Dr. Matthew Douglas Greer, MD
- Medicare services, 2024
- 1,102
- Medicare patients, 2024
- 149
- Part D claims, 2024
- 105
- MIPS score, 2024
- 93
- Hospital affiliations
- 3
- Practice address
- 1200 North Beaver Street, Flagstaff, AZ 86001
- Practice phone
- Call (928) 779-3366
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Greer's professional email, personal email and mobile number
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Dr. Matthew Douglas Greer is a radiation oncologist in Flagstaff, Arizona
Dr. Greer practices at Flagstaff Medical Center in Flagstaff, Arizona, part of Northern Arizona Healthcare.
Dr. Greer's NPI, 1073045043, was assigned on March 29, 2017. Dr. Greer graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 2017. Dr. Greer holds Arizona license 64479.
- NPI
- 1073045043NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4880963065
- NPI enumeration date
- March 29, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (928) 779-3366
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Matthew Douglas Greer practices at Flagstaff Medical Center in Flagstaff, Arizona
Dr. Greer's primary practice is Flagstaff Medical Center, at 1200 North Beaver Street, Flagstaff, AZ 86001 in Coconino County. The practice phone is (928) 779-3366.
- Flagstaff Medical Center1200 North Beaver Street, Flagstaff, AZ 86001 · Coconino CountyPhone(928) 779-3366
Source: Dmand AI Affiliation Data
Dr. Matthew Douglas Greer is affiliated with 3 sites of care and 1 medical group
Dr. Greer's primary practice is Flagstaff Medical Center in Flagstaff, Arizona, part of Northern Arizona Healthcare. Dr. Greer is also affiliated with Verde Valley Medical Center. The medical group on file is Northern Arizona Healthcare. Dmand AI also links Dr. Greer to 1 more hospital, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Matthew Douglas Greer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greer practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Flagstaff Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Matthew Douglas Greer is one of 141 radiation oncologists in Arizona
Radiation oncology is Dr. Greer's primary specialty in the NPI Registry, under taxonomy code 2085R0001X. Dmand AI has Dr. Greer's licenses on file in 2 states: Arizona and Idaho.
Specialties and state licenses
- Radiation oncology, ArizonaPrimary
- Internal medicine, Idaho
Radiation oncologists near Dr. Greer
Counts of radiation oncologists 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. Matthew Douglas Greer billed Medicare for 1,102 services in 2024
CMS data shows 1,102 Medicare services from Dr. Greer across 12 procedure codes in 2024, for 149 Medicare patients. Medicare paid $75,561 for them.
Dr. Greer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 7392024: 1,02839%
- Office and hospital visits
- 2023: 452024: 7464%
- Other services
- 2023: 222024: 0100%
Where Dr. Greer's Medicare services took place, 2024
- In an office33330%
- In a facility76970%
Dr. Greer compared with the Arizona median for radiation oncologists, 2024
- Dr. Greer
- Arizona median
- Medicare services
- 1,102vs 2,07247% below
- Medicare patients
- 149vs 22835% below
- Part D claims
- 34vs 4423% below
Medians across 141 radiation oncologists in Arizona with Dmand AI profiles that report each measure.
Dr. Greer'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Greer and other radiation oncologists in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Matthew Douglas Greer treated 149 Medicare patients in 2024, average age 75
CMS counts 149 Medicare patients who saw Dr. Greer in 2024. The largest group is 65 to 74, with 66 patients. 65% of them have cancer, and 65% have high blood pressure. 13% are also on Medicaid. Their average risk score is 1.79, 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. Greer's median patient age at 72, with 42% women.
Dr. Greer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Greer's Medicare patients by sex, 2024
- Women5940%
- Men9060%
Chronic conditions among Dr. Greer's Medicare patients, 2024
- Cancer65%
- High blood pressure65%
- High cholesterol63%
- Arthritis38%
- Ischemic heart disease28%
- Diabetes26%
- COPD20%
- Chronic kidney disease20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Greer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women42%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Matthew Douglas Greer wrote 105 Medicare Part D claims in 2024
In 2024, Dr. Greer wrote 105 Medicare Part D claims for 44 patients. 86% of them were for generic drugs. CMS names the drug for 34 of them, across 3 drugs with 11 or more claims each, at $499 in total drug cost. In 2022, CMS named 17 claims across 1 drug.
Dr. Greer's Part D claims by kind of drug, 2024
- Generic90 claims86%
- Brand-name and other15 claims14%
Dr. Greer's most prescribed drugs by claims, 2024
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. Greer's Part D claims, 2024
- Opioids12%13 of 105 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, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 172024: 34100%
Drugs named by CMS: 3 in 2024, 1 in 2022.
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
Dr. Matthew Douglas Greer scored 93 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Dr. Greer for performance year 2024, reported through an alternative payment model (APM). Dr. Greer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Greer's MIPS scores, performance year 2024
- 93of 100Final score
- 74.6of 100Quality
- 99of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Matthew Douglas Greer received $1,809 in industry payments from 2021 to 2025
CMS Open Payments shows 56 general payments to Dr. Greer from 34 drug and device companies from 2021 to 2025. Food and beverage make up the largest share, 100% of the total. Boston Scientific Corporation paid the most, $229.
General payments to Dr. Greer by program year, 2021 to 2025
Companies that paid Dr. Greer the most, 2021 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Matthew Douglas Greer graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University
Dr. Greer graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 2017.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Matthew Douglas Greer'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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Matthew Douglas Greer
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. Matthew Douglas Greer's NPI number?
Dr. Matthew Douglas Greer's NPI number is 1073045043. It was assigned on March 29, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Matthew Douglas Greer?
Dr. Matthew Douglas Greer is a radiation oncologist in Flagstaff, Arizona. The primary specialty in the NPI Registry is Radiation Oncology Physician (taxonomy code 2085R0001X).
Where does Dr. Matthew Douglas Greer practice?
Dr. Greer practices at 1200 North Beaver Street, Flagstaff, AZ 86001. Dr. Greer's primary practice is Flagstaff Medical Center in Flagstaff, Arizona, part of Northern Arizona Healthcare. Dmand AI also links Dr. Greer to 1 hospital.
What is Dr. Matthew Douglas Greer's office phone number?
The practice phone on file for Dr. Greer is (928) 779-3366.
What is Dr. Matthew Douglas Greer's medical license number?
Dr. Greer holds Arizona license 64479, one of the licenses on file in 2 states.
Which states has Dr. Matthew Douglas Greer been licensed in?
Dmand AI has state licenses on file for Dr. Greer in Arizona and Idaho.
Which hospitals is Dr. Matthew Douglas Greer affiliated with?
Dr. Greer practices at Flagstaff Medical Center in Flagstaff, Arizona. Dr. Greer is also affiliated with Verde Valley Medical Center. Dmand AI links Dr. Greer to 1 more hospital.
What medical group is Dr. Matthew Douglas Greer part of?
Dr. Greer is linked to Northern Arizona Healthcare.
Does Dr. Matthew Douglas Greer accept Medicare?
Yes. CMS data shows Dr. Greer billed Medicare for 1,102 services in 2024, and Dr. Greer accepts Medicare assignment.
What is Dr. Matthew Douglas Greer's MIPS score?
Dr. Greer's MIPS final score for performance year 2024 is 93 out of 100, reported through an alternative payment model (APM).
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How many Medicare patients does Dr. Matthew Douglas Greer see?
CMS counts 149 Medicare patients who saw Dr. Greer in 2024, with an average age of 75.
What services does Dr. Matthew Douglas Greer bill to Medicare?
In 2024, Dr. Greer's most billed Medicare services were radiation oncology (77014), radiation oncology (77300) and radiation oncology (77427).
Where did Dr. Matthew Douglas Greer go to medical school?
Dr. Greer graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 2017.
What drugs does Dr. Matthew Douglas Greer prescribe most?
In 2024 Medicare Part D data, Dr. Greer's most prescribed drugs by claims were Dexamethasone, Lidocaine HCl Viscous and Ssd.
Has Dr. Matthew Douglas Greer received payments from drug or device companies?
CMS Open Payments shows $1,809 in general payments to Dr. Greer from 34 companies from 2021 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. Matthew Douglas Greer been practicing?
Dr. Greer graduated from medical school in 2017, 9 years ago.
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