Quick answers
- Does Lynn Y. Clewley accept Medicare assignment?
- Yes. Medicare's clinician data says Lynn Y. Clewley accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Lynn Y. Clewley see?
- In 2024, CMS data shows 265 Original Medicare patients and 610 services for Lynn Y. Clewley. This counts Original Medicare only and measures volume, not quality.
- What is Lynn Y. Clewley's NPI number?
- 1598110561. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Lynn Y. Clewley, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 265 |
|---|---|
| Services billed to Medicare | 610 |
| Different services or procedures | 94 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)95 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)52 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)43 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)39 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)29 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure72%
- High cholesterol60%
- Arthritis46%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)36%
- Depression34%
- Diabetes29%
Hospitals where Lynn Y. Clewley works
Medicare's Facility Affiliation Data lists Lynn Y. Clewley at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Billings Clinic HospitalBillings, MT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 270004
- Washakie Medical CenterWorland, WY · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 531306
Practice locations
Addresses where Lynn Y. Clewley is enrolled with Medicare (CMS data updated October 2, 2026).
- 801 N 29th StBillings, MT 59101 (406) 238‑2500
Group practices
Medicare enrollment lists Lynn Y. Clewley as a member of this group (CMS data updated October 2, 2026).
- Billings Clinic Specialty Supplies and Services, LLC824 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Billings
Clinicians with the same Medicare primary specialty in Billings, MT — not a recommendation.
Other clinicians in Billings Clinic Specialty Supplies and Services, LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Utah School Of Medicine |
| Graduation year | 2016 (10 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1598110561 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians