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

Dr. David Alan Duncan, DO

Individual provider Family Medicine Physician · NPI 1710967922

Dr. David Alan Duncan, DO is registered under Family Practice in San Ramon, California. Qualified in 2011, 15 years ago. Practices with American Current Care of California a Medical Corporation, a 140-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California and Indiana.

Years since qualifying
15
Licensed in
CA, IN
In the registry since
2006
Specialties on file
3
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

3268 Casa Grande Dr
San Ramon, CA 94583-3004
Phone: (415) 237-1843
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1801 Shattuck Ave Ste A, Berkeley, CA 94709-1872 — (888) 663-6331

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 20A15980 (CA)
Family Medicine Physician Taxonomy 207Q00000X · Licence 02002571A (IN)
Addiction Medicine (Family Medicine) Physician Taxonomy 207QA0401X · Licence 20A15980 (CA)

Record details

NPI number1710967922
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJanuary 23, 2006
Last updated in NPPESSeptember 1, 2026
Certification dateSeptember 1, 2026

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 2011 (15 years in practice)
Group practice American Current Care Of California A Medical Corporation — 140 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $23 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Colleagues at American Current Care of California a Medical Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 140 clinicians in the practice; 12 are shown here.

Other providers in San Ramon