Methodist Medical Group

Locations

Methodist Moody Brain and Spine Institute - Mansfield

252 Matlock Rd
Suite 234
Mansfield, TX 76063

View hours
Monday
8:30am - 4:00pm
Tuesday
8:30am - 4:00pm
Wednesday
8:30am - 4:00pm
Thursday
8:30am - 4:00pm
Friday
8:30am - 4:00pm
Methodist Moody Brain and Spine Institute - Mansfield

Methodist Moody Brain and Spine Institute - Dallas

1411 N. Beckley Avenue
Pavilion III Suite 152
Dallas, TX 75203

View hours
Monday
8:00am - 5:00pm
Tuesday
8:00am - 5:00pm
Wednesday
8:00am - 5:00pm
Thursday
8:00am - 5:00pm
Friday
8:00am - 5:00pm
Methodist Moody Brain and Spine Institute - Dallas

About Peter B. Theiss, MD

Peter Theiss, MD, is a neurosurgeon who specializes in vascular neurosurgery, which is the treatment of blood vessel diseases in the brain and spinal cord. This includes treatment of stroke, brain aneurysms, cerebral and spinal vascular malformations, and related problems. Dr. Theiss is trained in traditional surgical treatment for these disorders, as well as endovascular neurosurgery, which comprises minimally invasive treatments performed from within the blood vessels.

Dr. Theiss earned his Bachelor of Arts degree in Classical Languages and Literatures from Dartmouth College in Hanover, New Hampshire. He then received his medical degree from Columbia University College of Physicians and Surgeons in New York, New York. Dr. Theiss completed his neurosurgery residency at the University of Illinois at Chicago. He went on to receive fellowship training in endovascular neurosurgery from the same university.

Dr. Theiss grew up in Chicago, Illinois, but is happy to begin practicing in North Texas. Outside of the clinic, he enjoys spending time outdoors by hiking or golfing.

Conditions treated

  • Stroke
  • Brain aneurysms
  • Cerebral arteriovenous malformations
  • Cerebral and spinal arteriovenous fistulas
  • Carotid artery disease
  • Cerebral cavernous malformations
  • Intracerebral hemorrhages
  • Brain tumors
  • Spine tumors
  • Hydrocephalus
  • Degenerative disc disease
  • Spinal stenosis

Insurances Accepted

Before scheduling your appointment, please confirm that your insurance plan is accepted. Coverage can vary by provider and service, so checking in advance helps avoid unexpected costs.

Insurances Accepted

  • 90 Degree PPO
  • Aetna HMO
  • Aetna Medicare Advantage HMO
  • Aetna Medicare Advantage PPO
  • Aetna PPO
  • Aetna Whole Health Texas Health
  • Baylor Scott & White Health Plan HMO/PPO
  • Baylor Scott & White Health Plan Marketplace Exchange
  • Baylor Scott & White Health Plan Medicare Advantage
  • Baylor Scott & White Quality Alliance
  • BCBS Blue Advantage HMO Marketplace Exchange
  • BCBS Blue Choice PPO
  • BCBS Blue Essentials HMO
  • BCBS Blue Premier HMO
  • BCBS Health Select POS
  • BCBS High Performance PPO Network
  • BCBS Medicare Advantage HMO
  • BCBS Medicare Advantage PPO
  • BCBS My Blue Health Marketplace Exchange
  • Buc-ee's
  • Christian Healthcare Ministries
  • Cigna Connect Marketplace Exchange
  • CIGNA HMO
  • CIGNA Local+
  • CIGNA OAP
  • Cigna POS
  • CIGNA PPO
  • Coral Unity National Provider Network
  • Employers Health Network
  • EVRY Healthcare
  • Healthcare Highways
  • HealthSmart GEPO
  • HealthSmart PPO
  • HealthSpring Medicare Advantage HMO/PPO
  • Humana Gold Plus Medicare Advantage HMO
  • Humana Medicare Advantage PPO
  • Imperial Health Marketplace Exchange
  • Medical Cost Containment Professionals
  • Molina Marketplace
  • Molina Medicare Advantage
  • MultiPlan Commercial PPO
  • MultiPlan Medicare Advantage
  • Parkland Medicaid
  • ProCare Advantage
  • Sana Benefits
  • Superior Ambetter Essentials & Virtual Access Marketplace Plans
  • Superior CHIP
  • Superior Foster Care
  • Superior STAR Medicaid
  • Superior Star+Plus
  • Tower Extrusions
  • Traditional Medicare-Dallas County
  • Traditional Medicare-Tarrant County
  • TriWest VA Community Care
  • United Healthcare HMO
  • United Healthcare Marketplace Exchange
  • United Healthcare Medicare Advantage
  • United Healthcare PPO
  • Velocity National Provider Network
  • WellCare Medicare Advantage
  • WellCare Medicare Advantage by Allwell
  • WellMed Medicare Advantage
  • Wellpoint CHIP
  • Wellpoint Marketplace Exchange
  • Wellpoint Medicare Advantage
  • Wellpoint STAR Kids
  • Wellpoint STAR Medicaid
  • Medicare
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Provider Ratings

4.9 out of 5

(91 ratings)

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

16 Reviews

06/12/2026

Dr. Theiss is wonderful. I truly enjoy my visits with him and look forward to the next time I see him. He listens to my needs and concerns. He isn't dismissive and takes time to explain my care.

06/12/2026

Good

06/12/2026

Highly trained staff

06/03/2026

Dr Theiss is very concerned and answered all questions and concerns I had and informed of all options of treatment. Love his bedside manners; he takes time and makes sure I understand and with visuals. He's remarkable!!!

05/27/2026

Dr. Theiss explained everything very well and did not leave us with any questions

05/06/2026

Took the time to answer all questions and concern

04/29/2026

Spent 30 minutes and patiently answer all questions.

04/03/2026

Good

03/26/2026

They were both very professional and caring.

01/09/2026

Dr Peter is explained very carefully and all information I dont know or understand. He make me feel very comfortable and less worries about my case after im seeing him.

12/29/2025

Good

12/18/2025

My wife and I liked the Dr an MA very much.

11/15/2025

He was great, and am very blessed to be under Dr. Theiss care.

11/14/2025

Very good experience

10/24/2025

Good

10/16/2025

Dr Thiess is awesome and he will go far in his practice.
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