Ronald C. Holness, MD
Surgery Physician · Los Alamitos, CA
Ronald C. Holness, MD is a surgery physician with a practice address in Los Alamitos, California, and NPI 1114938867, issued on Aug 10, 2006. Check the license (California G55605, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ronald C. Holness
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- G55605 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3801 Katella Ave, Los Alamitos, CA 90720
- Phone
- (562) 598-2439
- Enumerated
- Aug 10, 2006
- Record last updated
- Feb 25, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (562) 598-0022
- Medicare enrollment
- Enrolled (PECOS I20040317000735); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1983
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 3801 Katella Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Georganne Cashdollar, N.P.Primary Care Nurse Practitioner1578860086
- Mark Castellanet, M.D.Cardiovascular Disease Physician1538165782
Verify Ronald C. Holness in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G55605Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average surgery physician in 2024
35 Medicare Part D claims for 24 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D.
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: $27.07
1 payment: food and beverage; the largest payer was Organogenesis Inc. The 17,103 providers of this specialty with any payment received $3,513.80 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.
Ronald C. Holness among 3,118 surgery physician records in California
Ronald C. Holness, 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1983 · median 2003 among the 1,901 with a school on file
- Record last updated2013 · 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 Los Alamitos → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Dena Amr, MDLos Alamitos, CA 907201710035746
- Allen Anae, MDLos Alamitos, CA 907201861425183
- Ali Fouladi, M.D.Los Alamitos, CA 907201679779797
- Denise Joseph-Brown, M.D.Los Alamitos, CA 907201548457807
- Eugene Kahn, MDLos Alamitos, CA 907201699193649
- Andre Maginot, MDLas Alamitos, CA 907201841206471
- Jessica Rayhanabad, M.D.Los Alamitos, CA 907201275719403
- Grant Sarkisyan, M.D.Los Alamitos, CA 907201134328859
Common questions
What is Ronald C. Holness, MD's NPI number?
Ronald C. Holness, MD's National Provider Identifier (NPI) is 1114938867, issued on Aug 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ronald C. Holness, MD located?
The NPPES record lists a practice address at 3801 Katella Ave, Los Alamitos, CA, 90720. Phone: (562) 598-2439. Providers update this record themselves, so call before visiting.
How can I verify Ronald C. Holness, MD's license?
NPPES lists California license number G55605, 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 Ronald C. Holness, MD prescribe under Medicare Part D?
In 2024, Ronald C. Holness, MD had 35 Medicare Part D claims for 24 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.