Dr. Mark O. Duncan
- Gender: Male
- Experience: 27 years
- Graduated from: Oklahoma State University College Of Osteopathic Medicine
- Graduation year: 1994
- Sole propriator: No
- NPI: 1538155122
Dr. Mark O. Duncan DO
Neurosurgeon
He is located at 110 Northwest 31st Street Floor 2 in Lawton, OK 73505. Can help patients with the following: Anal Fissure, Cyst, Enlarged Spleen, Hemorrhoids, Herniated Disc, Spinal Stenosis. His National Provider Identifier (NPI) number is 1538155122. Appointment can be made via the phone number (580) 248-5255. He is affiliated with 4 practices and 2 hospitals.
Conditions treated
Dr. Mark O. Duncan, being an neurosurgeon, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. Mark O. Duncan.
- Achalasia
- Acoustic Neuroma
- Anal Fissure
- Appendicitis
- Boils
- Brain Aneurysm
- Brain Cancer
- Brain Damage
- Brain Hemorrhage
- Brain Lesions
- Cancer
- Cauda Equina Syndrome
- Cerebral Aneurysm
- Cervical Radiculopathy
- Colon Cancer
- Concussion
- Crohn's Disease
- Cyst
- Diverticulosis
- Enlarged Spleen
- Esophageal Cancer
- Gallstones
- Gangrene
- Heart Disease
- Hemorrhoids
- Hernia
- Herniated Disc
- Hydrocephalus
- Inflammatory Bowel Disease (IBD)
- Lymphedema
- Neck Pain
- Pancreatitis
- Paralysis
- Peptic Ulcer
- Peripheral Nerve Tumors
- Pilonidal Cyst
- Pinched Nerve
- Pseudotumor Cerebri
- Quadriplegia
- Sebaceous Cyst
- Spinal Cord Injury
- Spinal Stenosis
- Spondylosis
- Traumatic Brain Injury
- Ulcerative Colitis
Procedures Performed by Dr. Mark O. Duncan
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Mark O. Duncan as in-network for the following 2026 plans.
Health plans
Ambetter of Oklahoma
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 20 plans from Ambetter of Oklahoma
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Elite Bronze | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Elite Bronze + Vision + Adult Dental | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Elite Gold | PPO · Gold | Preferred | Accepting new patients |
| Elite Gold + Vision + Adult Dental | PPO · Gold | Preferred | Accepting new patients |
| Enhanced Asthma/COPD Care Silver with $0 Drug Options | PPO · Silver | Preferred | Accepting new patients |
| Enhanced Asthma/COPD Care Silver with $0 Drug Options + Vision + Adult Dental | PPO · Silver | Preferred | Accepting new patients |
| Enhanced Diabetes Care Silver with $0 Drug Options | PPO · Silver | Preferred | Accepting new patients |
| Enhanced Diabetes Care Silver with $0 Drug Options + Vision + Adult Dental | PPO · Silver | Preferred | Accepting new patients |
| Everyday Bronze | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Everyday Bronze + Vision + Adult Dental | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Everyday Gold | PPO · Gold | Preferred | Accepting new patients |
| Everyday Gold + Vision + Adult Dental | PPO · Gold | Preferred | Accepting new patients |
| Focused Silver | PPO · Silver | Preferred | Accepting new patients |
| Focused Silver + Vision + Adult Dental | PPO · Silver | Preferred | Accepting new patients |
| Standard Expanded Bronze | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Expanded Bronze + Vision + Adult Dental | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Gold | PPO · Gold | Preferred | Accepting new patients |
| Standard Gold + Vision + Adult Dental | PPO · Gold | Preferred | Accepting new patients |
| Standard Silver | PPO · Silver | Preferred | Accepting new patients |
| Standard Silver + Vision + Adult Dental | PPO · Silver | Preferred | Accepting new patients |
Blue Cross and Blue Shield of Oklahoma
Network data as of Jun 7, 2026, as reported by the insurer.
Show all 13 plans from Blue Cross and Blue Shield of Oklahoma
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Blue Advantage Bronze PPO℠ 202 (5 plan variants) | PPO · Bronze | Blue Advantage PPO | Accepting new patients |
| Blue Advantage Bronze PPO℠ 203 (5 plan variants) | PPO · Expanded Bronze | Blue Advantage PPO | Accepting new patients |
| Blue Advantage Bronze PPO℠ Standard (5 plan variants) | PPO · Expanded Bronze | Blue Advantage PPO | Accepting new patients |
| Blue Advantage Gold PPO℠ 309 (5 plan variants) | PPO · Gold | Blue Advantage PPO | Accepting new patients |
| Blue Advantage Gold PPO℠ 604 (5 plan variants) | PPO · Gold | Blue Advantage PPO | Accepting new patients |
| Blue Advantage Gold PPO℠ Standard (5 plan variants) | PPO · Gold | Blue Advantage PPO | Accepting new patients |
| Blue Advantage Silver PPO℠ 204 (5 plan variants) | PPO · Silver | Blue Advantage PPO | Accepting new patients |
| Blue Advantage Silver PPO℠ 501 (5 plan variants) | PPO · Silver | Blue Advantage PPO | Accepting new patients |
| Blue Advantage Silver PPO℠ Standard (5 plan variants) | PPO · Silver | Blue Advantage PPO | Accepting new patients |
| Blue Preferred Bronze PPO℠ Standard (5 plan variants) | PPO · Expanded Bronze | Blue Preferred PPO | Accepting new patients |
| Blue Preferred Gold PPO℠ Standard (5 plan variants) | PPO · Gold | Blue Preferred PPO | Accepting new patients |
| Blue Preferred Security PPO℠ 200 (5 plan variants) | PPO · Catastrophic | Blue Preferred PPO | Accepting new patients |
| Blue Preferred Silver PPO℠ Standard (5 plan variants) | PPO · Silver | Blue Preferred PPO | Accepting new patients |
Medica
Network data as of Dec 17, 2025, as reported by the insurer.
Show all 18 plans from Medica
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Harmony by Medica Bronze $0 Copay PCP Visits | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Harmony by Medica Bronze $0 Copay PCP Visits + Adult Eye Exam | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Harmony by Medica Bronze Premier | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Harmony by Medica Bronze Premier + Adult Eye Exam | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Harmony by Medica Expanded Bronze Standard | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Harmony by Medica Expanded Bronze Standard + Adult Eye Exam | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Harmony by Medica Gold $0 Copay PCP Visits | PPO · Gold | Preferred | Accepting new patients |
| Harmony by Medica Gold $0 Copay PCP Visits + Adult Eye Exam | PPO · Gold | Preferred | Accepting new patients |
| Harmony by Medica Gold Share | PPO · Gold | Preferred | Accepting new patients |
| Harmony by Medica Gold Share + Adult Eye Exam | PPO · Gold | Preferred | Accepting new patients |
| Harmony by Medica Gold Standard | PPO · Gold | Preferred | Accepting new patients |
| Harmony by Medica Gold Standard + Adult Eye Exam | PPO · Gold | Preferred | Accepting new patients |
| Harmony by Medica Silver $0 Copay PCP Visits | PPO · Silver | Preferred | Accepting new patients |
| Harmony by Medica Silver $0 Copay PCP Visits + Adult Eye Exam | PPO · Silver | Preferred | Accepting new patients |
| Harmony by Medica Silver Share | PPO · Silver | Preferred | Accepting new patients |
| Harmony by Medica Silver Share + Adult Eye Exam | PPO · Silver | Preferred | Accepting new patients |
| Harmony by Medica Silver Standard | PPO · Silver | Preferred | Accepting new patients |
| Harmony by Medica Silver Standard + Adult Eye Exam | PPO · Silver | Preferred | Accepting new patients |
Mending Health
Network data as of Sep 10, 2026, as reported by the insurer.
Show all 6 plans from Mending Health
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| MENDING Direct Primary Care Bronze 4950 ($0 DPC + $0 PCP + $0 Mental Health) | HMO · Expanded Bronze | Preferred | Accepting new patients |
| MENDING Direct Primary Care Gold $0 Ded ($0 DPC $0 PCP + $0 Mental Health) | HMO · Gold | Preferred | Accepting new patients |
| MENDING Direct Primary Care Silver 2300 ($0 DPC + $0 PCP + $0 Mental Health) | HMO · Silver | Preferred | Accepting new patients |
| MENDING Standard Bronze (No Direct Primary Care, for DPC select DPC Bronze) | HMO · Expanded Bronze | Preferred | Accepting new patients |
| MENDING Standard Gold (No Direct Primary Care, for DPC select DPC Gold) | HMO · Gold | Preferred | Accepting new patients |
| MENDING Standard Silver (No Direct Primary Care, for DPC select DPC Silver) | HMO · Silver | Preferred | Accepting new patients |
UnitedHealthcare
Network data as of Sep 16, 2026, as reported by the insurer.
Show all 13 plans from UnitedHealthcare
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| UHC Bronze Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, No Referrals) | HMO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Essential (No Referrals) | HMO · Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Standard (No Referrals) | HMO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Standard+ (Dental + Vision, No Referrals) | HMO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Gold Advantage ($0 Virtual Urgent Care, No Referrals) | HMO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Advantage+ ($0 Virtual Urgent Care, Dental + Vision, No Referrals) | HMO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, $5 Tier 2 Rx, No Referrals) | HMO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Standard (No Referrals) | HMO · Gold | Non Preferred | Accepting new patients |
| UHC Silver Advantage ($0 Virtual Urgent Care, $5 Tier 2 Rx, No Referrals) | HMO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Advantage+ ($0 Virtual Urgent Care, $5 Tier 2 Rx, Dental + Vision, No Referrals) | HMO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Standard (No Referrals) | HMO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Value ($0 Virtual Urgent Care, $5 Tier 2 Rx, No Referrals) | HMO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Value+ ($0 Virtual Urgent Care, $5 Tier 2 Rx, Dental + Vision, No Referrals) | HMO · Silver | Non Preferred | Accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. Mark O. Duncan is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. Mark O. Duncan is enrolled to bill Medicare as a Practitioner - Neurosurgery .
Bills through: Comanche County Healthcare Corporation
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Payments received
Drug payment
| Zimmer Biomet | $699 |
| Stryker | $488 |
| Globus Medical | $146 |
Other
| Travel and Lodging | $1161 |
| Food and Beverage | $481 |
Studies
OKLAHOMA STATE UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Graduated in 1994Additional Specialities
- Surgeon
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Questions & Answers
Where can you meet with Dr. Mark O. Duncan?
Dr. Mark O. Duncan's office is located at 110 Northwest 31st Street Floor 2 in Lawton, OK 73505.
What conditions does Dr. Mark O. Duncan treat?
Dr. Mark O. Duncan provides treatment for Anal Fissure, Cyst, Enlarged Spleen, Hemorrhoids, Herniated Disc, Spinal Stenosis. For the full list see this list.
Does Dr. Mark O. Duncan have affiliation with practices?
Dr. Mark O. Duncan is affiliated with MNT Diabetes Services. For the full list of practices see this list.
Has Dr. Mark O. Duncan affiliation with hospitals?
Dr. Mark O. Duncan is affiliated with COMANCHE COUNTY MEMORIAL HOSPITAL. For the full list of hospitals see this list.
Does Dr. Mark O. Duncan accept patients with Blue Cross and Blue Shield of Oklahoma?
Yes, Dr. Mark O. Duncan is listed in-network for Blue Cross and Blue Shield of Oklahoma through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.