Quick answers
- Does Zachary Pfiffner accept Medicare assignment?
- Yes. Medicare's clinician data says Zachary Pfiffner 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 Zachary Pfiffner see?
- In 2024, CMS data shows 53 Original Medicare patients and 67 services for Zachary Pfiffner. This counts Original Medicare only and measures volume, not quality.
- What is Zachary Pfiffner's NPI number?
- 1538360946. 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 Zachary Pfiffner, 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 | 53 |
|---|---|
| Services billed to Medicare | 67 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)14 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 pressure75%
- High cholesterol70%
- Arthritis42%
- Anxiety34%
- Chronic kidney disease30%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)26%
Hospitals where Zachary Pfiffner works
Medicare's Facility Affiliation Data lists Zachary Pfiffner 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.
- Medical Center of the RockiesLoveland, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060119
Practice locations
Addresses where Zachary Pfiffner is enrolled with Medicare (CMS data updated October 2, 2026).
- 2500 Rocky Mountain AveLoveland, CO 80538
- 4404 Barranca Ln, Unit 101Castle Rock, CO 80104 (720) 733‑5260
Group practices
Medicare enrollment lists Zachary Pfiffner as a member of this group (CMS data updated October 2, 2026).
- Poudre Valley Medical Group LLC2,440 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Loveland
Clinicians with the same Medicare primary specialty in Loveland, CO — not a recommendation.
Other clinicians in Poudre Valley Medical Group LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538360946 |
| 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