Dr. Karen E. Winter, DO
- Part D claims, 2024
- 4,431
- Hospital affiliations
- 1
- Industry payments
- $23
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 975 Sereno Dr, Vallejo, CA 94589
- Practice phone
- Call (707) 651-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Winter's professional email, personal email and mobile number
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Dr. Karen E. Winter is an internist in Vallejo, California
Dr. Winter practices at Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente.
Dr. Winter's NPI, 1740332972, was assigned on January 17, 2007. Dr. Winter graduated from Touro University California - Vallejo in 2003. Dr. Winter holds California license 20A9539.
- NPI
- 1740332972NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8820192677
- NPI enumeration date
- January 17, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 651-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Karen E. Winter practices at Vallejo Medical Center in Vallejo, California
Dr. Winter's primary practice is Vallejo Medical Center, at 975 Sereno Dr, Vallejo, CA 94589 in Solano County. The practice phone is (707) 651-1000.
- Vallejo Medical Center975 Sereno Dr, Vallejo, CA 94589 · Solano CountyPhone(707) 651-1000
Source: Dmand AI Affiliation Data
Dr. Karen E. Winter is affiliated with 3 sites of care and 1 medical group
Dr. Winter's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Winter to 1 more home health agency and 1 hospice, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Karen E. Winter's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Winter practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Vallejo Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Karen E. Winter is one of 16,751 internists in California
Internal medicine is Dr. Winter's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Winter is board certified in family medicine by the American Board of Family Medicine. Dr. Winter is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists lower back pain among the conditions Dr. Winter treats.
Internists near Dr. Winter
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Karen E. Winter's patients have a median age of 17
Across all payers, Dmand AI patient panel data puts Dr. Winter's median patient age at 17, with 58% women.
Dr. Winter's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 17
Patient panel by sex, all payers
- Women58%
- Men42%
Source: Dmand AI Patient Panel Data
Dr. Karen E. Winter wrote 4,431 Medicare Part D claims in 2024
In 2024, Dr. Winter wrote 4,431 Medicare Part D claims for 604 patients. 91% of them were for generic drugs. CMS names the drug for 3,926 of them, across 77 drugs with 11 or more claims each, at $104,549 in total drug cost. In 2023, CMS named 3,843 claims across 76 drugs.
Dr. Winter's Part D claims by kind of drug, 2024
- Generic4,033 claims91%
- Brand-name369 claims8%
- Other29 claims1%
Dr. Winter's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Winter's Part D claims, 2024
- Opioids3%145 of 4,431 claims
- Antibiotics2%107 of 4,431 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,8432024: 3,9262%
Drugs named by CMS: 77 in 2024, 76 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Karen E. Winter takes part in Medicare
Dr. Winter accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Karen E. Winter received $23 in industry payments in 2018
CMS Open Payments shows 1 general payment to Dr. Winter from 1 drug or device company in 2018. Food and beverage make up the largest share, 100% of the total. Abbott Laboratories paid the most, $23.
Companies that paid Dr. Winter the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Karen E. Winter has 1 award and honors on record
Dmand AI lists 1 award for Dr. Winter, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Winter
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Karen E. Winter graduated from Touro University California - Vallejo
Dr. Winter graduated from Touro University California - Vallejo in 2003.
- Medical school
- Board certified in family medicine
- Board certified in 2006 - 2026
- Board certified in 2003 - 2007
Source: Dmand AI Professional Profile Data
Dr. Karen E. Winter accepts plans from 2 insurance carriers
Dr. Winter is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Winter accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Karen E. Winter's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Karen E. Winter
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Karen E. Winter's NPI number?
Dr. Karen E. Winter's NPI number is 1740332972. It was assigned on January 17, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Karen E. Winter?
Dr. Karen E. Winter is an internist in Vallejo, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Karen E. Winter practice?
Dr. Winter practices at 975 Sereno Dr, Vallejo, CA 94589. Dr. Winter's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. Dmand AI also links Dr. Winter to 1 home health agency and 1 hospice.
What is Dr. Karen E. Winter's office phone number?
The practice phone on file for Dr. Winter is (707) 651-1000.
What is Dr. Karen E. Winter's medical license number?
Dr. Winter holds California license 20A9539.
Which hospitals is Dr. Karen E. Winter affiliated with?
Dr. Winter practices at Vallejo Medical Center in Vallejo, California.
What medical group is Dr. Karen E. Winter part of?
Dr. Winter is linked to The Permanente Medical Group, Inc.
Does Dr. Karen E. Winter accept Medicare?
Yes. CMS lists Dr. Winter as accepting Medicare assignment.
Is Dr. Karen E. Winter board certified?
Yes. Dr. Winter is board certified in family medicine by the American Board of Family Medicine.
Where did Dr. Karen E. Winter go to medical school?
Dr. Winter graduated from Touro University California - Vallejo in 2003.
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What drugs does Dr. Karen E. Winter prescribe most?
In 2024 Medicare Part D data, Dr. Winter's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Lisinopril.
Has Dr. Karen E. Winter received payments from drug or device companies?
CMS Open Payments shows $23 in general payments to Dr. Winter from 1 company from 2018 to 2018. The largest total came from Abbott Laboratories.
How long has Dr. Karen E. Winter been practicing?
Dr. Winter graduated from medical school in 2003, 23 years ago.
What insurance does Dr. Karen E. Winter accept?
Dr. Winter is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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