Kathryn Williams, MD
NPI 1952857385 · Family Medicine Physician · Lewistown, MT
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathryn Williams, MD is a Family Medicine Physician provider in Lewistown, MT (NPI 1952857385).
Provider details
- NPI number
- 1952857385
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MED-PHYS-LIC-78141 (MT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
76 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 39 | $76 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 24 | $79 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 13 | $127 |
Typical Medicare-allowed amounts for these services range $76–$127 (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 · 44 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 79 | 15 |
| Amlodipine Besylate | 68 | 17 |
| Losartan Potassium | 61 | 14 |
| Atorvastatin Calcium | 60 | 16 |
| Potassium Chloride | 54 | 14 |
| Metoprolol Succinate | 43 | — |
| Lisinopril |
Practice location
Mailing address
Additional practice locations (3)
- 400 E 3rd StDuluth, MN 55805Phone: (218) 786-8364
- 401 Railroad St WMissoula, MT 59802-4109Phone: (406) 258-4789Fax: (406) 258-4732
- 401 Railroad St WMissoula, MT 59802-4109Phone: (406) 258-4789Fax: (406) 258-4732
Registry dates
- Enumerated
- 2016-08-26
- Last updated
- 2025-12-30
- Certified
- 2025-12-30
Frequently asked questions
- What is Kathryn Williams's NPI number?
- Kathryn Williams's National Provider Identifier (NPI) is 1952857385, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathryn Williams's specialty?
- Kathryn Williams is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kathryn Williams located?
- Kathryn Williams's practice location on file with NPPES is 311 W Main St, Lewistown, MT 59457-2760.
- What is Kathryn Williams's phone number?
- The practice phone number listed in the NPPES registry for Kathryn Williams is (406) 535-6545.
- Does Kathryn Williams accept Medicare?
- Kathryn Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathryn Williams's NPI active?
- Yes — Kathryn Williams's NPI (1952857385) is active in the NPPES registry as of the last update on 2025-12-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.