Mary Walsh, NP
NPI 1578617221 · Nurse Practitioner · Boston, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Walsh, NP is a Nurse Practitioner provider in Boston, MA (NPI 1578617221).
Provider details
- NPI number
- 1578617221
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- Yes
- License
- 138242 (MA)
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
19 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
167 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 167 | $82 |
Typical Medicare-allowed amounts for these services range $82–$82 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 51 | 26 |
| Gabapentin | 36 | 15 |
| Acyclovir | 29 | — |
| Apixabanbrand: Eliquis | 27 | 11 |
| Lenalidomide | 26 | 16 |
| Lenalidomidebrand: Revlimid | 25 | 17 |
| Abiraterone Acetate | 25 | — |
| Letrozole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-22
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mary Walsh's NPI number?
- Mary Walsh's National Provider Identifier (NPI) is 1578617221, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Walsh's specialty?
- Mary Walsh is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Walsh located?
- Mary Walsh's practice location on file with NPPES is 55 Fruit St, Boston, MA 02114-2621.
- What is Mary Walsh's phone number?
- The practice phone number listed in the NPPES registry for Mary Walsh is (617) 724-8770.
- Does Mary Walsh accept Medicare?
- Mary Walsh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Walsh's NPI active?
- Yes — Mary Walsh's NPI (1578617221) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.