Ann Duncan, M.D.
Family Medicine Physician · Folsom, CA
Ann Duncan, M.D. is a family medicine physician with a practice address in Folsom, California, and NPI 1639513823, issued on Apr 18, 2013. Check the license (California A135992, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ann Duncan
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A135992 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2575 East Bidwell St, Folsom, CA 95630
- Phone
- (916) 817-3700
- Enumerated
- Apr 18, 2013
- Record last updated
- Sep 14, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (916) 817-3701
- Medicare enrollment
- Enrolled (PECOS I20160922001287); accepts Medicare assignment
- Medical or professional school
- University Of California, Irvine, California College Of Medicine, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify Ann Duncan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A135992Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% fewer Medicare Part D claims than the average family medicine physician in 2024
2,036 Medicare Part D claims for 204 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 73 claims were for opioids.
Most prescribed
- Atorvastatin Calcium149 claims
- Levothyroxine Sodium92 claims
- Losartan Potassium78 claims
- Gabapentin60 claims
- Amlodipine Besylate54 claims
- Omeprazole53 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
- Sutter Valley Medical FoundationRoseville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ann Duncan among 17,133 family medicine physician records in California
Ann Duncan, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 68% of them.
- NPI issued2013 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2013 · median 2005 among the 10,652 with a school on file
- Record last updated2016 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
59 family medicine physician records list a practice address in Folsom
They are 59 of the 1,811 NPPES records with a practice address in Folsom, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Folsom → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Rose Arellanes, M.D.Folsom, CA 956301902889512
- Victor Baquero, MDFolsom, CA 956301740265909
- Clinton Collins, MDFolsom, CA 956301275568651
- Ronald Flores, MDFolsom, CA 956301386610665
- Roy Greenberg, MDFolsom, CA 956301790779478
- Nancy Jaeger, MDFolsom, CA 956301518957992
- Marcella Jaeger, M.D.Folsom, CA 956301902858483
- Hamid Kazerouni Zadeh, MDFolsom, CA 956301952391344
Common questions
What is Ann Duncan, M.D.'s NPI number?
Ann Duncan, M.D.'s National Provider Identifier (NPI) is 1639513823, issued on Apr 18, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Ann Duncan, M.D. located?
The NPPES record lists a practice address at 2575 East Bidwell St, Folsom, CA, 95630. Phone: (916) 817-3700. Providers update this record themselves, so call before visiting.
How can I verify Ann Duncan, M.D.'s license?
NPPES lists California license number A135992, 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 Ann Duncan, M.D. prescribe under Medicare Part D?
In 2024, Ann Duncan, M.D. had 2,036 Medicare Part D claims for 204 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.