Hans Gruenn, M.D.
NPI 1649398371 · Family Medicine Physician · Ojai, CA
Hans Gruenn, M.D. is a Family Medicine Physician provider in Ojai, CA (NPI 1649398371).
Provider details
- NPI number
- 1649398371
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A51484 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 66 | 15 |
| Rosuvastatin Calcium | 45 | — |
| Trazodone Hcl | 39 | 11 |
| Valacyclovir Hclbrand: Valacyclovir | 29 | — |
| Amlodipine Besylate | 27 | — |
| Estradiolbrand: Dotti | 24 | — |
| Lorazepam |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-27
- Last updated
- 2020-11-17
- Certified
- 2020-11-13
Frequently asked questions
- What is Hans Gruenn's NPI number?
- Hans Gruenn's National Provider Identifier (NPI) is 1649398371, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hans Gruenn's specialty?
- Hans Gruenn is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Hans Gruenn located?
- Hans Gruenn's practice location on file with NPPES is 350 W. Ojai Ave, Ojai, CA 93023-1650.
- What is Hans Gruenn's phone number?
- The practice phone number listed in the NPPES registry for Hans Gruenn is (058) 633-9121.
- Is Hans Gruenn's NPI active?
- Yes — Hans Gruenn's NPI (1649398371) is active in the NPPES registry as of the last update on 2020-11-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.