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AHMAD A HAJJ MD
NPI 1043287345
Orthopaedic Surgery in Santa Ana, CA

Active since March 06, 2006PECOS Enrolled
1220 HEMLOCK WAY, STE 203, SANTA ANA, CA 92707(714) 957-5721(714) 957-5872 Get Directions Write a Review

NPPES record last updated: May 22, 2014. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Ahmad A Hajj Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

AHMAD A HAJJ MD (NPI 1043287345) is an individual orthopaedic surgery provider in Santa Ana, California, licensed in California (C40971) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1974).

NPPES Registry Identity

NPI1043287345
Entity TypeIndividualMale
Primary Taxonomy207X00000X
Provider Legal NameAHMAD A HAJJCredential: MD
Location Address1220 HEMLOCK WAY, STE 203Santa Ana, CA 92707-3650
Mailing Address1220 Hemlock Way, Ste 203Santa Ana, CA 92707-3650 · (714) 957-5721 · Fax (714) 957-5872
Phone(714) 957-5721
Fax(714) 957-5872
Sole ProprietorNo
Medical School CMSOtherGraduated 1974
Enumeration DateMarch 6, 2006
Last NPPES UpdateMay 22, 2014
✔ NPI 1043287345 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207X00000X
License✔ Licensed in CA · C40971
Definition
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
1220 HEMLOCK WAY, Santa Ana, CA 92707
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Other Identifiers 3

Medicare UPINA37490
MedicaidGR0063390CA
Medicare ID-Type UnspecifiedWC40971ACA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ahmad A Hajj Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6709872336
PECOS Enrollment IDI20080118000238
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Ahmad Hajj reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ahmad Hajj MD Inc
Same address
Orthopaedic Surgery
1220 HEMLOCK WAY, 203
Santa Ana, CA 92707
  • Reassigned Medicare billing, California enrollment
NPI 1306274923 (714) 957-5721

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
18 services18 patients
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221
Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.
14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92707 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MR. JOSEPH M. TAGLIARINI D.C.
Chiropractor
1220 HEMLOCK WAY, SUITE 111
SANTA ANA, CA 92707
Orange County (714) 547-0777
FERDOUS F. KAZEMI, MD
Pediatrics
1220 HEMLOCK WAY, STE. 105B
SANTA ANA, CA 92707
Orange County (714) 966-6666
TAGLIARINI CHIROPRACTIC, INC.
Chiropractor
1220 HEMLOCK WAY, SUITE 111
SANTA ANA, CA 92707
Orange County (714) 547-0777
SEIN CHIROPRACTIC
Chiropractor
1220 HEMLOCK WAY, SUITE 105A
SANTA ANA, CA 92707
Orange County (714) 751-7048
HAMID U RAHMAN MD
Orthopaedic Surgery
1220 HEMLOCK WAY, STE 200
SANTA ANA, CA 92707
Orange County (714) 751-0101
CARLO Z BISCARO MD
Orthopaedic Surgery
1220 HEMLOCK WAY, STE 200
SANTA ANA, CA 92707
Orange County (714) 751-0101
IRVINE COAST MRI MEDICAL GROUP
Radiology (Diagnostic Radiology)
1220 HEMLOCK WAY, SUITE 106
SANTA ANA, CA 92707
Orange County (714) 545-9441
AHMAD HAJJ MD INC
Orthopaedic Surgery
1220 HEMLOCK WAY, 203
SANTA ANA, CA 92707
Orange County (714) 957-5721

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ahmad Hajj's NPI number?

The NPI number for Ahmad Hajj is 1043287345. It was assigned to this individual provider in the NPPES registry on March 6, 2006.

Where is Ahmad Hajj located?

Ahmad Hajj practices at 1220 Hemlock Way Ste 203, Santa Ana, CA 92707. The listed phone number is (714) 957-5721.

What is Ahmad Hajj's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is Ahmad Hajj enrolled in Medicare?

Yes. Ahmad Hajj is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Ahmad Hajj's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ahmad Hajj reassigns Medicare benefits to Ahmad Hajj MD Inc (Santa Ana, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ahmad Hajj's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Ahmad Hajj was last updated on May 22, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.