DR. AARON JOSEPH AHEARN MD-PHD
NPI 1588839997
Transplant Surgery in Newport Beach, CA

Q: What is Aaron Ahearn's NPI number?

The NPI number for Aaron Ahearn is 1588839997. It was assigned to this individual provider in the NPPES registry on April 25, 2008.

Q: What is Aaron Ahearn's specialty?

The primary specialty registered for this NPI is Transplant Surgery with taxonomy code 204F00000X.

Q: When was this NPI record last updated?

The NPPES record for Aaron Ahearn was last updated on May 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.

Active since April 25, 2008PECOS EnrolledAccepts Medicare Assignment

500 SUPERIOR AVE, NEWPORT BEACH, CA 92663(949) 764-5793(949) 764-5792 Get Directions Write a Review

NPPES record last updated: May 29, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 29, 2026, Oct 27, 2020, Aug 24, 2018 and 2 more (5 updates tracked since 2016).

On this page

About Dr. Aaron Joseph Ahearn Md-phd NPPES

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

DR. AARON JOSEPH AHEARN MD-PHD (NPI 1588839997) is an individual transplant surgery provider in Newport Beach, California, licensed in California (A103008) and active in the NPI registry since April 2008. He is enrolled in Medicare PECOS and is a graduate of University Of Maryland School Of Medicine (2006).

NPPES Registry Identity

NPI1588839997

Entity TypeIndividualMale

Primary Taxonomy204F00000X

Provider Legal NameDR. AARON JOSEPH AHEARNCredential: MD-PHD

Location Address500 SUPERIOR AVENewport Beach, CA 92663-3657

Mailing AddressPo Box 31309Los Angeles, CA 90031-0309 · (323) 442-5908

Phone(949) 764-5793

Fax(949) 764-5792

Sole ProprietorNo

Medical School CMSUniversity Of Maryland School Of MedicineGraduated 2006

Enumeration DateApril 25, 2008

Last NPPES UpdateMay 29, 20265 updates tracked since enumeration

NPPES CertifiedMay 29, 2026

✔ NPI 1588839997 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyTransplant SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code204F00000X

Licenses✔ Licensed in CA · A103008✔ Licensed in MA · 262959

Definition

A surgeon who specializes in transplant surgery. Source: National Uniform Claim Committee

500 SUPERIOR AVE, Newport Beach, CA 92663

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Taro Health.Insurance ›

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. Aaron Joseph Ahearn Md-phd 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 ID2567600984

PECOS Enrollment IDI20130524000211

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 Reassignments

Medicare enrollment records show Aaron Ahearn reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Hoag Clinic

Same address

Primary Care

510 SUPERIOR AVE
Newport Beach, CA 92663

Reassigned Medicare billing, California enrollment
529 clinicians in this Medicare group

NPI 1942799523 (949) 791-3001

Usc Care Medical Group, Inc

34 mi

General Practice

1520 SAN PABLO ST
Los Angeles, CA 90033

Reassigned Medicare billing, California and Nevada enrollments
2,445 clinicians in this Medicare group

NPI 1902846306 (323) 442-5955

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

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

122 services22 patients

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

2 suppliers11 claims22 services$6.57 avg. paid by Medicare

Tacrolimus, immediate release, oral, 1 mg J7507

Treatment-Treatment - Miscellaneous · category RX029N

2 suppliers11 claims2,175 services$0.33 avg. paid by Medicare

Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511

Treatment-Chemotherapy · category RH012N

2 suppliers14 claims14 services$18.90 avg. paid by Medicare

Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512

Treatment-Chemotherapy · category RH012N

2 suppliers15 claims17 services$12.63 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

HOAG ENDOSCOPY CENTER

Clinic/Center (Endoscopy)

500 SUPERIOR AVE, SUITE 120
NEWPORT BEACH, CA 92663

Orange County (949) 722-9600

IVY ZHENG CRNP

Nurse Practitioner

500 SUPERIOR AVE
NEWPORT BEACH, CA 92663

Orange County (949) 764-5793

DR. JASON SEAN MUIR M.D., M.A.

Psychiatry & Neurology (Neurology)

500 SUPERIOR AVE, SUITE 305
NEWPORT BEACH, CA 92663

Orange County (949) 764-1843

MRS. ANGELA BOHNING RNP

Nurse Practitioner (Obstetrics & Gynecology)

500 SUPERIOR AVE, SUITE 310
NEWPORT BEACH, CA 92663

Orange County (949) 650-7100

DR. DENNIS T JORDANIDES M.D.

Internal Medicine

500 SUPERIOR AVE, SUITE 135
NEWPORT BEACH, CA 92663

Orange County (949) 734-7446

CHELSEA HONRATH

Dietitian, Registered

500 SUPERIOR AVE
NEWPORT BEACH, CA 92663

Orange County (949) 764-7277

HUNTINGTON REPRODUCTIVE CENTER MEDICAL GROUP, A MEDICAL CORPORATION

Clinical Medical Laboratory

500 SUPERIOR AVE, SUITE 210
NEWPORT BEACH, CA 92663

Orange County (949) 287-5600

PEDITRIC SUBSPECIALY FACULTY

Pediatrics

500 SUPERIOR AVE
NEWPORT BEACH, CA 92663

Orange County (714) 516-4295

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 Aaron Ahearn's NPI number?

The NPI number for Aaron Ahearn is 1588839997. It was assigned to this individual provider in the NPPES registry on April 25, 2008.

Where is Aaron Ahearn located?

Aaron Ahearn practices at 500 Superior Ave, Newport Beach, CA 92663. The listed phone number is (949) 764-5793.

What is Aaron Ahearn's specialty?

The primary specialty registered for this NPI is Transplant Surgery with taxonomy code 204F00000X.

Is Aaron Ahearn enrolled in Medicare?

Yes. Aaron Ahearn 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 organizations bill Medicare for Aaron Ahearn's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Ahearn reassigns Medicare benefits to 2 organizations: Hoag Clinic (Newport Beach, CA) and Usc Care Medical Group, Inc (Los Angeles, CA). Each 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 Aaron Ahearn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Aaron Ahearn accept?

Health plans from Taro Health list Aaron Ahearn as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Aaron Ahearn was last updated on May 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.