Gregory Massoud, D.O.
Emergency Medicine Physician · Chandler, AZ
Gregory Massoud, D.O. is an emergency medicine physician with a practice address in Chandler, Arizona, and NPI 1790715522, issued on Jul 4, 2006. Check the license (Arizona 4023, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory Massoud
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 4023 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 475 S Dobson RD, Chandler, AZ 85224
- Phone
- (480) 728-3753
- Enumerated
- Jul 4, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (480) 728-3305
- Medicare enrollment
- Enrolled (PECOS I20040727001303); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,494 in Arizona → Look up another NPI →
Also registered at 475 S Dobson RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Gregory Berman, M.D.Emergency Medicine Physician1184670317
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- Carol Brennan, PA-CMedical Physician Assistant1003895426
Verify Gregory Massoud in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 4023Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average emergency medicine physician in 2024
75 Medicare Part D claims for 59 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 3 group practices
- Emergency Professional Services PCSan Tan Valley, AZ
- Tec Emergency Physicians OF Arizona, LLCGilbert, AZ
- Usacs Emergency Medicine OF Arizona LLCMesa, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Massoud among 1,494 emergency medicine physician records in Arizona
Gregory Massoud, D.O. 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 fileYes · 55% of these records are
- Graduated2000 · median 2014 among the 828 with a school on file
- Record last updated2007 · 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).
Emergency Medicine Physician providers in Arizona
There are 1,494 emergency medicine physician records in Arizona.
All 1,494 in Arizona → Every provider in Chandler → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Gregory Berman, M.D.Chandler, AZ 852241184670317
- Todd Davis, D.O.Chandler, AZ 852241457307282
- Robert Laney, M.D.Chandler, AZ 852241447233168
- Evan Leibner, M.D.Chandler, AZ 852241699712299
- John Linder, M.D.Chandler, AZ 852241467408203
- Erik Mattison, M.D.Chandler, AZ 852241639116668
- Paul McHale, M.D.Chandler, AZ 852241215974258
- Judy Messer, M.D.Chandler, AZ 852241407800980
Common questions
What is Gregory Massoud, D.O.'s NPI number?
Gregory Massoud, D.O.'s National Provider Identifier (NPI) is 1790715522, issued on Jul 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Massoud, D.O. located?
The NPPES record lists a practice address at 475 S Dobson RD, Chandler, AZ, 85224. Phone: (480) 728-3753. Providers update this record themselves, so call before visiting.
How can I verify Gregory Massoud, D.O.'s license?
NPPES lists Arizona license number 4023, 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.
How much does Gregory Massoud, D.O. prescribe under Medicare Part D?
In 2024, Gregory Massoud, D.O. had 75 Medicare Part D claims for 59 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.