Marcus D. Sizemore, PA
Physician Assistant · Barnsdall, OK
Marcus D. Sizemore, PA is a physician assistant with a practice address in Barnsdall, Oklahoma, and NPI 1881686186, issued on Aug 22, 2005. Check the license (Oklahoma 305, as entered in NPPES) with the Oklahoma board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marcus D. Sizemore
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 305 OK
Self-reported in NPPES; status is on the state search - Practice location
- 112 N 5TH, Barnsdall, OK 74002
- Phone
- (918) 847-2558
- Enumerated
- Aug 22, 2005
- Record last updated
- Mar 31, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (918) 847-2053
- Entity
- Type 1 · individual
Verify Marcus D. Sizemore in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oklahoma board licenses this profession
Search for license 305Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average physician assistant in 2024
55 Medicare Part D claims, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Metformin Hcl12 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.
Industry payments in 2024: $119.78
1 payment: food and beverage; the largest payer was Phathom Pharmaceuticals, Inc. The 64,719 providers of this specialty with any payment received $841.65 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.
1 physician assistant records list a practice address in Barnsdall
They are 1 of the 47 NPPES records with a practice address in Barnsdall, and 1,870 physician assistant records in Oklahoma.
Other physician assistant records in Oklahoma
- David Abbott, PAOklahoma City, OK1881621241
- Teresa AberleOklahoma City, OK1588963953
- Sabrina AbrahamEdmond, OK1548980048
- Raoul Acha, PAShawnee, OK1902513682
- Nikki AcuffTulsa, OK1295390979
- Jennifer Acuna, PA-CTulsa, OK1306981071
- Britney Adair, PAStillwater, OK1578347654
- Parnell Adams, PA-CPonca City, OK1801810783
- Rebekah Adams, PAOklahoma City, OK1851005508
- Courtney Adler, PA-COklahoma City, OK1083536411
Common questions
What is Marcus D. Sizemore, PA's NPI number?
Marcus D. Sizemore, PA's National Provider Identifier (NPI) is 1881686186, issued on Aug 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Marcus D. Sizemore, PA located?
The NPPES record lists a practice address at 112 N 5TH, Barnsdall, OK, 74002. Phone: (918) 847-2558. Providers update this record themselves, so call before visiting.
How can I verify Marcus D. Sizemore, PA's license?
NPPES lists Oklahoma license number 305, as entered by the provider. Search the Oklahoma board that licenses this profession; the NPPES record confirms identity only.
How much does Marcus D. Sizemore, PA prescribe under Medicare Part D?
In 2024, Marcus D. Sizemore, PA had 55 Medicare Part D claims; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
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.