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ASHLEY GEFEN M.D.
NPI 1740636141
Pediatrics - Pediatric Nephrology in Phoenix, AZ

Active since May 04, 2016PECOS EnrolledAccepts Medicare Assignment
1919 E THOMAS RD, PHOENIX, AZ 85016(602) 933-0965(602) 933-4610 Get Directions Write a Review

NPPES record last updated: August 29, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Aug 29, 2023, Feb 6, 2023 (2 updates tracked since 2023).

About Ashley Gefen M.d. NPPES

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

ASHLEY GEFEN M.D. (NPI 1740636141) is an individual pediatric nephrology provider in Phoenix, Arizona, licensed in Arizona (69215) and active in the NPI registry since May 2016. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2016).

NPPES Registry Identity

NPI1740636141
Entity TypeIndividualFemale
Primary Taxonomy2080P0210X
Provider Legal NameASHLEY GEFENCredential: M.D.
Location Address1919 E THOMAS RDPhoenix, AZ 85016-7710
Mailing Address2108 E Thomas Rd Ste 130Phoenix, AZ 85016-0008 · (602) 933-3124
Phone(602) 933-0965
Fax(602) 933-4610
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateMay 4, 2016
Last NPPES UpdateAugust 29, 20232 updates tracked since enumeration
NPPES CertifiedAugust 29, 2023
✔ NPI 1740636141 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0210X
Licenses✔ Licensed in AZ · 69215✔ Licensed in CA · A176441
Definition
A pediatrician who deals with the normal and abnormal development and maturation of the kidney and urinary tract, the mechanisms by which the kidney can be damaged, the evaluation and treatment of renal diseases, fluid and electrolyte abnormalities, hypertension and renal replacement therapy.
1919 E THOMAS RD, Phoenix, AZ 85016
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1550 1st AveNew York, NY 10016-6402 · Phone (212) 263-5506
Location 24650 W Sunset BlvdLos Angeles, CA 90027-6062 · Phone (323) 660-2450

Other Identifiers 1

Medicaid153433AZ

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

Ashley Gefen 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 ID8022309467
PECOS Enrollment IDI20230727003443
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

3

Medicare enrollment records show Ashley Gefen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Phoenix Children's Hospital
Same address
Pediatrics
1919 E THOMAS RD
Phoenix, AZ 85016
  • Reassigned Medicare billing, Arizona enrollment
  • 1,416 clinicians in this Medicare group
NPI 1922112044 (602) 933-1000
Faculty Physicians And Surgeons Of Llusm
241 mi
Pediatrics
82934 CIVIC CENTER DR
Indio, CA 92201
  • Reassigned Medicare billing, California enrollment
  • 2,584 clinicians in this Medicare group
NPI 1710487962 (760) 477-0733
Children's Hospital Los Angeles Medical Group, Inc.
362 mi
Multi-Specialty
4650 SUNSET BLVD
Los Angeles, CA 90027
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Childrens Hospital Los Angeles Medical Group Inc
  • 1,281 clinicians in this Medicare group
NPI 1265530653 (323) 361-2337

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

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.

DR. TIMUR RAGHIB M.D.
Hospitalist
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-0777
MRS. MARIA T ESCOBAR CSP, RD
Dietitian, Registered
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (480) 440-2787
DR. AHMAR HUSAIN MD
Anesthesiology (Pediatric Anesthesiology)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-4660
MRS. SOLEE R COWLEY LCSW
Social Worker (Clinical)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-0414
MR. SEAN PATRICK BRADY DO
Anesthesiology (Pediatric Anesthesiology)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-4660
PRIYA PRASHER M.D.
Pediatrics
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-1900
DR. AMIT RAJARAM D.O.
Pediatrics
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-0198
LAURA GARDNER HAMANT
Pediatrics (Pediatric Gastroenterology)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-1000

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 Ashley Gefen's NPI number?

The NPI number for Ashley Gefen is 1740636141. It was assigned to this individual provider in the NPPES registry on May 4, 2016.

Where is Ashley Gefen located?

Ashley Gefen practices at 1919 E Thomas Rd, Phoenix, AZ 85016. The listed phone number is (602) 933-0965.

What is Ashley Gefen's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Nephrology, with taxonomy code 2080P0210X.

Is Ashley Gefen enrolled in Medicare?

Yes. Ashley Gefen 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 Ashley Gefen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ashley Gefen reassigns Medicare benefits to 3 organizations: Phoenix Children's Hospital (Phoenix, AZ), Faculty Physicians And Surgeons Of Llusm (Indio, CA) and Children's Hospital Los Angeles 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 Ashley Gefen'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 Ashley Gefen was last updated on August 29, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.