Karen Winter, DO
NPI 1740332972 · Internal Medicine Physician · Vallejo, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Winter, DO is a Internal Medicine Physician provider in Vallejo, CA (NPI 1740332972).
Provider details
- NPI number
- 1740332972
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 20A9539 (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 · 77 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 443 | 155 |
| Levothyroxine Sodium | 258 | 80 |
| Lisinopril | 222 | 78 |
| Losartan Potassium | 184 | 64 |
| Famotidine | 147 | 39 |
| Alendronate Sodium | 120 | 49 |
| Hydrochlorothiazide | 118 | 39 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-17
- Last updated
- 2022-01-11
Frequently asked questions
- What is Karen Winter's NPI number?
- Karen Winter's National Provider Identifier (NPI) is 1740332972, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Winter's specialty?
- Karen Winter is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Winter located?
- Karen Winter's practice location on file with NPPES is 975 Sereno Dr, Vallejo, CA 94589-2441.
- What is Karen Winter's phone number?
- The practice phone number listed in the NPPES registry for Karen Winter is (707) 651-1000.
- Does Karen Winter accept Medicare?
- Karen Winter is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Winter's NPI active?
- Yes — Karen Winter's NPI (1740332972) is active in the NPPES registry as of the last update on 2022-01-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.