Quick answers
- Does Spencer W. Halvorson accept Medicare assignment?
- Yes. Medicare's clinician data says Spencer W. Halvorson 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 Spencer W. Halvorson see?
- In 2024, CMS data shows 24 Original Medicare patients and 29 services for Spencer W. Halvorson. This counts Original Medicare only and measures volume, not quality.
- What is Spencer W. Halvorson's NPI number?
- 1679318844. 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 Spencer W. Halvorson, 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 | 24 |
|---|---|
| Services billed to Medicare | 29 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Replacement of knee joint, both sides of knee (27447)13 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%
- Arthritis75%
- High cholesterol58%
Hospitals where Spencer W. Halvorson works
Medicare's Facility Affiliation Data lists Spencer W. Halvorson 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.
- San Juan Regional Medical Center IncFarmington, NM · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 320005
Practice locations
Addresses where Spencer W. Halvorson is enrolled with Medicare (CMS data updated October 2, 2026).
- 2300 E 30th StFarmington, NM 87401
- 2300 E 30th St, Bldg D 101Farmington, NM 87401 (505) 609‑2258
Group practices
Medicare enrollment lists Spencer W. Halvorson as a member of these groups (CMS data updated October 2, 2026).
- San Juan Regional Medical Center, Inc.241 clinicians in the group
- Orthopedic Associates PA18 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Farmington
Clinicians with the same Medicare primary specialty in Farmington, NM — not a recommendation.
Other clinicians in San Juan Regional Medical Center, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2024 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1679318844 |
| 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