Carl William Buckhorn, M.D.
Internal Medicine Physician · Yorba Linda, CA
Carl William Buckhorn, M.D. is an internal medicine physician with a practice address in Yorba Linda, California, and NPI 1649264847, issued on Sep 2, 2005. Check the license (California G73630, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Carl William Buckhorn
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G73630 CA
Self-reported in NPPES; status is on the state search - Practice location
- 18300 Yorba Linda Blvd, Yorba Linda, CA 92886
- Phone
- (714) 577-6031
- Enumerated
- Sep 2, 2005
- Record last updated
- Jul 14, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (714) 572-2562
- Medicare enrollment
- Enrolled (PECOS I20051219001011); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 18300 Yorba Linda Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeanette Alves, P.A.Medical Physician Assistant1124189618
- Thomas Barker, M.D.Family Medicine Physician1275574097
- Christina Caputo, PAPhysician Assistant1366771891
- Xandi Craig, P.A.Medical Physician Assistant1285735258
- Gregg Denicola, MDFamily Medicine Physician1164469912
- Kathleen Diesto, RDNutritionist1174730063
Verify Carl William Buckhorn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G73630Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% more Medicare Part D claims than the average internal medicine physician in 2024
3,541 Medicare Part D claims for 297 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 410 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen216 claims
- Gabapentin121 claims
- Alprazolam117 claims
- Lisinopril109 claims
- Amlodipine Besylate104 claims
- Atorvastatin Calcium102 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.
Industry payments in 2024: $376.97
4 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
17 internal medicine physician records list a practice address in Yorba Linda
They are 17 of the 748 NPPES records with a practice address in Yorba Linda, and 17,696 internal medicine physician records in California.
All 17 in Yorba Linda → All 17,696 in California → Every provider in Yorba Linda →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Carl William Buckhorn, M.D.'s NPI number?
Carl William Buckhorn, M.D.'s National Provider Identifier (NPI) is 1649264847, issued on Sep 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Carl William Buckhorn, M.D. located?
The NPPES record lists a practice address at 18300 Yorba Linda Blvd, Yorba Linda, CA, 92886. Phone: (714) 577-6031. Providers update this record themselves, so call before visiting.
How can I verify Carl William Buckhorn, M.D.'s license?
NPPES lists California license number G73630, 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 Carl William Buckhorn, M.D. prescribe under Medicare Part D?
In 2024, Carl William Buckhorn, M.D. had 3,541 Medicare Part D claims for 297 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.