Alan Gruenefeldt, MD
NPI 1780795930 · Family Medicine Physician · Auburn, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alan Gruenefeldt, MD is a Family Medicine Physician provider in Auburn, CA (NPI 1780795930).
Provider details
- NPI number
- 1780795930
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G69052 (CA)
Specialties & taxonomies
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
60 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 | 33 | $10 |
| Testing for Presence of Drug, Read By Direct Observation80305 | 27 | $12 |
Typical Medicare-allowed amounts for these services range $10–$12 (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 · 78 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 192 | 106 |
| Losartan Potassium | 162 | 77 |
| Levothyroxine Sodium | 139 | 71 |
| Sertraline Hcl | 132 | 45 |
| Gabapentin | 118 | 47 |
| Amlodipine Besylate | 109 | 50 |
| Lisinopril |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-31
- Last updated
- 2023-10-04
- Certified
- 2023-10-04
Frequently asked questions
- What is Alan Gruenefeldt's NPI number?
- Alan Gruenefeldt's National Provider Identifier (NPI) is 1780795930, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alan Gruenefeldt's specialty?
- Alan Gruenefeldt is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alan Gruenefeldt located?
- Alan Gruenefeldt's practice location on file with NPPES is 404 Auburn Folsom Rd, Auburn, CA 95603-5515.
- What is Alan Gruenefeldt's phone number?
- The practice phone number listed in the NPPES registry for Alan Gruenefeldt is (530) 885-6221.
- Does Alan Gruenefeldt accept Medicare?
- Alan Gruenefeldt is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alan Gruenefeldt's NPI active?
- Yes — Alan Gruenefeldt's NPI (1780795930) is active in the NPPES registry as of the last update on 2023-10-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.