Quick answers
- Does Sara L. Hartsaw accept Medicare assignment?
- Yes. Medicare's clinician data says Sara L. Hartsaw 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 Sara L. Hartsaw see?
- In 2024, CMS data shows 191 Original Medicare patients and 461 services for Sara L. Hartsaw. This counts Original Medicare only and measures volume, not quality.
- What is Sara L. Hartsaw's NPI number?
- 1881691905. 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 Sara L. Hartsaw, 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 | 191 |
|---|---|
| Services billed to Medicare | 461 |
| Different services or procedures | 66 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)70 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)60 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)40 services
- Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)30 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)28 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 cholesterol75%
- High blood pressure64%
- Arthritis52%
- Ischemic heart disease34%
- Diabetes30%
- Anxiety21%
Hospitals where Sara L. Hartsaw works
Medicare's Facility Affiliation Data lists Sara L. Hartsaw 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.
- Campbell County HealthGillette, WY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 530002
Practice locations
Addresses where Sara L. Hartsaw is enrolled with Medicare (CMS data updated October 2, 2026).
- 3100 W Lakeway Rd, Suite 1Gillette, WY 82718 (307) 682‑7555
Specialties
- General Surgeryprimary
- Thoracic Surgeryalso
Other general surgeons in Gillette
Clinicians with the same Medicare primary specialty in Gillette, WY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Creighton University School Of Medicine |
| Graduation year | 1985 (41 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881691905 |
| 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