Erin Williams, PA
NPI 1366822546 · Medical Physician Assistant · Saint Marys, PA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erin Williams, PA is a Medical Physician Assistant provider in Saint Marys, PA (NPI 1366822546).
Provider details
- NPI number
- 1366822546
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
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 tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
58 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) |
|---|---|---|
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 26 | $104 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 18 | $55 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 14 | $80 |
Typical Medicare-allowed amounts for these services range $55–$104 (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 · 76 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 263 | 74 |
| Lisinopril | 189 | 49 |
| Metformin Hcl | 151 | 39 |
| Levothyroxine Sodium | 139 | 38 |
| Rosuvastatin Calcium | 137 | 35 |
| Losartan Potassium | 95 | 24 |
| Alendronate Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$266 across 15 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
Mailing address
Additional practice locations (2)
- 111 Cobb StJohnsonburg, PA 15845-1209Phone: (814) 965-2857Fax: (814) 965-2523
- 177 Washington StSaint Marys, PA 15857-1349Phone: (814) 781-7531Fax: (814) 781-7494
Registry dates
- Enumerated
- 2015-06-03
- Last updated
- 2020-10-23
- Certified
- 2020-10-23
Frequently asked questions
- What is Erin Williams's NPI number?
- Erin Williams's National Provider Identifier (NPI) is 1366822546, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erin Williams's specialty?
- Erin Williams is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Erin Williams located?
- Erin Williams's practice location on file with NPPES is 761 Johnsonburg Rd, Saint Marys, PA 15857-3483.
- What is Erin Williams's phone number?
- The practice phone number listed in the NPPES registry for Erin Williams is (814) 788-8777.
- Does Erin Williams accept Medicare?
- Erin Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erin Williams's NPI active?
- Yes — Erin Williams's NPI (1366822546) is active in the NPPES registry as of the last update on 2020-10-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.