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DR. GREGORY CARL MARTIN M.D.
NPI 1184674053
Pediatrics - Neonatal-Perinatal Medicine in Gilbert, AZ

Active since May 11, 2006PECOS Enrolled
3420 S MERCY RD STE 205, GILBERT, AZ 85297(602) 933-6345(602) 933-8975 Get Directions Write a Review

NPPES record last updated: April 1, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 1, 2026, Jun 17, 2021 (2 updates tracked since 2021).

About Dr. Gregory Carl Martin M.d. NPPES

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

DR. GREGORY CARL MARTIN M.D. (NPI 1184674053) is an individual neonatal-perinatal medicine provider in Gilbert, Arizona, licensed in Arizona (37229) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Las Vegas, and is a graduate of New York University School Of Medicine (1998).

NPPES Registry Identity

NPI1184674053
Entity TypeIndividualMale
Primary Taxonomy2080N0001X
Provider Legal NameDR. GREGORY CARL MARTINCredential: M.D.
Location Address3420 S MERCY RD STE 205Gilbert, AZ 85297-0423
Mailing Address2108 E Thomas Rd Ste 130Phoenix, AZ 85016-0008 · (602) 933-3124
Phone(602) 933-6345
Fax(602) 933-8975
Sole ProprietorNo
Medical School CMSNew York University School Of MedicineGraduated 1998
Enumeration DateMay 11, 2006
Last NPPES UpdateApril 1, 20262 updates tracked since enumeration
NPPES CertifiedApril 1, 2026
✔ NPI 1184674053 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Neonatal-Perinatal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080N0001X
License✔ Licensed in AZ · 37229
Definition
A pediatrician who is the principal care provider for sick newborn infants. Clinical expertise is used for direct patient care and for consulting with obstetrical colleagues to plan for the care of mothers who have high-risk pregnancies.
3420 S MERCY RD STE 205, Gilbert, AZ 85297
Open in Google Maps ↗

Secondary Practice Location 1

Location 13196 S Maryland Pkwy, SUITE 217Las Vegas, NV 89109-2305 · Phone (702) 733-4944 · Fax (702) 733-6507

Other Identifiers 1

Medicaid859671AZ

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Gregory Carl Martin M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5991985723
PECOS Enrollment IDI20260421001157
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

2

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

Phoenix Children's Medical Group
7.5 mi
Multi-Specialty
5131 E SOUTHERN AVE
Mesa, AZ 85206
  • Reassigned Medicare billing, Arizona enrollment
  • Medicare enrollment name: Phoenix Children's Hospital
  • 1,416 clinicians in this Medicare group
NPI 1487814240 (602) 933-0002
Gila River Health Care Corporation
8.4 mi
Case Management
3042 W. QUEEN CREEK ROAD
Chandler, AZ 85286
  • Reassigned Medicare billing, Texas enrollment
  • 482 clinicians in this Medicare group
NPI 1629579230 (602) 528-1200

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 4

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

AMY NORTON DPT
Physical Therapist
3420 S MERCY RD STE 205
GILBERT, AZ 85297
Maricopa County (602) 933-3033
DR. KEVIN RYAN ELLSWORTH M.D.
Pediatrics (Neonatal-Perinatal Medicine)
3420 S MERCY RD STE 205
GILBERT, AZ 85297
Maricopa County (602) 933-6345
DAVID BENNETT
Orthopaedic Surgery (Pediatric Orthopaedic Surgery)
3420 S MERCY RD STE 205
GILBERT, AZ 85297
Maricopa County (602) 933-3033
MARC ANDREW ELLSWORTH MD
Pediatrics (Neonatal-Perinatal Medicine)
3420 S MERCY RD STE 205
GILBERT, AZ 85297
Maricopa County (602) 933-6345

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 Gregory Martin's NPI number?

The NPI number for Gregory Martin is 1184674053. It was assigned to this individual provider in the NPPES registry on May 11, 2006.

Where is Gregory Martin located?

Gregory Martin practices at 3420 S Mercy Rd Ste 205, Gilbert, AZ 85297. The listed phone number is (602) 933-6345.

What is Gregory Martin's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.

Is Gregory Martin enrolled in Medicare?

Yes. Gregory Martin is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gregory Martin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Martin reassigns Medicare benefits to 2 organizations: Phoenix Children's Medical Group (Mesa, AZ) and Gila River Health Care Corporation (Chandler, AZ). 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 Gregory Martin'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 Gregory Martin was last updated on April 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.