Quick answers
- Does Spencer R. Anderson accept Medicare assignment?
- Yes. Medicare's clinician data says Spencer R. Anderson 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 R. Anderson see?
- In 2024, CMS data shows 185 Original Medicare patients and 215 services for Spencer R. Anderson. This counts Original Medicare only and measures volume, not quality.
- What is Spencer R. Anderson's NPI number?
- 1720252158. 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 R. Anderson, 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 | 185 |
|---|---|
| Services billed to Medicare | 215 |
| Different services or procedures | 21 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Emergency department visit with low level of medical decision making (99283)91 services
- Emergency department visit with moderate level of medical decision making (99284)52 services
- Emergency department visit with high level of medical decision making (99285)29 services
- Emergency department visit with straightforward medical decision making (99282)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 pressure71%
- High cholesterol58%
- Arthritis51%
- Diabetes39%
- Ischemic heart disease26%
- Chronic kidney disease25%
Hospitals where Spencer R. Anderson works
Medicare's Facility Affiliation Data lists Spencer R. Anderson 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.
- Cibola General HospitalGrants, NM · Critical Access Hospital · Emergency services: listed by Medicare · CCN 321308
- Flagstaff Medical CenterFlagstaff, AZ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 030023
- Tuba City Regional Health Care CorporationTuba City, AZ · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 030073
Practice locations
Addresses where Spencer R. Anderson is enrolled with Medicare (CMS data updated October 2, 2026).
- 1016 E Rooselvelt AveGrants, NM 87020 (505) 287‑4446
- 167 N Main St, Tuba City Indian Medical CenterTuba City, AZ 86045 (928) 283‑2094
- 42121 US Hwy 70Portales, NM 88130 (575) 359‑1800
Group practices
Medicare enrollment lists Spencer R. Anderson as a member of these groups (CMS data updated October 2, 2026).
- Tuba City Regional Health Care Corporation163 clinicians in the group
- Fedko Emergency Physicians New Mexico, LLC54 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Grants
Clinicians with the same Medicare primary specialty in Grants, NM — not a recommendation.
Other clinicians in Tuba City Regional Health Care Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Arizona College Of Medicine |
| Graduation year | 2008 (18 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720252158 |
| 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