Dr. Gary N. Mason, DO
- Medicare services, 2024
- 75
- Medicare patients, 2024
- 58
- MIPS score, 2024
- 75
- Hospital affiliations
- 2
- Industry payments
- $196
- Practice address
- 100 Michigan St NE, Grand Rapids, MI 49503
- Practice phone
- Call (616) 391-1774
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Mason's professional email, personal email and mobile number
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Dr. Gary N. Mason is an anesthesiologist in Grand Rapids, Michigan
Dr. Mason practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health.
Dr. Mason's NPI, 1043345648, was assigned on February 22, 2007. Dr. Mason graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 1994. Dr. Mason holds Michigan license 5101012461.
- NPI
- 1043345648NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739220179
- NPI enumeration date
- February 22, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (616) 391-1774
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gary N. Mason practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan
Dr. Mason's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth, at 100 Michigan St NE, Grand Rapids, MI 49503 in Kent County. The practice phone is (616) 391-1774.
- Corewell Health Grand Rapids Hospitals - Butterworth100 Michigan St NE, Grand Rapids, MI 49503 · Kent CountyPhone(616) 391-1774
Source: Dmand AI Affiliation Data
Dr. Gary N. Mason is affiliated with 3 sites of care and 3 medical groups
Dr. Mason's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health. Dr. Mason is also affiliated with Henry Ford St. John Hospital. The medical group on file is Corewell Health Medical Group West. Dmand AI also links Dr. Mason to 2 more medical groups and 1 group practice or clinic, 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. Gary N. Mason's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mason practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Corewell Health Grand Rapids Hospitals - Butterworth | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gary N. Mason is one of 1,302 anesthesiologists in Michigan
Anesthesiology is Dr. Mason's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Mason is licensed in Michigan.
Specialties and state licenses
- Anesthesiology, MichiganPrimary
Anesthesiologists near Dr. Mason
Counts of anesthesiologists 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. Gary N. Mason billed Medicare for 75 services in 2024
CMS data shows 75 Medicare services from Dr. Mason across 4 procedure codes in 2024, for 58 Medicare patients. Medicare paid $2,163 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Mason's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 152024: 44193%
- Imaging
- 2023: 02024: 31
- Anesthesia
- 2023: 1192024: 0100%
Dr. Mason compared with the Michigan median for anesthesiologists, 2024
- Dr. Mason
- Michigan median
- Medicare services
- 75vs 8916% below
- Medicare patients
- 58vs 17767% below
Medians across 1,283 anesthesiologists in Michigan with Dmand AI profiles that report each measure.
Dr. Mason'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. Mason and other anesthesiologists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gary N. Mason treated 58 Medicare patients in 2024, average age 72
CMS counts 58 Medicare patients who saw Dr. Mason in 2024. The largest group is 65 to 74, with 32 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.38, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Mason's median patient age at 59, with 62% women.
Dr. Mason's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mason's Medicare patients by sex, 2024
- Women2441%
- Men3459%
Chronic conditions among Dr. Mason's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis62%
- Ischemic heart disease50%
- Atrial fibrillation45%
- Anxiety41%
- Heart failure36%
- Diabetes34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mason's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women62%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gary N. Mason scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Mason for performance year 2024, reported as part of a group. Dr. Mason accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Mason's MIPS scores, performance year 2024
- 75of 100Final score
- 70of 100Quality
- 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. Gary N. Mason received $196 in industry payments from 2016 to 2025
CMS Open Payments shows 13 general payments to Dr. Mason from 2 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $176.
General payments to Dr. Mason by program year, 2016 to 2025
Companies that paid Dr. Mason the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gary N. Mason graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville
Dr. Mason graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gary N. Mason'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) |
| 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. Gary N. Mason
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. Gary N. Mason's NPI number?
Dr. Gary N. Mason's NPI number is 1043345648. It was assigned on February 22, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary N. Mason?
Dr. Gary N. Mason is an anesthesiologist in Grand Rapids, Michigan. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Gary N. Mason practice?
Dr. Mason practices at 100 Michigan St NE, Grand Rapids, MI 49503. Dr. Mason's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health. Dmand AI also links Dr. Mason to 2 medical groups and 1 group practice or clinic.
What is Dr. Gary N. Mason's office phone number?
The practice phone on file for Dr. Mason is (616) 391-1774.
What is Dr. Gary N. Mason's medical license number?
Dr. Mason holds Michigan license 5101012461.
Which hospitals is Dr. Gary N. Mason affiliated with?
Dr. Mason practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan. Dr. Mason is also affiliated with Henry Ford St. John Hospital.
What medical group is Dr. Gary N. Mason part of?
Dr. Mason is linked to Corewell Health Medical Group West. Dmand AI links Dr. Mason to 2 more medical groups.
Does Dr. Gary N. Mason accept Medicare?
Yes. CMS data shows Dr. Mason billed Medicare for 75 services in 2024, and Dr. Mason accepts Medicare assignment.
What is Dr. Gary N. Mason's MIPS score?
Dr. Mason's MIPS final score for performance year 2024 is 75 out of 100, reported as part of a group.
How many Medicare patients does Dr. Gary N. Mason see?
CMS counts 58 Medicare patients who saw Dr. Mason in 2024, with an average age of 72.
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What services does Dr. Gary N. Mason bill to Medicare?
In 2024, Dr. Mason's most billed Medicare services were surgery: heart and blood vessels (36620), ultrasound (76937) and surgery: brain, spine and nerves (64447).
Where did Dr. Gary N. Mason go to medical school?
Dr. Mason graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 1994.
Has Dr. Gary N. Mason received payments from drug or device companies?
CMS Open Payments shows $196 in general payments to Dr. Mason from 2 companies from 2016 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Gary N. Mason been practicing?
Dr. Mason graduated from medical school in 1994, 32 years ago.
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