
- Last updated
- 2010-10-19
Frequently asked questions
- What is Mary Masterson's NPI number?
- Mary Masterson's National Provider Identifier (NPI) is 1982654893, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Masterson's specialty?
- Mary Masterson is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Masterson located?
- Mary Masterson's practice location on file with NPPES is 4940 Eastern Ave, Baltimore, MD 21224-2735.
- What is Mary Masterson's phone number?
- The practice phone number listed in the NPPES registry for Mary Masterson is (410) 550-0350.
- Does Mary Masterson accept Medicare?
- Mary Masterson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Masterson's NPI active?
- Yes — Mary Masterson's NPI (1982654893) is active in the NPPES registry as of the last update on 2010-10-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.