Leonard Michael Bowen, M.D.
Hematology & Oncology Physician · Oklahoma City, OK
Leonard Michael Bowen, M.D. is a hematology & oncology physician with a practice address in Oklahoma City, Oklahoma, and NPI 1851344048, issued on May 18, 2006. Check the license (Oklahoma 11976, as entered in NPPES) on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.
- Name
- Leonard Michael Bowen
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 11976 OK
Self-reported in NPPES; status is on the state search - Practice location
- 1011 N Dewey Ave, Oklahoma City, OK 73102
- Phone
- (405) 228-7100
- Enumerated
- May 18, 2006
- Record last updated
- Oct 30, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (405) 228-7150
- Medicare enrollment
- Enrolled (PECOS I20091207000612); accepts Medicare assignment
- Medical or professional school
- Medical University Of South Carolina College Of Medicine, 1979
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 128 in Oklahoma → Look up another NPI →
Also registered at 1011 N Dewey Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Feisal, MDHematology & Oncology Physician1871937680
- Ralph Ganick, M.D.Hematology & Oncology Physician1245282888
- David Lam, MDHematology & Oncology Physician1295930972
- Thy Nguyen, M.D.Hematology & Oncology Physician1053352112
Verify Leonard Michael Bowen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOklahoma Board of Medical Licensure and Supervision
Search for license 11976Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average hematology & oncology physician in 2024
1,808 Medicare Part D claims for 270 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims. 124 claims were for opioids.
Most prescribed
- Anastrozole101 claims
- Acyclovir85 claims
- Prochlorperazine Maleate72 claims
- Ondansetron Hcl70 claims
- Revlimid69 claims
- Dexamethasone62 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 practice group's MIPS final score for 2023 (Medicare payment program): 81 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $444.60
34 payments; by number, the most common kind was education; the largest payer was Pfizer Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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 one group practice
- Saints Medical Group, LLCOklahoma City, OK
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leonard Michael Bowen among 128 hematology & oncology physician records in Oklahoma
Leonard Michael Bowen, M.D. is one of 128 hematology & oncology physician records with a practice address in Oklahoma. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1979 · median 2004 among the 97 with a school on file
- Record last updated2020 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Oklahoma practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Oklahoma
There are 128 hematology & oncology physician records in Oklahoma.
All 128 in Oklahoma → Every provider in Oklahoma City → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- James Feisal, MDOklahoma City, OK 731021871937680
- Ralph Ganick, M.D.Oklahoma City, OK 731021245282888
- David Lam, MDOklahoma City, OK 731021295930972
- Thy Nguyen, M.D.Oklahoma City, OK 731021053352112
- Sakher Abdullah, MDOklahoma City, OK 731041932111333
- Philip Comp, MDOklahoma City, OK 731041790754729
- Robert Epstein, MDOklahoma City, OK 731041154390185
- James George, MDOklahoma City, OK 731041093783227
Common questions
What is Leonard Michael Bowen, M.D.'s NPI number?
Leonard Michael Bowen, M.D.'s National Provider Identifier (NPI) is 1851344048, issued on May 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leonard Michael Bowen, M.D. located?
The NPPES record lists a practice address at 1011 N Dewey Ave, Oklahoma City, OK, 73102. Phone: (405) 228-7100. Providers update this record themselves, so call before visiting.
How can I verify Leonard Michael Bowen, M.D.'s license?
NPPES lists Oklahoma license number 11976, as entered by the provider. Search the Oklahoma Board of Medical Licensure and Supervision at https://www.okmedicalboard.org/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Leonard Michael Bowen, M.D. prescribe under Medicare Part D?
In 2024, Leonard Michael Bowen, M.D. had 1,808 Medicare Part D claims for 270 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Leonard Michael Bowen, M.D.'s MIPS final score?
The 2023 MIPS final score is 81 of 100, reported for the practice group. 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.