Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Ann Duncan, MD

Individual provider Family Medicine Physician · NPI 1639513823

Ann Duncan, MD is registered under Family Practice in Folsom, California. Graduated from University of California, Irvine, California College of Medicine in 2013, 13 years ago. Practices with Sutter Valley Medical Foundation, a 2,464-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
13
Trained at
University of California, Irvine, California College of Medicine
Licensed in
CA
In the registry since
2013
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2575 E Bidwell St Ste 100
Folsom, CA 95630 Not confirmed with CMS for 10 years — call before visiting
Phone: (916) 817-3700
Fax: (916) 817-3701
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence A135992 (CA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X (CA)

Record details

NPI number1639513823
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 18, 2013
Last updated in NPPESSeptember 14, 2016

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF CALIFORNIA, IRVINE, CALIFORNIA COLLEGE OF MEDICINE
Graduated 2013 (13 years in practice)
Group practice Sutter Valley Medical Foundation — 2464 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 1–10 times
Removal or shaving of skin growth 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients128
Services billed 434 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Sutter Valley Medical Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2464 clinicians in the practice; 12 are shown here.

Other providers in Folsom