Dr. Jonathan Joseph Gammel, MD
- Medicare services, 2024
- 370
- Medicare patients, 2024
- 369
- Part D claims, 2024
- 155
- Hospital affiliations
- 2
- Medical groups
- 2
- Practice address
- 60 Hospital Road, Leominster, MA 01453
- Practice phone
- Call (978) 466-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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Dr. Jonathan Joseph Gammel is an emergency medicine physician in Leominster, Massachusetts
Dr. Gammel practices at UMass Memorial Health - HealthAlliance-Clinton Hospital in Leominster, Massachusetts, part of UMass Memorial Health Care.
Dr. Gammel's NPI, 1689163560, was assigned on May 6, 2018. Dr. Gammel graduated from University of Massachusetts Medical School in 2018. Dr. Gammel holds Massachusetts license 287536.
- NPI
- 1689163560NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4082969597
- NPI enumeration date
- May 6, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (978) 466-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jonathan Joseph Gammel practices at UMass Memorial Health - HealthAlliance-Clinton Hospital in Leominster, Massachusetts
Dr. Gammel's primary practice is UMass Memorial Health - HealthAlliance-Clinton Hospital, at 60 Hospital Road, Leominster, MA 01453 in Worcester County. The practice phone is (978) 466-2000.
- UMass Memorial Health - HealthAlliance-Clinton Hospital60 Hospital Road, Leominster, MA 01453 · Worcester CountyPhone(978) 466-2000
Source: Dmand AI Affiliation Data
Dr. Jonathan Joseph Gammel is affiliated with 2 sites of care and 2 medical groups
Dr. Gammel's primary practice is UMass Memorial Health - HealthAlliance-Clinton Hospital in Leominster, Massachusetts, part of UMass Memorial Health Care. Dr. Gammel is also affiliated with UMass Memorial Medical Center - University Campus. The medical group on file is UMass Memorial Medical Group. Dmand AI also links Dr. Gammel 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. Jonathan Joseph Gammel's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gammel practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UMass Memorial Health - HealthAlliance-Clinton 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. Jonathan Joseph Gammel is one of 1,483 emergency medicine physicians in Massachusetts
Emergency medicine is Dr. Gammel's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Gammel is licensed in Massachusetts.
Specialties and state licenses
- Emergency medicine, MassachusettsPrimary
Emergency medicine physicians near Dr. Gammel
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. Jonathan Joseph Gammel billed Medicare for 370 services in 2024
CMS data shows 370 Medicare services from Dr. Gammel across 4 procedure codes in 2024, for 369 Medicare patients. Medicare paid $41,245 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Gammel's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3462024: 3707%
Dr. Gammel compared with the Massachusetts median for emergency medicine physicians, 2024
- Dr. Gammel
- Massachusetts median
- Medicare services
- 370vs 3419% above
- Medicare patients
- 369vs 3379% above
- Part D claims
- 45vs 3625% above
Medians across 1,477 emergency medicine physicians in Massachusetts with Dmand AI profiles that report each measure.
Dr. Gammel'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. Jonathan Joseph Gammel treated 369 Medicare patients in 2024, average age 71
CMS counts 369 Medicare patients who saw Dr. Gammel in 2024. The largest group is under 65, with 103 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 49% are also on Medicaid. Their average risk score is 2.29, 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. Gammel's median patient age at 58, with 58% women.
Dr. Gammel's Medicare patients by age, 2024
Dr. Gammel's Medicare patients by sex, 2024
- Women21558%
- Men15442%
Chronic conditions among Dr. Gammel's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Mood disorders59%
- Anxiety54%
- Arthritis53%
- Depression52%
- Ischemic heart disease43%
- Chronic kidney disease41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gammel's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women58%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jonathan Joseph Gammel wrote 155 Medicare Part D claims in 2024
In 2024, Dr. Gammel wrote 155 Medicare Part D claims for 115 patients. 89% of them were for generic drugs. CMS names the drug for 45 of them, across 3 drugs with 11 or more claims each, at $248 in total drug cost. In 2023, CMS named 41 claims across 3 drugs.
Dr. Gammel's Part D claims by kind of drug, 2024
- Generic138 claims89%
- Brand-name17 claims11%
Dr. Gammel'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. Gammel's Part D claims, 2024
- Opioids10%16 of 155 claims
- Antibiotics26%41 of 155 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: 412024: 4510%
Drugs named by CMS: 3 in 2024, 3 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
How Dr. Jonathan Joseph Gammel takes part in Medicare
Dr. Gammel 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. Jonathan Joseph Gammel graduated from University of Massachusetts Medical School
Dr. Gammel graduated from University of Massachusetts Medical School in 2018.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jonathan Joseph Gammel'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) |
| 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. Jonathan Joseph Gammel
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. Jonathan Joseph Gammel's NPI number?
Dr. Jonathan Joseph Gammel's NPI number is 1689163560. It was assigned on May 6, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan Joseph Gammel?
Dr. Jonathan Joseph Gammel is an emergency medicine physician in Leominster, Massachusetts. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Jonathan Joseph Gammel practice?
Dr. Gammel practices at 60 Hospital Road, Leominster, MA 01453. Dr. Gammel's primary practice is UMass Memorial Health - HealthAlliance-Clinton Hospital in Leominster, Massachusetts, part of UMass Memorial Health Care. Dmand AI also links Dr. Gammel to 1 medical group.
What is Dr. Jonathan Joseph Gammel's office phone number?
The practice phone on file for Dr. Gammel is (978) 466-2000.
What is Dr. Jonathan Joseph Gammel's medical license number?
Dr. Gammel holds Massachusetts license 287536.
Which hospitals is Dr. Jonathan Joseph Gammel affiliated with?
Dr. Gammel practices at UMass Memorial Health - HealthAlliance-Clinton Hospital in Leominster, Massachusetts. Dr. Gammel is also affiliated with UMass Memorial Medical Center - University Campus.
What medical group is Dr. Jonathan Joseph Gammel part of?
Dr. Gammel is linked to UMass Memorial Medical Group. Dmand AI links Dr. Gammel to 1 more medical group.
Does Dr. Jonathan Joseph Gammel accept Medicare?
Yes. CMS data shows Dr. Gammel billed Medicare for 370 services in 2024, and Dr. Gammel accepts Medicare assignment.
How many Medicare patients does Dr. Jonathan Joseph Gammel see?
CMS counts 369 Medicare patients who saw Dr. Gammel in 2024, with an average age of 71.
What services does Dr. Jonathan Joseph Gammel bill to Medicare?
In 2024, Dr. Gammel's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and emergency department visit (99283).
Show 3 more questionsShow fewer questions
Where did Dr. Jonathan Joseph Gammel go to medical school?
Dr. Gammel graduated from University of Massachusetts Medical School in 2018.
What drugs does Dr. Jonathan Joseph Gammel prescribe most?
In 2024 Medicare Part D data, Dr. Gammel's most prescribed drugs by claims were Ondansetron ODT, Oxycodone HCl and Prednisone.
How long has Dr. Jonathan Joseph Gammel been practicing?
Dr. Gammel graduated from medical school in 2018, 8 years ago.
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