William N. Holmes, M.D.
Diagnostic Radiology Physician · Orange, CA
William N. Holmes, M.D. is a diagnostic radiology physician with a practice address in Orange, California, and NPI 1700811700, issued on Jul 11, 2006. Check the license (California A104831, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William N. Holmes
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License numbers
- A104831 CA
227340 MA
Self-reported in NPPES; status is on the state search - Practice location
- 431 S Batavia St, Orange, CA 92868
- Phone
- (714) 538-6731
- Enumerated
- Jul 11, 2006
- Record last updated
- Jan 9, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (714) 771-8369
- Medicare enrollment
- Enrolled (PECOS I20081230000246); accepts Medicare assignment
- Medical or professional school
- University Of Vermont College Of Medicine, 2001
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →
Also registered at 431 S Batavia St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Angela Allevato, M.D.Pediatrics Physician1588609382
- Leticia AndradeBehavior Technician1952291858
- Iliana BeltranBehavior Technician1235028283
- Elizabeth Cambray-Forker, D.O.Diagnostic Radiology Physician1295734838
- June Chen, M.D.Diagnostic Radiology Physician1851384689
- Richard Cho, MDDiagnostic Radiology Physician1376767194
Verify William N. Holmes in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A104831Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Childrens Hospital OF Orange CountyOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William N. Holmes among 4,500 diagnostic radiology physician records in California
William N. Holmes, M.D. is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2001 · median 2004 among the 3,130 with a school on file
- Record last updated2009 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
122 diagnostic radiology physician records list a practice address in Orange
They are 122 of the 13,245 NPPES records with a practice address in Orange, and 4,500 diagnostic radiology physician records in California.
All 4,500 in California → Every provider in Orange → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Elizabeth Cambray-Forker, D.O.Orange, CA 928681295734838
- Michael Forino, M.D.Orange, CA 928681891794319
- David Karlin, M.D.Orange, CA 928681477552016
- Paul Kupperstein, D.O.Orange, CA 928681679572218
- Mark Masotto, M.D.Orange, CA 928681033118336
- Stanley Nakamoto, M.D.Orange, CA 928681285633784
- Kurt Openshaw, M.D.Orange, CA 928681881693174
- Barry Paull, M.D.Orange, CA 928681982603486
Common questions
What is William N. Holmes, M.D.'s NPI number?
William N. Holmes, M.D.'s National Provider Identifier (NPI) is 1700811700, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William N. Holmes, M.D. located?
The NPPES record lists a practice address at 431 S Batavia St, Orange, CA, 92868. Phone: (714) 538-6731. Providers update this record themselves, so call before visiting.
How can I verify William N. Holmes, M.D.'s license?
NPPES lists California license number A104831, 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.
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.