Erin Williams
NPI 1538821582 · Orthopedic Physical Therapist · Missoula, MT
Enrolled with Medicare as Practitioner - Physical Therapist in Private Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erin Williams is a Orthopedic Physical Therapist provider in Missoula, MT (NPI 1538821582).
Provider details
- NPI number
- 1538821582
- Entity type
- Individual
- Primary specialty
- Orthopedic Physical TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- PTP-PT-LIC-21842 (MT)
Specialties & taxonomies
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
4 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
299 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) |
|---|---|---|
| Therapy Procedure to Re-Educate Brain-To-Nerve-To-Muscle Function, Each 15 Minutes97112 | 186 | $26 |
| Therapy Procedure Using Functional Activities97530 | 113 | $35 |
Typical Medicare-allowed amounts for these services range $26–$35 (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
- 2021-10-07
- Last updated
- 2025-10-19
- Certified
- 2025-10-19
Frequently asked questions
- What is Erin Williams's NPI number?
- Erin Williams's National Provider Identifier (NPI) is 1538821582, 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 Orthopedic Physical Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is Erin Williams located?
- Erin Williams's practice location on file with NPPES is 214 E Main St, Missoula, MT 59802-4418.
- What is Erin Williams's phone number?
- The practice phone number listed in the NPPES registry for Erin Williams is (406) 926-2150.
- 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 (1538821582) is active in the NPPES registry as of the last update on 2025-10-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.