Gretchen Eileen Winter, PH.D., D.O.
Internal Medicine Physician · Templeton, CA
Gretchen Eileen Winter, PH.D., D.O. is an internal medicine physician with a practice address in Templeton, California, and NPI 1558640953, issued on Aug 16, 2011. Check the license (California 20A12705, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gretchen Eileen Winter
- Credential
- PH.D., D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A12705 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1100 Las Tablas RD, Templeton, CA 93465
- Phone
- (804) 434-4706
- Enumerated
- Aug 16, 2011
- Record last updated
- Jun 24, 2026
- Medicare enrollment
- Enrolled (PECOS I20130610000451); accepts Medicare assignment
- Medical or professional school
- Western University Of Health Sciences College Of Dental Med, 2010
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1100 Las Tablas RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Monica BasultoRegistered Nurse First Assistant1871307447
- Steven Benaron, MDEmergency Medicine Physician1366400657
- Scott Bisheff, MDEmergency Medicine Physician1871541748
- William Buys, DOEmergency Medicine Physician1639127376
- Raul Easton-Carr, M.D.Emergency Medicine Physician1144494642
- Gregory Frye, MDEmergency Medicine Physician1487602348
Verify Gretchen Eileen Winter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A12705Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
209 Medicare Part D claims for 112 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 12 claims were for opioids.
Most prescribed
- Furosemide15 claims
- Prednisone12 claims
- Amoxicillin-Clavulanate Potass11 claims
- Eliquis11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Galen Inpatient Physicians PCTempleton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gretchen Eileen Winter among 17,696 internal medicine physician records in California
Gretchen Eileen Winter, PH.D., D.O. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 66% of them.
- NPI issued2011 · 66% of these records are older, 32% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2010 · median 2004 among the 11,065 with a school on file
- Record last updated2026 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 internal medicine physician records list a practice address in Templeton
They are 16 of the 326 NPPES records with a practice address in Templeton, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Templeton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Allen Avedian, M.D.Templeton, CA 934651003340423
- Shannon Berry, M.D.Templeton, CA 934651013909811
- Suvarna Choudhari, M.D.Templeton, CA 934651578855995
- Kevin Colton, MDTempleton, CA 934651770542268
- Gregg Ellison, MDTempleton, CA 934651073573168
- Julie Fallon, M.D.Templeton, CA 934651790777506
- Steven McAllen, M.D.Templeton, CA 934651821081043
- Anphong NguyenTempleton, CA 934651962065920
Common questions
What is Gretchen Eileen Winter, PH.D., D.O.'s NPI number?
Gretchen Eileen Winter, PH.D., D.O.'s National Provider Identifier (NPI) is 1558640953, issued on Aug 16, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Gretchen Eileen Winter, PH.D., D.O. located?
The NPPES record lists a practice address at 1100 Las Tablas RD, Templeton, CA, 93465. Phone: (804) 434-4706. Providers update this record themselves, so call before visiting.
How can I verify Gretchen Eileen Winter, PH.D., D.O.'s license?
NPPES lists California license number 20A12705, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gretchen Eileen Winter, PH.D., D.O. prescribe under Medicare Part D?
In 2024, Gretchen Eileen Winter, PH.D., D.O. had 209 Medicare Part D claims for 112 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.