Duncan Holbert
Family Medicine Physician · Santa Cruz, CA
Duncan Holbert is a family medicine physician with a practice address in Santa Cruz, California, and NPI 1770563520, issued on Jan 18, 2006. Check the license (California A24230, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Duncan Holbert
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A24230 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2025 Soquel Ave, Santa Cruz, CA 95062
- Phone
- (831) 458-5537
- Enumerated
- Jan 18, 2006
- Record last updated
- Jul 13, 2026
- Medicare enrollment
- Enrolled (PECOS I20080630000393); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1970
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 2025 Soquel Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Duncan Holbert in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A24230Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
19 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Duncan Holbert among 17,133 family medicine physician records in California
Duncan Holbert 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1970 · median 2005 among the 10,652 with a school on file
- Record last updated2026 · 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).
114 family medicine physician records list a practice address in Santa Cruz
They are 114 of the 5,138 NPPES records with a practice address in Santa Cruz, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Santa Cruz → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Rachel Abrams, M.D.Santa Cruz, CA 950621578542171
- David Beck, MDSanta Cruz, CA 950621235101122
- Deborah Bronstein, M.D.Santa Cruz, CA 950621245219393
- William Ebert, MDSanta Cruz, CA 950621982609848
- Bruce Eisendorf, M.D.Santa Cruz, CA 950621760462824
- Dawn Faber, M.D.Santa Cruz, CA 950621346201878
- Patricia Hinz, M.D.Santa Cruz, CA 950621750361077
- Sharon JamiesonSanta Cruz, CA 950621932189701
Common questions
What is Duncan Holbert's NPI number?
Duncan Holbert's National Provider Identifier (NPI) is 1770563520, issued on Jan 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Duncan Holbert located?
The NPPES record lists a practice address at 2025 Soquel Ave, Santa Cruz, CA, 95062. Phone: (831) 458-5537. Providers update this record themselves, so call before visiting.
How can I verify Duncan Holbert's license?
NPPES lists California license number A24230, 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 Duncan Holbert prescribe under Medicare Part D?
In 2024, Duncan Holbert had 19 Medicare Part D claims; 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.