Curtis D. Buck, D.O.
Family Medicine Physician · San Marcos, CA
Curtis D. Buck, D.O. is a family medicine physician with a practice address in San Marcos, California, and NPI 1245522440, issued on May 5, 2011. Check the license (California 20A12645, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Curtis D. Buck
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A12645 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Craven RD, San Marcos, CA 92078
- Phone
- (800) 290-5000
- Enumerated
- May 5, 2011
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150217001208); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 400 Craven RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tracy Abrams, R.N.Registered Nurse1073991261
- Eric Adiarte, M.D.Obstetrics & Gynecology Physician1902038284
- Shreya Aiyar, MDPediatrics Physician1922685981
- Najlaa Al-Jibouri, PHARM DPharmacist1447438965
- Jennifer Alexander, RCP, RRTPulmonary Function Technologist Certified Respiratory Therapist1023596442
- Marisa Alunni, M.D.Obstetrics & Gynecology Physician1710298476
Verify Curtis D. Buck in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A12645Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average family medicine physician in 2024
719 Medicare Part D claims for 469 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 21 claims were for opioids.
Most prescribed
- Doxycycline Monohydrate102 claims
- Cefadroxil46 claims
- Prednisone46 claims
- Meloxicam43 claims
- Amoxicillin-Clavulanate Potass39 claims
- Cefpodoxime Proxetil39 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
- Southern California Permanente Medical GroupSan Marcos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Curtis D. Buck among 17,133 family medicine physician records in California
Curtis D. Buck, D.O. 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 2011, is newer than 63% of them.
- NPI issued2011 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2011 · median 2005 among the 10,652 with a school on file
- Record last updated2021 · 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).
47 family medicine physician records list a practice address in San Marcos
They are 47 of the 1,985 NPPES records with a practice address in San Marcos, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Marcos → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Imran Ahmed, MDSan Marcos, CA 920781588682561
- Liliana Alvarez-Martinez, MDSan Marcos, CA 920781790833119
- Christopher Cutter, MDSan Marcos, CA 920781538274287
- Luis Esquenazi, M.D.San Marcos, CA 920781700959848
- Corinne Giesemann, MDSan Marcos, CA 920781730115601
- Alan KrystalSan Marcos, CA 920781215078399
- Ledesma Mangubat, MDSan Marcos, CA 920781730237769
- Benny Martin, DOSan Marcos, CA 920781619975232
Common questions
What is Curtis D. Buck, D.O.'s NPI number?
Curtis D. Buck, D.O.'s National Provider Identifier (NPI) is 1245522440, issued on May 5, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Curtis D. Buck, D.O. located?
The NPPES record lists a practice address at 400 Craven RD, San Marcos, CA, 92078. Phone: (800) 290-5000. Providers update this record themselves, so call before visiting.
How can I verify Curtis D. Buck, D.O.'s license?
NPPES lists California license number 20A12645, 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 Curtis D. Buck, D.O. prescribe under Medicare Part D?
In 2024, Curtis D. Buck, D.O. had 719 Medicare Part D claims for 469 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.