Mark O. Duncan, DO
Neurological Surgery Physician · Lawton, OK
Mark O. Duncan, DO is a neurological surgery physician with a practice address in Lawton, Oklahoma, and NPI 1538155122, issued on Sep 20, 2005. Check the license (Oklahoma 3848, as entered in NPPES) on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.
- Name
- Mark O. Duncan
- Credential
- DO
- Primary taxonomy
- Neurological Surgery Physician 207T00000X
- License number
- 3848 OK
Self-reported in NPPES; status is on the state search - Practice location
- 110 NW 31St St FL 2, Lawton, OK 73505
- Phone
- (580) 248-5255
- Enumerated
- Sep 20, 2005
- Record last updated
- Jul 10, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (580) 248-2036
- Medicaid ID
- 100114100A OK
- Medicare enrollment
- Enrolled (PECOS I20100202000453); accepts Medicare assignment
- Medical or professional school
- Oklahoma State University College Of Osteopathic Medicine, 1994
- Entity
- Type 1 · individual
8 nearest neurological surgery physician records → All 99 in Oklahoma → Look up another NPI →
Also registered at 110 NW 31St St FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sydney Aust, SA-C, CSTSurgical Assistant1437077971
- Brett Barnes, MDSports Medicine (Orthopaedic Surgery) Physician1326049719
- Kody King, D.O.Orthopaedic Surgery Physician1194037713
- Scott Kochenower, D.P.M.Foot & Ankle Surgery Podiatrist1174848790
- Tracy SweeneySurgical Assistant1942020334
- Nancy Varkey, PAPhysician Assistant1326387739
Verify Mark O. Duncan 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 3848Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average neurological surgery physician in 2024
35 Medicare Part D claims for 24 beneficiaries, against an average of 172 among the 4,378 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 18 claims were for opioids.
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: $19.01
1 payment: food and beverage; the largest payer was SK Life Science, Inc. The 5,377 providers of this specialty with any payment received $14,925.58 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
- Comanche County Healthcare CorporationLawton, OK
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark O. Duncan among 99 neurological surgery physician records in Oklahoma
Mark O. Duncan, DO is one of 99 neurological surgery physician records with a practice address in Oklahoma. 81% 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, 83% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1994 · median 2002 among the 67 with a school on file
- Record last updated2013 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207T00000X and a Oklahoma practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurological Surgery Physician providers in Oklahoma
There are 99 neurological surgery physician records in Oklahoma.
All 99 in Oklahoma → Every provider in Lawton → Neurological Surgery Physician nationwide →
The 8 neurological surgery physician records with the nearest ZIP codes
- Christopher Neumann, M.D.Lawton, OK 735051306051479
- Stephen Ofori-Kwakye, MDLawton, OK 735051013975580
- David Pagnanelli, MDLawton, OK 735051689669905
- Bruce Pendleton, MDEnid, OK 737011194735407
- Mason Andrews, MDEnid, OK 737031255473054
- Barry Pollard, MDEnid, OK 737031720098023
- Jeffrey Nees, MDOklahoma City, OK 731591265424204
- Thomas Reeder, D.O.Oklahoma City, OK 731591891025144
Common questions
What is Mark O. Duncan, DO's NPI number?
Mark O. Duncan, DO's National Provider Identifier (NPI) is 1538155122, issued on Sep 20, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark O. Duncan, DO located?
The NPPES record lists a practice address at 110 NW 31St St FL 2, Lawton, OK, 73505. Phone: (580) 248-5255. Providers update this record themselves, so call before visiting.
How can I verify Mark O. Duncan, DO's license?
NPPES lists Oklahoma license number 3848, 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 Mark O. Duncan, DO prescribe under Medicare Part D?
In 2024, Mark O. Duncan, DO had 35 Medicare Part D claims for 24 beneficiaries; the average among neurological surgery physician prescribers was 172. 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.