Marc D. Knudsen, D.O.
Emergency Medicine Physician · Oklahoma City, OK
Marc D. Knudsen, D.O. is an emergency medicine physician with a practice address in Oklahoma City, Oklahoma, and NPI 1235125683, issued on Sep 21, 2005. Check the license (Oklahoma 3859, as entered in NPPES) on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.
- Name
- Marc D. Knudsen
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 3859 OK
Self-reported in NPPES; status is on the state search - Practice location
- 3300 NW Expressway, Oklahoma City, OK 73112
- Phone
- (405) 951-2541
- Enumerated
- Sep 21, 2005
- Record last updated
- Apr 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (405) 951-2237
- Medicaid ID
- 100259600A OK
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 748 in Oklahoma → Look up another NPI →
Also registered at 3300 NW Expressway
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kelli Ables, OTR/LOccupational Therapist1902495062
- Manoj Abraham, DOPediatrics Physician1457841223
- Rebekah Adams, PAPhysician Assistant1851005508
- Comfort Adeyemi, APRNAdult Health Clinical Nurse Specialist1720597974
- Laura Adhikari, MDAnatomic Pathology & Clinical Pathology Physician1780848697
- Mark Aittaniemi, M.D.Anesthesiology Physician1346468790
Verify Marc D. Knudsen 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 3859Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average emergency medicine physician in 2024
29 Medicare Part D claims for 23 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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): 0 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).
Marc D. Knudsen among 748 emergency medicine physician records in Oklahoma
Marc D. Knudsen, D.O. is one of 748 emergency medicine physician records with a practice address in Oklahoma. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2021 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Oklahoma practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Oklahoma
There are 748 emergency medicine physician records in Oklahoma.
All 748 in Oklahoma → Every provider in Oklahoma City → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Billy Bryan, D.O.Oklahoma City, OK 731121376565622
- Matthew Caudle, M.D.Oklahoma City, OK 731121649473166
- Scott Chappell, M.D.Oklahoma City, OK 731121194783258
- Robert Cunningham, MDOklahoma City, OK 731121548461007
- David Fish, M.D.Oklahoma City, OK 731121619179389
- Terry Hall, M.D.Oklahoma City, OK 731121124040480
- Richard Heigle, MDOklahoma City, OK 731121386680627
- Rachel Lafortune, M.D.Oklahoma City, OK 731121285600445
Common questions
What is Marc D. Knudsen, D.O.'s NPI number?
Marc D. Knudsen, D.O.'s National Provider Identifier (NPI) is 1235125683, issued on Sep 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Marc D. Knudsen, D.O. located?
The NPPES record lists a practice address at 3300 NW Expressway, Oklahoma City, OK, 73112. Phone: (405) 951-2541. Providers update this record themselves, so call before visiting.
How can I verify Marc D. Knudsen, D.O.'s license?
NPPES lists Oklahoma license number 3859, 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 Marc D. Knudsen, D.O. prescribe under Medicare Part D?
In 2024, Marc D. Knudsen, D.O. had 29 Medicare Part D claims for 23 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Marc D. Knudsen, D.O.'s MIPS final score?
The 2023 MIPS final score is 0 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.