Dr. Gregory J. Massoud, DO
- Medicare services, 2024
- 676
- Medicare patients, 2024
- 490
- Part D claims, 2024
- 75
- Hospital affiliations
- 4
- Industry payments
- $18
- Practice address
- 1955 West Frye Road, Chandler, AZ 85224
- Practice phone
- Call (480) 728-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Massoud's professional email, personal email and mobile number
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Dr. Gregory J. Massoud is an emergency medicine physician in Chandler, Arizona
Dr. Massoud practices at Dignity Health Chandler Regional Medical Center in Chandler, Arizona, part of CommonSpirit Health.
Dr. Massoud's NPI, 1790715522, was assigned on July 4, 2006. Dr. Massoud holds Arizona license 4023.
- NPI
- 1790715522NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5698745701
- NPI enumeration date
- July 4, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (480) 728-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory J. Massoud practices at Dignity Health Chandler Regional Medical Center in Chandler, Arizona
Dr. Massoud's primary practice is Dignity Health Chandler Regional Medical Center, at 1955 West Frye Road, Chandler, AZ 85224 in Maricopa County. The practice phone is (480) 728-3000.
- Dignity Health Chandler Regional Medical Center1955 West Frye Road, Chandler, AZ 85224 · Maricopa CountyPhone(480) 728-3000
Source: Dmand AI Affiliation Data
Dr. Gregory J. Massoud is affiliated with 7 sites of care and 4 medical groups
Dr. Massoud's primary practice is Dignity Health Chandler Regional Medical Center in Chandler, Arizona, part of CommonSpirit Health. Dr. Massoud is also affiliated with Dignity Health Mercy Gilbert Medical Center. The medical group on file is Premier Emergency Medical Specialists. Dmand AI also links Dr. Massoud to 2 more hospitals, 3 group practices and clinics and 3 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory J. Massoud's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Massoud practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health Chandler Regional Medical Center | Available with a free account |
| +6 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory J. Massoud is one of 1,360 emergency medicine physicians in Arizona
Emergency medicine is Dr. Massoud's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Massoud is licensed in Arizona.
Specialties and state licenses
- Emergency medicine, ArizonaPrimary
Emergency medicine physicians near Dr. Massoud
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory J. Massoud billed Medicare for 676 services in 2024
CMS data shows 676 Medicare services from Dr. Massoud across 4 procedure codes in 2024, for 490 Medicare patients. Medicare paid $63,063 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Massoud's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4512024: 4837%
- Tests and treatments
- 2023: 282024: 193589%
Dr. Massoud compared with the Arizona median for emergency medicine physicians, 2024
- Dr. Massoud
- Arizona median
- Medicare services
- 676vs 2163.1 times
- Medicare patients
- 490vs 2102.3 times
- Part D claims
- 14vs 5072% below
Medians across 1,326 emergency medicine physicians in Arizona with Dmand AI profiles that report each measure.
Dr. Massoud's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory J. Massoud treated 490 Medicare patients in 2024, average age 77
CMS counts 490 Medicare patients who saw Dr. Massoud in 2024. The largest group is 75 to 84, with 223 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 9% are also on Medicaid. Their average risk score is 2.20, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Massoud's median patient age at 57, with 55% women.
Dr. Massoud's Medicare patients by age, 2024
Dr. Massoud's Medicare patients by sex, 2024
- Women25953%
- Men23147%
Chronic conditions among Dr. Massoud's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis62%
- Ischemic heart disease54%
- Chronic kidney disease45%
- Diabetes42%
- Atrial fibrillation40%
- Mood disorders40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Massoud's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women55%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory J. Massoud wrote 75 Medicare Part D claims in 2024
In 2024, Dr. Massoud wrote 75 Medicare Part D claims for 59 patients. 97% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $134 in total drug cost. In 2017, CMS named 28 claims across 2 drugs.
Dr. Massoud's Part D claims by kind of drug, 2024
- Generic73 claims97%
- Brand-name and other2 claims3%
Dr. Massoud's most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Massoud's Part D claims, 2024
- Antibiotics27%20 of 75 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2017 to 2021
- 2017
- 2021
- Claims for drugs CMS names
- 2017: 282021: 1450%
Drugs named by CMS: 1 in 2021, 2 in 2017.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Gregory J. Massoud takes part in Medicare
Dr. Massoud accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Gregory J. Massoud received $18 in industry payments in 2020
CMS Open Payments shows 1 general payment to Dr. Massoud from 1 drug or device company in 2020. Food and beverage make up the largest share, 100% of the total. CSL Behring paid the most, $18.
Companies that paid Dr. Massoud the most, 2020 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Gregory J. Massoud's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory J. Massoud
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory J. Massoud's NPI number?
Dr. Gregory J. Massoud's NPI number is 1790715522. It was assigned on July 4, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory J. Massoud?
Dr. Gregory J. Massoud is an emergency medicine physician in Chandler, Arizona. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Gregory J. Massoud practice?
Dr. Massoud practices at 1955 West Frye Road, Chandler, AZ 85224. Dr. Massoud's primary practice is Dignity Health Chandler Regional Medical Center in Chandler, Arizona, part of CommonSpirit Health. Dmand AI also links Dr. Massoud to 2 hospitals, 3 group practices and clinics and 3 medical groups.
What is Dr. Gregory J. Massoud's office phone number?
The practice phone on file for Dr. Massoud is (480) 728-3000.
What is Dr. Gregory J. Massoud's medical license number?
Dr. Massoud holds Arizona license 4023.
Which hospitals is Dr. Gregory J. Massoud affiliated with?
Dr. Massoud practices at Dignity Health Chandler Regional Medical Center in Chandler, Arizona. Dr. Massoud is also affiliated with Dignity Health Mercy Gilbert Medical Center. Dmand AI links Dr. Massoud to 2 more hospitals.
What medical group is Dr. Gregory J. Massoud part of?
Dr. Massoud is linked to Premier Emergency Medical Specialists. Dmand AI links Dr. Massoud to 3 more medical groups.
Does Dr. Gregory J. Massoud accept Medicare?
Yes. CMS data shows Dr. Massoud billed Medicare for 676 services in 2024, and Dr. Massoud accepts Medicare assignment.
How many Medicare patients does Dr. Gregory J. Massoud see?
CMS counts 490 Medicare patients who saw Dr. Massoud in 2024, with an average age of 77.
What services does Dr. Gregory J. Massoud bill to Medicare?
In 2024, Dr. Massoud's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and emergency department visit (99284).
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What drugs does Dr. Gregory J. Massoud prescribe most?
In 2021 Medicare Part D data, Dr. Massoud's most prescribed drugs by claims were Cefdinir.
Has Dr. Gregory J. Massoud received payments from drug or device companies?
CMS Open Payments shows $18 in general payments to Dr. Massoud from 1 company from 2020 to 2020. The largest total came from CSL Behring.
How long has Dr. Gregory J. Massoud been practicing?
Dr. Massoud graduated from medical school in 2000, 26 years ago.
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