Quick answers
- Does Zach D. Hartman accept Medicare assignment?
- Yes. Medicare's clinician data says Zach D. Hartman 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 Zach D. Hartman see?
- In 2024, CMS data shows 223 Original Medicare patients and 436 services for Zach D. Hartman. This counts Original Medicare only and measures volume, not quality.
- What is Zach D. Hartman's NPI number?
- 1528358173. 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 Zach D. Hartman, 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 | 223 |
|---|---|
| Services billed to Medicare | 436 |
| Different services or procedures | 87 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk (G0121)44 services
- Biopsy of large bowel using a flexible endoscope (45380)34 services
- Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes (99221)34 services
- Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)29 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)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 cholesterol64%
- High blood pressure56%
- Arthritis39%
- Ischemic heart disease22%
- Anxiety22%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)22%
Hospitals where Zach D. Hartman works
Medicare's Facility Affiliation Data lists Zach D. Hartman 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.
- Aspen Valley Hospital DistrictAspen, CO · Critical Access Hospital · Emergency services: listed by Medicare · CCN 061324
- St Anthony Summit Medical CenterFrisco, CO · Acute Care Hospital · Emergency services: listed by Medicare · CCN 060118
- St Vincent General Hospital DistrictLeadville, CO · Critical Access Hospital · Emergency services: listed by Medicare · CCN 061319
- UCHealth Yampa Valley Medical CenterSteamboat Springs, CO · Acute Care Hospital · Emergency services: listed by Medicare · CCN 060049
- Valley View Hospital AssociationGlenwood Springs, CO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 060075
Practice locations
Addresses where Zach D. Hartman is enrolled with Medicare (CMS data updated October 2, 2026).
- 401 Castle Creek RdAspen, CO 81611 (970) 925‑1120
- 816 W 4th StLeadville, CO 80461 (719) 221‑0660
- 940 Central Park Dr, Suite 200Steamboat Spr, CO 80487 (970) 879‑9299
Group practices
Medicare enrollment lists Zach D. Hartman as a member of these groups (CMS data updated October 2, 2026).
- Aspen Valley Hospital District38 clinicians in the group
- St. Vincent General Hospital District15 clinicians in the group
- Alpine Surgical Associates PC2 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Colorado
Clinicians with the same Medicare primary specialty in Colorado — not a recommendation.
Other clinicians in Aspen Valley Hospital District
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2012 (14 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1528358173 |
| 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