Irena Grauzinis, DO
NPI 1487303210 · Family Medicine Physician · Winters, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Irena Grauzinis, DO is a Family Medicine Physician provider in Winters, CA (NPI 1487303210).
Provider details
- NPI number
- 1487303210
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 20A21650 (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
4 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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Atorvastatin Calcium | 29 |
| Amlodipine Besylate | 18 |
| Lisinopril | 18 |
| Tizanidine Hcl | 13 |
| Gabapentin | 12 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 12 |
| Furosemide | 11 |
| Mirtazapine | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-03-21
- Last updated
- 2025-10-10
- Certified
- 2025-10-10
Frequently asked questions
- What is Irena Grauzinis's NPI number?
- Irena Grauzinis's National Provider Identifier (NPI) is 1487303210, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Irena Grauzinis's specialty?
- Irena Grauzinis is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Irena Grauzinis located?
- Irena Grauzinis's practice location on file with NPPES is 111 Main St Ste B, Winters, CA 95694-1930.
- What is Irena Grauzinis's phone number?
- The practice phone number listed in the NPPES registry for Irena Grauzinis is (530) 795-4591.
- Does Irena Grauzinis accept Medicare?
- Irena Grauzinis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Irena Grauzinis's NPI active?
- Yes — Irena Grauzinis's NPI (1487303210) is active in the NPPES registry as of the last update on 2025-10-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.