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GREGORY ALAN GREENBAUM M.D
NPI 1982654067
Emergency Medicine in Sun City, AZ

Active since May 11, 2006PECOS Enrolled
76.13/100
CMS Quality Rating
10401 WEST THUNDERBIRD BLVD., SUN CITY, AZ 85351(623) 977-7211 Get Directions Write a Review

NPPES record last updated: January 30, 2008. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Gregory Alan Greenbaum M.d NPPES

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

GREGORY ALAN GREENBAUM M.D (NPI 1982654067) is an individual emergency medicine provider in Sun City, Arizona, licensed in Arizona (35417) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1982654067
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameGREGORY ALAN GREENBAUMCredential: M.D
Location Address10401 WEST THUNDERBIRD BLVD.Sun City, AZ 85351
Mailing Address2100 Powell Street, Ste 920Emeryville, CA 94608 · (510) 350-2600
Phone(623) 977-7211
Sole ProprietorNo
Enumeration DateMay 11, 2006
Last NPPES UpdateJanuary 30, 2008
✔ NPI 1982654067 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in AZ · 35417
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
10401 WEST THUNDERBIRD BLVD., Sun City, AZ 85351
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Other Identifiers 3

Medicare PINZ110376AZ
Medicare UPINF05417AZ
Medicaid114277AZ

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health Plan, Inc..Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gregory Alan Greenbaum M.d is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Greenbaum reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cep America-Arizona, PC
Same address
Emergency Medicine
10401 W THUNDERBIRD BLVD
Sun City, AZ 85351
  • Reassigned Medicare billing, Arizona enrollment
  • 174 clinicians in this Medicare group
NPI 1124491477 (623) 823-4000
Banner Hospital Based Physicians Arizona LLC
36 mi
Multi-Specialty
1900 N HIGLEY RD
Gilbert, AZ 85234
  • Reassigned Medicare billing, Arizona enrollment
  • 1,081 clinicians in this Medicare group
NPI 1124374822 (480) 543-2034

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85351 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
$85.89 typical visit price
range $55.44 – $168.60
Typical copayment $21.47 (range $13.86 – $42.15)
Most-billed visit code 99203
Established Patient
$98.00 typical visit price
range $17.72 – $137.41
Typical copayment $24.50 (range $4.43 – $34.35)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

76.13/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality69.43
Improvement Activities40

Other Providers at the Same Location NPPES 3

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

SCOTT DAVID LOPATA M.D
Emergency Medicine
10401 WEST THUNDERBIRD BLVD.
SUN CITY, AZ 85351
Maricopa County (623) 977-7211
JOEL ALAN GROSS M.D
Emergency Medicine
10401 WEST THUNDERBIRD BLVD.
SUN CITY, AZ 85351
Maricopa County (623) 977-7211
ELLEN ANN LENG M.D
Emergency Medicine
10401 WEST THUNDERBIRD BLVD.
SUN CITY, AZ 85351
Maricopa County (623) 977-7211

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 Greenbaum's NPI number?

The NPI number for Gregory Greenbaum is 1982654067. It was assigned to this individual provider in the NPPES registry on May 11, 2006.

Where is Gregory Greenbaum located?

Gregory Greenbaum practices at 10401 West Thunderbird Blvd., Sun City, AZ 85351. The listed phone number is (623) 977-7211.

What is Gregory Greenbaum's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Gregory Greenbaum enrolled in Medicare?

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

Which organizations bill Medicare for Gregory Greenbaum's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Greenbaum reassigns Medicare benefits to 2 organizations: Cep America-Arizona, PC (Sun City, AZ) and Banner Hospital Based Physicians Arizona LLC (Gilbert, 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 Greenbaum's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Greenbaum accept?

Health plans from Oscar Health Plan, Inc. list Gregory Greenbaum 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 Gregory Greenbaum was last updated on January 30, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.