Dr. Mark Byron Jennings, MD
- Medicare services, 2024
- 124,600
- Medicare patients, 2024
- 1,069
- Part D claims, 2024
- 2,398
- MIPS score, 2024
- 96
- Hospital affiliations
- 5
- Practice address
- 12697 E 51st S St, Tulsa, OK 74146
- Practice phone
- Call (918) 505-3200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Oklahoma Cancer Specialists and Research Institute
Tulsa, Oklahoma
Find Dr. Jennings' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark Byron Jennings is an internist in Tulsa, Oklahoma
Dr. Jennings practices at Oklahoma Cancer Specialists and Research Institute in Tulsa, Oklahoma.
Dr. Jennings' NPI, 1336379783, was assigned on July 20, 2009. Dr. Jennings graduated from University of Oklahoma College of Medicine in 2009. Dr. Jennings holds Texas license P1880.
- NPI
- 1336379783NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426204322
- NPI enumeration date
- July 20, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (918) 505-3200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Byron Jennings practices at Oklahoma Cancer Specialists and Research Institute in Tulsa, Oklahoma
Dr. Jennings' primary practice is Oklahoma Cancer Specialists and Research Institute, at 12697 E 51st S St, Tulsa, OK 74146 in Tulsa County. The practice phone is (918) 505-3200.
- Oklahoma Cancer Specialists and Research Institute12697 E 51st S St, Tulsa, OK 74146 · Tulsa CountyPhone(918) 505-3200
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark Byron Jennings is affiliated with 8 sites of care and 2 medical groups
Dr. Jennings' primary practice is Oklahoma Cancer Specialists and Research Institute in Tulsa, Oklahoma. Dr. Jennings is also affiliated with Ascension St. John Medical Center. The medical group on file is Oklahoma Cancer Specialists and Research Institute. Dmand AI also links Dr. Jennings to 4 more hospitals, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark Byron Jennings' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Jennings practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Oklahoma Cancer Specialists and Research Institute | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark Byron Jennings is one of 1,018 internists in Oklahoma
Internal medicine is Dr. Jennings' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Jennings is licensed in Texas.
Specialties and state licenses
- Internal medicine, TexasPrimary
Internists near Dr. Jennings
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. Mark Byron Jennings billed Medicare for 124,600 services in 2024
CMS data shows 124,600 Medicare services from Dr. Jennings across 86 procedure codes in 2024, for 1,069 Medicare patients. Medicare paid $1,841,852 for them.
Dr. Jennings' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 102,7102024: 95,3497%
- Other services
- 2023: 22,9562024: 18,71818%
- Lab and pathology
- 2023: 7,4022024: 6,20116%
- Tests and treatments
- 2023: 2,3872024: 1,94319%
- Office and hospital visits
- 2023: 1,4712024: 1,29312%
- Surgery
- 2023: 8042024: 7902%
- Imaging
- 2023: 4622024: 30634%
Where Dr. Jennings' Medicare services took place, 2024
- In an office124,095100%
- In a facility5050%
Dr. Jennings compared with the Oklahoma median for internists, 2024
- Dr. Jennings
- Oklahoma median
- Medicare services
- 124,600vs 636195.9 times
- Medicare patients
- 1,069vs 2434.4 times
- Part D claims
- 2,109vs 2827.5 times
Medians across 969 internists in Oklahoma with Dmand AI profiles that report each measure.
Dr. Jennings' 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.
Need commercial claims for Dr. Jennings?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Jennings and other internists in Oklahoma.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Byron Jennings treated 1,069 Medicare patients in 2024, average age 74
CMS counts 1,069 Medicare patients who saw Dr. Jennings in 2024. The largest group is 65 to 74, with 463 patients. 75% of them have high blood pressure, and 66% have high cholesterol. 7% are also on Medicaid. Their average risk score is 2.40, 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. Jennings' median patient age at 71, with 56% women.
Dr. Jennings' Medicare patients by age, 2024
Dr. Jennings' Medicare patients by sex, 2024
- Women60056%
- Men46944%
Chronic conditions among Dr. Jennings' Medicare patients, 2024
- High blood pressure75%
- High cholesterol66%
- Cancer56%
- Arthritis45%
- Diabetes33%
- Ischemic heart disease30%
- Chronic kidney disease28%
- Mood disorders27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Jennings' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women56%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Byron Jennings wrote 2,398 Medicare Part D claims in 2024
In 2024, Dr. Jennings wrote 2,398 Medicare Part D claims for 308 patients. 80% of them were for generic drugs. CMS names the drug for 2,109 of them, across 52 drugs with 11 or more claims each, at $5,183,848 in total drug cost. In 2023, CMS named 1,827 claims across 49 drugs.
Dr. Jennings' Part D claims by kind of drug, 2024
- Generic1,909 claims80%
- Brand-name489 claims20%
Dr. Jennings' 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. Jennings' Part D claims, 2024
- Opioids12%276 of 2,398 claims
- Antibiotics4%104 of 2,398 claims
- Antipsychotics, patients 65 and over1%27 of 2,398 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: 1,8272024: 2,10915%
Drugs named by CMS: 52 in 2024, 49 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. Mark Byron Jennings scored 96 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 96 out of 100 for Dr. Jennings for performance year 2024, reported individually. Dr. Jennings accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Jennings' MIPS scores, performance year 2024
- 96of 100Final score
- 83of 100Quality
- 100of 100Promoting Interoperability
- 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
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Mark Byron Jennings received $4,652 in industry payments from 2016 to 2025
CMS Open Payments shows 237 general payments to Dr. Jennings from 44 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 71% of the total. Pfizer Inc. paid the most, $1,275.
General payments to Dr. Jennings by program year, 2016 to 2025
General payments to Dr. Jennings by kind, 2016 to 2025
- Food and beverage$3,31771%
- Education$1,18525%
- Honoraria$1503%
Companies that paid Dr. Jennings 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. Mark Byron Jennings graduated from University of Oklahoma College of Medicine
Dr. Jennings graduated from University of Oklahoma College of Medicine in 2009.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Byron Jennings'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| 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. Mark Byron Jennings
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. Mark Byron Jennings' NPI number?
Dr. Mark Byron Jennings' NPI number is 1336379783. It was assigned on July 20, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Byron Jennings?
Dr. Mark Byron Jennings is an internist in Tulsa, Oklahoma. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Mark Byron Jennings practice?
Dr. Jennings practices at 12697 E 51st S St, Tulsa, OK 74146. Dr. Jennings' primary practice is Oklahoma Cancer Specialists and Research Institute in Tulsa, Oklahoma. Dmand AI also links Dr. Jennings to 4 hospitals, 2 group practices and clinics and 1 medical group.
What is Dr. Mark Byron Jennings' office phone number?
The practice phone on file for Dr. Jennings is (918) 505-3200.
What is Dr. Mark Byron Jennings' medical license number?
Dr. Jennings holds Texas license P1880.
Which hospitals is Dr. Mark Byron Jennings affiliated with?
Dr. Jennings is affiliated with Ascension St. John Medical Center. Dmand AI links Dr. Jennings to 4 more hospitals.
What medical group is Dr. Mark Byron Jennings part of?
Dr. Jennings is linked to Oklahoma Cancer Specialists and Research Institute. Dmand AI links Dr. Jennings to 1 more medical group.
Does Dr. Mark Byron Jennings accept Medicare?
Yes. CMS data shows Dr. Jennings billed Medicare for 124,600 services in 2024, and Dr. Jennings accepts Medicare assignment.
What is Dr. Mark Byron Jennings' MIPS score?
Dr. Jennings' MIPS final score for performance year 2024 is 96 out of 100, reported individually.
How many Medicare patients does Dr. Mark Byron Jennings see?
CMS counts 1,069 Medicare patients who saw Dr. Jennings in 2024, with an average age of 74.
Show 5 more questionsShow fewer questions
What services does Dr. Mark Byron Jennings bill to Medicare?
In 2024, Dr. Jennings' most billed Medicare services were injected or infused drug (J1439), medicare temporary code (Q9967) and injected or infused drug (J9299).
Where did Dr. Mark Byron Jennings go to medical school?
Dr. Jennings graduated from University of Oklahoma College of Medicine in 2009.
What drugs does Dr. Mark Byron Jennings prescribe most?
In 2024 Medicare Part D data, Dr. Jennings' most prescribed drugs by claims were Oxycodone HCl, Dexamethasone and Anastrozole.
Has Dr. Mark Byron Jennings received payments from drug or device companies?
CMS Open Payments shows $4,652 in general payments to Dr. Jennings from 44 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Mark Byron Jennings been practicing?
Dr. Jennings graduated from medical school in 2009, 17 years ago.
Selling to internal medicine practices?
See internists in Oklahoma by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card