Gregory Alan Greenbaum, M.D
Emergency Medicine Physician · Sun City, AZ
Gregory Alan Greenbaum, M.D is an emergency medicine physician with a practice address in Sun City, Arizona, and NPI 1982654067, issued on May 11, 2006. Check the license (Arizona 35417, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory Alan Greenbaum
- Credential
- M.D
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 35417 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 10401 West Thunderbird Blvd., Sun City, AZ 85351
- Phone
- (623) 977-7211
- Enumerated
- May 11, 2006
- Record last updated
- Jan 30, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicaid ID
- 114277 AZ
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,494 in Arizona → Look up another NPI →
Also registered at 10401 West Thunderbird Blvd.
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joel Gross, M.DEmergency Medicine Physician1790735876
- Ellen Leng, M.DEmergency Medicine Physician1902855497
- Scott Lopata, M.DEmergency Medicine Physician1356390843
Verify Gregory Alan Greenbaum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 35417Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 76.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Gregory Alan Greenbaum among 1,494 emergency medicine physician records in Arizona
Gregory Alan Greenbaum, M.D is one of 1,494 emergency medicine physician records with a practice address in Arizona. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 62% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 55% of these records are
- Record last updated2008 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 emergency medicine physician records list a practice address in Sun City
They are 22 of the 813 NPPES records with a practice address in Sun City, and 1,494 emergency medicine physician records in Arizona.
All 1,494 in Arizona → Every provider in Sun City → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Robert Fitzgerald, M.DSun City, AZ 853511790735751
- Howard Friedman, M.DSun City, AZ 853511942259700
- Joel Gross, M.DSun City, AZ 853511790735876
- Raymond Hemmert, D.OSun City, AZ 853511013946870
- Heidi Holland, D.OSun City, AZ 853511134179179
- Peter Hull, M.DSun City, AZ 853511255384640
- Ellen Leng, M.DSun City, AZ 853511902855497
- John Loewen, M.DSun City, AZ 853511760435960
Common questions
What is Gregory Alan Greenbaum, M.D's NPI number?
Gregory Alan Greenbaum, M.D's National Provider Identifier (NPI) is 1982654067, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Alan Greenbaum, M.D located?
The NPPES record lists a practice address at 10401 West Thunderbird Blvd., Sun City, AZ, 85351. Phone: (623) 977-7211. Providers update this record themselves, so call before visiting.
How can I verify Gregory Alan Greenbaum, M.D's license?
NPPES lists Arizona license number 35417, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Gregory Alan Greenbaum, M.D's MIPS final score?
The 2023 MIPS final score is 76.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.