Spencer Karl Wilhelm, MD
Surgery Physician · Orange, CA
Spencer Karl Wilhelm, MD is a surgery physician with a practice address in Orange, California, and NPI 1952962912, issued on Jun 20, 2019. Check the license (California 204915, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Spencer Karl Wilhelm
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- 204915 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1201 W LA Veta Ave, Orange, CA 92868
- Phone
- (714) 364-4050
- Enumerated
- Jun 20, 2019
- Record last updated
- Jul 13, 2026
- Fax
- (714) 364-4051
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 1201 W LA Veta Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sarah AbbamontoClinical Social Worker1396268553
- Yesenia Acosta, ACSWClinical Social Worker1114744513
- Natalie Adame, PNPPrimary Care Nurse Practitioner1750993622
- David Adams, M.D.Neurology with Special Qualifications in Child Neurology Physician1497109722
- William Adelman, M.D.Pediatric Adolescent Medicine Physician1831191386
- Isela Aguirre Verdugo, LCSWClinical Social Worker1316465834
Verify Spencer Karl Wilhelm in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 204915Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average surgery physician in 2024
18 Medicare Part D claims for 16 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 15 claims were for opioids.
Most prescribed
- Oxycodone Hcl11 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.
Spencer Karl Wilhelm among 3,118 surgery physician records in California
Spencer Karl Wilhelm, MD is one of 3,118 surgery physician records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 91% of them.
- NPI issued2019 · 91% of these records are older, 6% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2026 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in Orange → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Jeffrey Chao, MDOrange, CA 928681164515995
- Kim Charney, M.D.Orange, CA 928681699790899
- Hisham El-Bayar, M.D., F.A.C.S.Orange, CA 928681659376622
- Sami Hamamji, M.D.Orange, CA 928681457425282
- Jay Harness, M.D.Orange, CA 928681477549426
- David K Imagawa, MDOrange, CA 928681467532630
- Rajesh Khanijou, M.D.Orange, CA 928681548239098
- Eric Kuncir, M.D.Orange, CA 928681053382085
Common questions
What is Spencer Karl Wilhelm, MD's NPI number?
Spencer Karl Wilhelm, MD's National Provider Identifier (NPI) is 1952962912, issued on Jun 20, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Spencer Karl Wilhelm, MD located?
The NPPES record lists a practice address at 1201 W LA Veta Ave, Orange, CA, 92868. Phone: (714) 364-4050. Providers update this record themselves, so call before visiting.
How can I verify Spencer Karl Wilhelm, MD's license?
NPPES lists California license number 204915, 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 Spencer Karl Wilhelm, MD prescribe under Medicare Part D?
In 2024, Spencer Karl Wilhelm, MD had 18 Medicare Part D claims for 16 beneficiaries; the average among surgery physician prescribers was 147. 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.