Dr. Gregory Olivier Mathelier, MD
- Medicare services, 2024
- 605
- Medicare patients, 2024
- 391
- Part D claims, 2024
- 126
- MIPS score, 2024
- 81
- Hospital affiliations
- 2
- Practice address
- 400 West Seventh St, Frederick, MD 21701
- Practice phone
- Call (240) 566-3300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mathelier's professional email, personal email and mobile number
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Dr. Gregory Olivier Mathelier is an emergency medicine physician in Frederick, Maryland
Dr. Mathelier practices at Frederick Health Hospital in Frederick, Maryland, part of Frederick Health.
Dr. Mathelier's NPI, 1386227577, was assigned on May 4, 2021. Dr. Mathelier graduated from Howard University College of Medicine in 2021. Dr. Mathelier holds Maryland license D98944.
- NPI
- 1386227577NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103222690
- NPI enumeration date
- May 4, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (240) 566-3300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory Olivier Mathelier practices at Frederick Health Hospital in Frederick, Maryland
Dr. Mathelier's primary practice is Frederick Health Hospital, at 400 West Seventh St, Frederick, MD 21701 in Frederick County. The practice phone is (240) 566-3300.
- Frederick Health Hospital400 West Seventh St, Frederick, MD 21701 · Frederick CountyPhone(240) 566-3300
Source: Dmand AI Affiliation Data
Dr. Gregory Olivier Mathelier is affiliated with 2 sites of care and 2 medical groups
Dr. Mathelier's primary practice is Frederick Health Hospital in Frederick, Maryland, part of Frederick Health. Dr. Mathelier is also affiliated with Select Specialty Hospital - Pittsburgh / UPMC. The medical group on file is Hospitalist Medicine Physicians of Maryland PC. Dmand AI also links Dr. Mathelier to 1 more medical group, 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 Olivier Mathelier's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mathelier practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Frederick Health Hospital | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory Olivier Mathelier is one of 1,057 emergency medicine physicians in Maryland
Emergency medicine is Dr. Mathelier's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Mathelier is licensed in Maryland.
Specialties and state licenses
- Emergency medicine, MarylandPrimary
Emergency medicine physicians near Dr. Mathelier
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 Olivier Mathelier billed Medicare for 605 services in 2024
CMS data shows 605 Medicare services from Dr. Mathelier across 4 procedure codes in 2024, for 391 Medicare patients. Medicare paid $56,168 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Mathelier's Medicare services by type, 2024
- Office and hospital visits392
- Tests and treatments213
Dr. Mathelier compared with the Maryland median for emergency medicine physicians, 2024
- Dr. Mathelier
- Maryland median
- Medicare services
- 605vs 3002.0 times
- Medicare patients
- 391vs 29234% above
- Part D claims
- 15vs 4466% below
Medians across 1,040 emergency medicine physicians in Maryland with Dmand AI profiles that report each measure.
Dr. Mathelier'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. Mathelier and other emergency medicine physicians in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory Olivier Mathelier treated 391 Medicare patients in 2024, average age 77
CMS counts 391 Medicare patients who saw Dr. Mathelier in 2024. The largest group is 75 to 84, with 147 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 2.17, 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. Mathelier's median patient age at 57, with 55% women.
Dr. Mathelier's Medicare patients by age, 2024
Dr. Mathelier's Medicare patients by sex, 2024
- Women21154%
- Men18046%
Chronic conditions among Dr. Mathelier's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis62%
- Ischemic heart disease53%
- Diabetes44%
- Mood disorders42%
- Atrial fibrillation41%
- Anxiety38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mathelier'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%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory Olivier Mathelier wrote 126 Medicare Part D claims in 2024
In 2024, Dr. Mathelier wrote 126 Medicare Part D claims for 102 patients. 97% of them were for generic drugs. CMS names the drug for 15 of them, across 1 drug with 11 or more claims each, at $96 in total drug cost.
Dr. Mathelier's Part D claims by kind of drug, 2024
- Generic122 claims97%
- Brand-name and other4 claims3%
Dr. Mathelier'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. Mathelier's Part D claims, 2024
- Antibiotics37%46 of 126 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. Gregory Olivier Mathelier scored 81 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 81 out of 100 for Dr. Mathelier for performance year 2024, reported as part of a group. Dr. Mathelier accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Mathelier's MIPS scores, performance year 2024
- 81of 100Final score
- 61.9of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 75of 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. Gregory Olivier Mathelier received $14 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Mathelier from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $14.
Companies that paid Dr. Mathelier the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory Olivier Mathelier graduated from Howard University College of Medicine
Dr. Mathelier graduated from Howard University College of Medicine in 2021.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory Olivier Mathelier'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. Gregory Olivier Mathelier
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 Olivier Mathelier's NPI number?
Dr. Gregory Olivier Mathelier's NPI number is 1386227577. It was assigned on May 4, 2021, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Olivier Mathelier?
Dr. Gregory Olivier Mathelier is an emergency medicine physician in Frederick, Maryland. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Gregory Olivier Mathelier practice?
Dr. Mathelier practices at 400 West Seventh St, Frederick, MD 21701. Dr. Mathelier's primary practice is Frederick Health Hospital in Frederick, Maryland, part of Frederick Health. Dmand AI also links Dr. Mathelier to 1 medical group.
What is Dr. Gregory Olivier Mathelier's office phone number?
The practice phone on file for Dr. Mathelier is (240) 566-3300.
What is Dr. Gregory Olivier Mathelier's medical license number?
Dr. Mathelier holds Maryland license D98944.
Which hospitals is Dr. Gregory Olivier Mathelier affiliated with?
Dr. Mathelier practices at Frederick Health Hospital in Frederick, Maryland. Dr. Mathelier is also affiliated with Select Specialty Hospital - Pittsburgh / UPMC.
What medical group is Dr. Gregory Olivier Mathelier part of?
Dr. Mathelier is linked to Hospitalist Medicine Physicians of Maryland PC. Dmand AI links Dr. Mathelier to 1 more medical group.
Does Dr. Gregory Olivier Mathelier accept Medicare?
Yes. CMS data shows Dr. Mathelier billed Medicare for 605 services in 2024, and Dr. Mathelier accepts Medicare assignment.
What is Dr. Gregory Olivier Mathelier's MIPS score?
Dr. Mathelier's MIPS final score for performance year 2024 is 81 out of 100, reported as part of a group.
How many Medicare patients does Dr. Gregory Olivier Mathelier see?
CMS counts 391 Medicare patients who saw Dr. Mathelier in 2024, with an average age of 77.
Show 5 more questionsShow fewer questions
What services does Dr. Gregory Olivier Mathelier bill to Medicare?
In 2024, Dr. Mathelier's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and critical care (99291).
Where did Dr. Gregory Olivier Mathelier go to medical school?
Dr. Mathelier graduated from Howard University College of Medicine in 2021.
What drugs does Dr. Gregory Olivier Mathelier prescribe most?
In 2024 Medicare Part D data, Dr. Mathelier's most prescribed drugs by claims were Ondansetron ODT.
Has Dr. Gregory Olivier Mathelier received payments from drug or device companies?
CMS Open Payments shows $14 in general payments to Dr. Mathelier from 1 company from 2025 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Gregory Olivier Mathelier been practicing?
Dr. Mathelier graduated from medical school in 2021, 5 years ago.
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