Dr. Mary G. Mezher, DO
- Medicare services, 2024
- 479
- Medicare patients, 2024
- 266
- Part D claims, 2024
- 118
- MIPS score, 2024
- 100
- Hospital affiliations
- 3
- Practice address
- 1700 Clinton Street, Muskegon, MI 49443
- Practice phone
- Call (231) 728-4007
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Hackley Hospital - Unit
Acute Care Hospital-Unit · Muskegon, Michigan
Find Dr. Mezher's professional email, personal email and mobile number
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Dr. Mary G. Mezher is an internist in Muskegon, Michigan
Dr. Mezher practices at Hackley Hospital - Unit in Muskegon, Michigan.
Dr. Mezher's NPI, 1124686365, was assigned on June 3, 2019. Dr. Mezher holds Michigan license 5101026939.
- NPI
- 1124686365NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426430752
- NPI enumeration date
- June 3, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (231) 728-4007
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mary G. Mezher practices at Hackley Hospital - Unit in Muskegon, Michigan
Dr. Mezher's primary practice is Hackley Hospital - Unit, at 1700 Clinton Street, Muskegon, MI 49443 in Muskegon County. The practice phone is (231) 728-4007.
- Hackley Hospital - Unit1700 Clinton Street, Muskegon, MI 49443 · Muskegon CountyPhone(231) 728-4007
Source: Dmand AI Affiliation Data
Dr. Mary G. Mezher is affiliated with 3 sites of care and 1 medical group
Dr. Mezher's primary practice is Hackley Hospital - Unit in Muskegon, Michigan. Dr. Mezher is also affiliated with Trinity Health Muskegon Hospital. The medical group on file is Trinity Health Medical Group. Dmand AI also links Dr. Mezher to 1 more hospital, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mary G. Mezher's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mezher practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hackley Hospital - Unit | 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. Mary G. Mezher is one of 4,804 internists in Michigan
Internal medicine is Dr. Mezher's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Mezher is licensed in Michigan.
Specialties and state licenses
- Internal medicine, MichiganPrimary
Internists near Dr. Mezher
Counts of internists 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. Mary G. Mezher billed Medicare for 479 services in 2024
CMS data shows 479 Medicare services from Dr. Mezher across 5 procedure codes in 2024, for 266 Medicare patients. Medicare paid $34,909 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Mezher's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5682024: 47916%
Dr. Mezher compared with the Michigan median for internists, 2024
- Dr. Mezher
- Michigan median
- Medicare services
- 479vs 42313% above
- Medicare patients
- 266vs 15967% above
- Part D claims
- 13vs 31496% below
Medians across 4,524 internists in Michigan with Dmand AI profiles that report each measure.
Dr. Mezher'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. Mezher and other internists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mary G. Mezher treated 266 Medicare patients in 2024, average age 75
CMS counts 266 Medicare patients who saw Dr. Mezher in 2024. The largest group is 75 to 84, with 96 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 32% are also on Medicaid. Their average risk score is 2.39, 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. Mezher's median patient age at 74, with 49% women.
Dr. Mezher's Medicare patients by age, 2024
Dr. Mezher's Medicare patients by sex, 2024
- Women14454%
- Men12246%
Chronic conditions among Dr. Mezher's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis60%
- Heart failure56%
- Mood disorders51%
- Chronic kidney disease49%
- Depression48%
- Anxiety46%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mezher's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women49%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mary G. Mezher wrote 118 Medicare Part D claims in 2024
In 2024, Dr. Mezher wrote 118 Medicare Part D claims for 64 patients. 89% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $100 in total drug cost. In 2023, CMS named 53 claims across 4 drugs.
Dr. Mezher's Part D claims by kind of drug, 2024
- Generic105 claims89%
- Brand-name13 claims11%
Dr. Mezher'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. Mezher's Part D claims, 2024
- Antibiotics20%24 of 118 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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 532024: 1375%
Drugs named by CMS: 1 in 2024, 4 in 2023.
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. Mary G. Mezher scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Mezher for performance year 2024, reported as part of a group. Dr. Mezher accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Mezher's MIPS scores, performance year 2024
- 100of 100Final score
- 97.1of 100Quality
- 40of 100Improvement Activities
- 74of 100Cost
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. Mary G. Mezher received $737 in industry payments from 2021 to 2025
CMS Open Payments shows 14 general payments to Dr. Mezher from 11 drug and device companies from 2021 to 2025. Food and beverage make up the largest share, 100% of the total. Biohaven Pharmaceuticals, Inc. paid the most, $235.
General payments to Dr. Mezher by program year, 2021 to 2025
Companies that paid Dr. Mezher the most, 2021 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mary G. Mezher'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 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) |
| 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. Mary G. Mezher
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. Mary G. Mezher's NPI number?
Dr. Mary G. Mezher's NPI number is 1124686365. It was assigned on June 3, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Mary G. Mezher?
Dr. Mary G. Mezher is an internist in Muskegon, Michigan. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Mary G. Mezher practice?
Dr. Mezher practices at 1700 Clinton Street, Muskegon, MI 49443. Dr. Mezher's primary practice is Hackley Hospital - Unit in Muskegon, Michigan. Dmand AI also links Dr. Mezher to 1 hospital.
What is Dr. Mary G. Mezher's office phone number?
The practice phone on file for Dr. Mezher is (231) 728-4007.
What is Dr. Mary G. Mezher's medical license number?
Dr. Mezher holds Michigan license 5101026939.
Which hospitals is Dr. Mary G. Mezher affiliated with?
Dr. Mezher is affiliated with Trinity Health Muskegon Hospital. Dmand AI links Dr. Mezher to 2 more hospitals.
What medical group is Dr. Mary G. Mezher part of?
Dr. Mezher is linked to Trinity Health Medical Group.
Does Dr. Mary G. Mezher accept Medicare?
Yes. CMS data shows Dr. Mezher billed Medicare for 479 services in 2024, and Dr. Mezher accepts Medicare assignment.
What is Dr. Mary G. Mezher's MIPS score?
Dr. Mezher's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
How many Medicare patients does Dr. Mary G. Mezher see?
CMS counts 266 Medicare patients who saw Dr. Mezher in 2024, with an average age of 75.
Show 4 more questionsShow fewer questions
What services does Dr. Mary G. Mezher bill to Medicare?
In 2024, Dr. Mezher's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99223) and hospital inpatient care (99222).
What drugs does Dr. Mary G. Mezher prescribe most?
In 2024 Medicare Part D data, Dr. Mezher's most prescribed drugs by claims were Metoprolol Succinate.
Has Dr. Mary G. Mezher received payments from drug or device companies?
CMS Open Payments shows $737 in general payments to Dr. Mezher from 11 companies from 2021 to 2025. The largest total came from Biohaven Pharmaceuticals, Inc.
How long has Dr. Mary G. Mezher been practicing?
Dr. Mezher graduated from medical school in 2019, 7 years ago.
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