John Gemma
- Medicare services, 2024
- 350
- Medicare patients, 2024
- 142
- Part D claims, 2024
- 222
- MIPS score, 2024
- 73
- Hospital affiliations
- 1
- Practice address
- 1120 South Utica Avenue, Tulsa, OK 74104
- Practice phone
- Call (918) 579-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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John Gemma is an internist in Tulsa, Oklahoma
John Gemma practices at Hillcrest Medical Center in Tulsa, Oklahoma, part of Ardent Health.
John Gemma's NPI, 1750791760, was assigned on April 29, 2014. John Gemma holds Oklahoma license 5744.
- NPI
- 1750791760NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4789954769
- NPI enumeration date
- April 29, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (918) 579-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
John Gemma practices at Hillcrest Medical Center in Tulsa, Oklahoma
John Gemma's primary practice is Hillcrest Medical Center, at 1120 South Utica Avenue, Tulsa, OK 74104 in Tulsa County. The practice phone is (918) 579-1000.
- Hillcrest Medical Center1120 South Utica Avenue, Tulsa, OK 74104 · Tulsa CountyPhone(918) 579-1000
Source: Dmand AI Affiliation Data
John Gemma is affiliated with 3 sites of care and 4 medical groups
John Gemma's primary practice is Hillcrest Medical Center in Tulsa, Oklahoma, part of Ardent Health. The medical group on file is Sound Physicians. Dmand AI also links John Gemma to 3 more medical groups and 2 group practices and clinics, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at John Gemma's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Gemma practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hillcrest Medical Center | Available with a free account |
| +2 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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John Gemma is one of 1,018 internists in Oklahoma
Internal medicine is John Gemma's primary specialty in the NPI Registry, under taxonomy code 207R00000X. John Gemma is licensed in Oklahoma.
Specialties and state licenses
- Internal medicine, OklahomaPrimary
Internists near John Gemma
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
John Gemma billed Medicare for 350 services in 2024
CMS data shows 350 Medicare services from John Gemma across 4 procedure codes in 2024, for 142 Medicare patients. Medicare paid $32,902 for them. Every service was in a facility, such as a hospital, rather than an office.
John Gemma's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3242024: 3508%
John Gemma compared with the Oklahoma median for internists, 2024
- John Gemma
- Oklahoma median
- Medicare services
- 350vs 63645% below
- Medicare patients
- 142vs 24342% below
- Part D claims
- 55vs 28280% below
Medians across 969 internists in Oklahoma with Dmand AI profiles that report each measure.
John Gemma'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
John Gemma treated 142 Medicare patients in 2024, average age 73
CMS counts 142 Medicare patients who saw John Gemma in 2024. The largest group is 75 to 84, with 56 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 28% are also on Medicaid. Their average risk score is 3.30, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts John Gemma's median patient age at 72, with 52% women.
John Gemma's Medicare patients by age, 2024
John Gemma's Medicare patients by sex, 2024
- Women5740%
- Men8560%
Chronic conditions among John Gemma's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes60%
- Heart failure58%
- Ischemic heart disease58%
- Chronic kidney disease56%
- Arthritis54%
- Mood disorders52%
Share of Medicare patients with each condition. A patient can have several.
John Gemma'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
- Women52%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
John Gemma wrote 222 Medicare Part D claims in 2024
In 2024, John Gemma wrote 222 Medicare Part D claims for 107 patients. 86% of them were for generic drugs. CMS names the drug for 55 of them, across 3 drugs with 11 or more claims each, at $358 in total drug cost. In 2023, CMS named 29 claims across 2 drugs.
John Gemma's Part D claims by kind of drug, 2024
- Generic191 claims86%
- Brand-name and other31 claims14%
John Gemma'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 John Gemma's Part D claims, 2024
- Opioids5%12 of 222 claims
- Antibiotics31%69 of 222 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: 292024: 5590%
Drugs named by CMS: 3 in 2024, 2 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
John Gemma scored 73 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 73 out of 100 for John Gemma for performance year 2024, reported as part of a group. John Gemma accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
John Gemma's MIPS scores, performance year 2024
- 73of 100Final score
- 20of 100Improvement Activities
- 83of 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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Sources for John Gemma'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) |
| 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 John Gemma
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John Gemma's NPI number?
John Gemma's NPI number is 1750791760. It was assigned on April 29, 2014, and it is active in the NPI Registry.
What does John Gemma specialize in?
John Gemma is an internist in Tulsa, Oklahoma. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does John Gemma practice?
John Gemma practices at 1120 South Utica Avenue, Tulsa, OK 74104. John Gemma's primary practice is Hillcrest Medical Center in Tulsa, Oklahoma, part of Ardent Health. Dmand AI also links John Gemma to 3 medical groups and 2 group practices and clinics.
What is John Gemma's office phone number?
The practice phone on file for John Gemma is (918) 579-1000.
What is John Gemma's medical license number?
John Gemma holds Oklahoma license 5744.
Which hospitals is John Gemma affiliated with?
John Gemma practices at Hillcrest Medical Center in Tulsa, Oklahoma.
What medical group is John Gemma part of?
John Gemma is linked to Sound Physicians. Dmand AI links John Gemma to 3 more medical groups.
Does John Gemma accept Medicare?
Yes. CMS data shows John Gemma billed Medicare for 350 services in 2024, and John Gemma accepts Medicare assignment.
What is John Gemma's MIPS score?
John Gemma's MIPS final score for performance year 2024 is 73 out of 100, reported as part of a group.
How many Medicare patients does John Gemma see?
CMS counts 142 Medicare patients who saw John Gemma in 2024, with an average age of 73.
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What services does John Gemma bill to Medicare?
In 2024, John Gemma's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and hospital inpatient care (99223).
What drugs does John Gemma prescribe most?
In 2024 Medicare Part D data, John Gemma's most prescribed drugs by claims were Doxycycline Hyclate, Prednisone and Amoxicillin-Clavulanate Potass.
How long has John Gemma been practicing?
John Gemma graduated from medical school in 2014, 12 years ago.
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