Mark Byron Jennings, MD
Internal Medicine Physician · Allen, TX
Mark Byron Jennings, MD is an internal medicine physician with a practice address in Allen, Texas, and NPI 1336379783, issued on Jul 20, 2009. Check the license (Texas P1880, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark Byron Jennings
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- P1880 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1105 Central Expy N Ste 235, Allen, TX 75013
- Phone
- (972) 747-6042
- Enumerated
- Jul 20, 2009
- Record last updated
- Sep 12, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (972) 747-6043
- Medicare enrollment
- Enrolled (PECOS I20160713000303); accepts Medicare assignment
- Medical or professional school
- University Of Oklahoma College Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 1105 Central Expy N Ste 235
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Byron Jennings in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license P1880Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,398 Medicare Part D claims for 308 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 276 claims were for opioids.
Most prescribed
- Oxycodone Hcl152 claims
- Dexamethasone116 claims
- Anastrozole114 claims
- Prochlorperazine Maleate106 claims
- Potassium Chloride101 claims
- Hydroxyurea97 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 91.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $738.48
40 payments; by number, the most common kind was education; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Oklahoma Cancer Specialists And Research Institute, LLCTulsa, OK
- Stillwater Medical Center AuthorityStillwater, OK
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Byron Jennings among 9,175 internal medicine physician records in Texas
Mark Byron Jennings, MD is one of 9,175 internal medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 54% of them.
- NPI issued2009 · 54% of these records are older, 42% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2009 · median 2004 among the 6,088 with a school on file
- Record last updated2012 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
33 internal medicine physician records list a practice address in Allen
They are 33 of the 1,770 NPPES records with a practice address in Allen, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Allen → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ali Bahrani, MDAllen, TX 750131982870416
- Robert Barnett, M.D.Allen, TX 750131982750816
- Tamara Barsik, MDAllen, TX 750131356320378
- Vanessa Buot, MDAllen, TX 750131851569891
- Mark Doerner, M.D.Allen, TX 750131922040872
- Le Giang, D.O.Allen, TX 750131801091525
- Jari Khan, M.D.Allen, TX 750131932155884
- Rajeshwar Kumar, MDAllen, TX 750131942256698
Common questions
What is Mark Byron Jennings, MD's NPI number?
Mark Byron Jennings, MD's National Provider Identifier (NPI) is 1336379783, issued on Jul 20, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mark Byron Jennings, MD located?
The NPPES record lists a practice address at 1105 Central Expy N Ste 235, Allen, TX, 75013. Phone: (972) 747-6042. Providers update this record themselves, so call before visiting.
How can I verify Mark Byron Jennings, MD's license?
NPPES lists Texas license number P1880, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Byron Jennings, MD prescribe under Medicare Part D?
In 2024, Mark Byron Jennings, MD had 2,398 Medicare Part D claims for 308 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Mark Byron Jennings, MD's MIPS final score?
The 2023 MIPS final score is 91.2 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.