Ahmad A. Hajj, MD
Orthopaedic Surgery Physician · Santa Ana, CA
Ahmad A. Hajj, MD is an orthopaedic surgery physician with a practice address in Santa Ana, California, and NPI 1043287345, issued on Mar 6, 2006. Check the license (California C40971, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ahmad A. Hajj
- Credential
- MD
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- C40971 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1220 Hemlock Way, Santa Ana, CA 92707
- Phone
- (714) 957-5721
- Enumerated
- Mar 6, 2006
- Record last updated
- May 22, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (714) 957-5872
- Medicaid ID
- GR0063390 CA
- Medicare enrollment
- Enrolled (PECOS I20080118000238); may accept Medicare assignment
- Entity
- Type 1 · individual
Also registered at 1220 Hemlock Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Huu Nguyen, M.D.Internal Medicine Physician1396922068
- Hamid Rahman, MDOrthopaedic Surgery Physician1235199514
Verify Ahmad A. Hajj in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C40971Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
55 Medicare Part D claims for 21 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 34 claims were for opioids.
Most prescribed
- Tramadol Hcl29 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: $6,086.69
4 payments; by number, the most common kind was food and beverage; the largest payer was Citieffe, Inc. The 15,003 providers of this specialty with any payment received $23,022.89 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.
Orthopaedic Surgery Physician providers in California
There are 2,276 orthopaedic surgery physician records in California.
Other orthopaedic surgery physician records in California
- Karim Abdollahi, M.D.Laguna Beach, CA1942240403
- Michael Abdulian, MDGlendale, CA1649469628
- Hussein Abdulrassoul, MDRiverside, CA1972123891
- Douglas Abeles, MDCastro Valley, CA1508961582
- Anthony Abene, MDSan Jose, CA1457437964
- Torgom Abraamyan, M.D.Van Nuys, CA1013370410
- Monther AbuhantashSan Francisco, CA1447041512
- Joshua Acebo, MDPalo Alto, CA1396373734
- Daniel Acevedo, M.D.Thousand Oaks, CA1184856122
- John Adams, MDLos Angeles, CA1215914114
Common questions
What is Ahmad A. Hajj, MD's NPI number?
Ahmad A. Hajj, MD's National Provider Identifier (NPI) is 1043287345, issued on Mar 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ahmad A. Hajj, MD located?
The NPPES record lists a practice address at 1220 Hemlock Way, Santa Ana, CA, 92707. Phone: (714) 957-5721. Providers update this record themselves, so call before visiting.
How can I verify Ahmad A. Hajj, MD's license?
NPPES lists California license number C40971, 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 Ahmad A. Hajj, MD prescribe under Medicare Part D?
In 2024, Ahmad A. Hajj, MD had 55 Medicare Part D claims for 21 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. 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.