What is Margaret Walker's NPI number?

Margaret Walker's National Provider Identifier (NPI) is 1821399957, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Margaret Walker's specialty?

Margaret Walker is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).

Where is Margaret Walker located?

Margaret Walker's practice location on file with NPPES is 320 E North Ave, Pittsburgh, PA 15212-4756.

What is Margaret Walker's phone number?

The practice phone number listed in the NPPES registry for Margaret Walker is (412) 359-3030.

Does Margaret Walker accept Medicare?

Margaret Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Margaret Walker's NPI active?

Yes — Margaret Walker's NPI (1821399957) is active in the NPPES registry as of the last update on 2025-01-17.

IndividualActiveAccepts Medicare

Margaret Walker, PA-C

NPI 1821399957 · Nurse Practitioner · Pittsburgh, PA

Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Margaret Walker, PA-C is a Nurse Practitioner provider in Pittsburgh, PA (NPI 1821399957).

Provider details

NPI number: 1821399957
Entity type: Individual
Primary specialty: Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Credential: PA-C
Sex: Female
Sole proprietor: No
License: C5-0012212 (DE)

Specialties & taxonomies

Nurse PractitionerPrimary363L00000XLicense C5-0012212 (DE)
Physician Assistants & Advanced Practice Nursing Providers
Medical Physician Assistant363AM0700XLicense MA055005 (PA)
Physician Assistants & Advanced Practice Nursing Providers

Profile Score

Established profile(71/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure25% of score
15 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
5 documented practice locations
Medicare service volume (vs. specialty peers)25% of score
68 Medicare services, 2024 (ranked within specialty)
Open Payments transparency10% of score
Has Open Payments disclosures (2024)

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 .

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)
Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231	37	$40
Hospital Discharge Day Management, More Than 30 Minutes99239	16	$92
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232	15	$63

Typical Medicare-allowed amounts for these services range $40–$92 (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 · 5 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Oxycodone Hcl	20	19
Atorvastatin Calcium	19	18
Amlodipine Besylate	16	16
Pantoprazole Sodium	14	14
Prednisone	14	14

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$100 across 6 records (Open Payments 2024)

Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.

Practice location

320 E North Ave

Pittsburgh, PA 15212-4756

Phone: (412) 359-3030

Street-level locationGet directions

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Mailing address