Gregory Rosa, MD
NPI 1902861453 · Family Medicine Physician · Sebastopol, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Rosa, MD is a Family Medicine Physician provider in Sebastopol, CA (NPI 1902861453).
Provider details
- NPI number
- 1902861453
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- C35981 (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
20 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
1,083 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) |
|---|---|---|
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 312 | $99 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 311 | $99 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 174 | $63 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 102 | $139 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 87 | $141 |
| Administration of Influenza Virus VaccineG0008 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 61 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 207 | 63 |
| Levothyroxine Sodium | 189 | 57 |
| Amlodipine Besylate | 111 | 30 |
| Trazodone Hcl | 87 | 17 |
| Lisinopril | 86 | 22 |
| Indapamide | 84 | 24 |
| Metformin Hcl | 79 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-19
- Last updated
- 2011-06-03
Frequently asked questions
- What is Gregory Rosa's NPI number?
- Gregory Rosa's National Provider Identifier (NPI) is 1902861453, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Rosa's specialty?
- Gregory Rosa is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Rosa located?
- Gregory Rosa's practice location on file with NPPES is 6800 Palm Ave, Sebastopol, CA 95472-4269.
- What is Gregory Rosa's phone number?
- The practice phone number listed in the NPPES registry for Gregory Rosa is (707) 823-7616.
- Does Gregory Rosa accept Medicare?
- Gregory Rosa is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Rosa's NPI active?
- Yes — Gregory Rosa's NPI (1902861453) is active in the NPPES registry as of the last update on 2011-06-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.