John Spencer, M.D.
NPI 1548369937 · Family Medicine Physician · Sahuarita, AZ
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Spencer, M.D. is a Family Medicine Physician provider in Sahuarita, AZ (NPI 1548369937).
Provider details
- NPI number
- 1548369937
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD00024816 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
58 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Hemoglobin A1c Level83036 | 43 | $10 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 15 | $9 |
Typical Medicare-allowed amounts for these services range $9–$10 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 54 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 117 | 64 |
| Atorvastatin Calcium | 106 | 50 |
| Amlodipine Besylate | 87 | 47 |
| Lisinopril | 78 | 41 |
| Prednisone | 71 | 46 |
| Gabapentin | 70 | 36 |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-21
- Last updated
- 2021-01-27
- Certified
- 2021-01-27
Frequently asked questions
- What is John Spencer's NPI number?
- John Spencer's National Provider Identifier (NPI) is 1548369937, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Spencer's specialty?
- John Spencer is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Spencer located?
- John Spencer's practice location on file with NPPES is 15920 S Rancho Sahuarita Blvd Ste 120, Sahuarita, AZ 85629-8013.
- What is John Spencer's phone number?
- The practice phone number listed in the NPPES registry for John Spencer is (520) 575-1175.
- Does John Spencer accept Medicare?
- John Spencer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Spencer's NPI active?
- Yes — John Spencer's NPI (1548369937) is active in the NPPES registry as of the last update on 2021-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.