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DR. DUKE AHN M.D.
NPI 1942318373
Orthopaedic Surgery in Los Alamitos, CA

Active since August 27, 2006PECOS EnrolledAccepts Medicare Assignment
3700 KATELLA AVE STE C, LOS ALAMITOS, CA 90720(562) 583-2250(562) 583-2254 Get Directions Write a Review

NPPES record last updated: June 17, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Duke Ahn M.d. NPPES

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

DR. DUKE AHN M.D. (NPI 1942318373) is an individual orthopaedic surgery provider in Los Alamitos, California, licensed in California (G84554) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Northwestern University Feinberg Medical School (1990).

NPPES Registry Identity

NPI1942318373
Entity TypeIndividualMale
Primary Taxonomy207X00000X
Provider Legal NameDR. DUKE AHNCredential: M.D.
Location Address3700 KATELLA AVE STE CLos Alamitos, CA 90720-6409
Mailing Address1040 Elm Ave, Suite 100Long Beach, CA 90813-3264 · (562) 591-4444 · Fax (562) 436-7350
Phone(562) 583-2250
Fax(562) 583-2254
Sole ProprietorNo
Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 1990
Enumeration DateAugust 27, 2006
Last NPPES UpdateJune 17, 2020
NPPES CertifiedJune 17, 2020
✔ NPI 1942318373 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 · G84554
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.
3700 KATELLA AVE STE C, Los Alamitos, CA 90720
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Other Identifiers 2

Medicaid00G845540CA
OtherG084554CA · License

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Duke Ahn M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5698713626
PECOS Enrollment IDI20050420001017
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 Duke Ahn reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Prohealth Partners A Medical Group
Same address
Family Medicine
3700 KATELLA AVE STE D
Los Alamitos, CA 90720
  • Reassigned Medicare billing, California enrollment
  • 279 clinicians in this Medicare group
NPI 1902407711 (562) 855-2700

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 7

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
106 services62 patients
Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg J0702
This injection contains two medications, betamethasone acetate and betamethasone sodium phosphate. It is used to reduce inflammation and pain. It's given by a healthcare professional, often directly into the area causing discomfort.
90 services33 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
89 services59 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
76 services76 patients
Aspiration and/or injection of fluid large joint using ultrasound guidance 20611
This procedure involves using ultrasound technology to accurately locate a large joint, usually the knee or shoulder. A needle is then inserted to either extract fluid (aspiration) or inject medication. The ultrasound helps ensure precision and safety.
32 services24 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
26 services26 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90720 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 2

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

DAHN MEDICAL INC
Orthopaedic Surgery
3700 KATELLA AVE STE C
LOS ALAMITOS, CA 90720
Orange County (562) 583-2250
PROHEALTH PARTNERS A MEDICAL GROUP
Orthopaedic Surgery
3700 KATELLA AVE STE C
LOS ALAMITOS, CA 90720
Orange County (562) 583-2250

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 Duke Ahn's NPI number?

The NPI number for Duke Ahn is 1942318373. It was assigned to this individual provider in the NPPES registry on August 27, 2006.

Where is Duke Ahn located?

Duke Ahn practices at 3700 Katella Ave Ste C, Los Alamitos, CA 90720. The listed phone number is (562) 583-2250.

What is Duke Ahn's specialty?

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

Is Duke Ahn enrolled in Medicare?

Yes. Duke Ahn is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Duke Ahn's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Duke Ahn reassigns Medicare benefits to Prohealth Partners A Medical Group (Los Alamitos, 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 Duke Ahn'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 Duke Ahn was last updated on June 17, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.