Mary Carter Denny, MD| Vascular Neurology, Neurology | MedStar Health
Mary Carter Denny

Mary Carter Denny, MD
Provider is directly employed by MedStar Health

5 out of 5 (300 reviews)

Specialties: Vascular Neurology, Neurology

Languages: English


About me

Dr. M. Carter Denny obtained her medical degree from Tulane University School of Medicine as well as a Master's in public health in 2010. She completed her Neurology residency at MedStar Georgetown University Hospital in 2014. She went on to complete a two-year Vascular Neurology fellowship at the University of Texas Health Science Center at Houston (UTHealth) in 2016.

Dr. Denny is an early career clinician researcher with interests in secondary stroke prevention, systems of care delivery, and transitions of care. She completed an NIH StrokeNet fellowship as a junior faculty member at MedStar Georgetown University Hospital in 2017-2018.

Dr. Denny has experience providing acute stroke care in the field on the nation's first Mobile Stroke Unit and remotely using video-based telemedicine technology for patients in southeast Texas with UTHealth.

She is the recipient of several academic awards including the Leonard Tow Humanism in Medicine Society award and the MD/MPH award for excellence. She is a member of the Alpha Omega Alpha honor society.

In addition to her medical background, Dr. Denny enjoys yoga, running, cooking, and global travel. She speaks Spanish with high proficiency, which compliments both her medical practice and her love of travel.

Clinical areas of focus

  • Aneurysm
  • Arteriovenous Fistula
  • Arteriovenous Malformation (AVM)
  • Atherosclerosis
  • Carotid Stenosis
  • Cerebrovascular Accident (CVA)
  • Confusion
  • Difficulty Speaking
  • Disorder Of Balance
  • Dizziness
  • Moyamoya
  • Numbness
  • Subarachnoid Hemorrhage
  • Tingling
  • Transient Ischaemic Attack (TIA)
  • Unsteady Gait
  • Vision Loss
  • Visual Impairment
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Conditions and procedures

Conditions I treat

  • Aneurysm
  • Aphasia
  • Arterial Malformation Brain
  • Arteriovenous Fistula
  • Arteriovenous Malformation (AVM)
  • Atherosclerosis
  • Brain Arteriovenous Malformation
  • Cadasil
  • Cadasil Syndrome
  • Carotid Stenosis
  • Cavernous Hemangioma
  • Cavernous Sinus Thrombosis
  • Central Nervous System Lupus
  • Cerebral Aneurysm
  • Cerebral Atherosclerosis
  • Cerebral Hemorrhage
  • Cerebral Microvascular Injury
  • Cerebral Small Vessel Disease (CSVD)
  • Cerebral Venous Sinus Thrombosis
  • Cerebrovascular Accident (CVA)
  • Cerebrovascular Disorders
  • Cerebrovascular Insufficiency
  • CNS Vasculitis
  • Confusion
  • Difficulty Speaking
  • Disorder Of Balance
  • Dissection Carotid Artery
  • Dissection Of Vertebral Artery
  • Dizziness
  • Dural Arteriovenous Fistula
  • Facial Droop
  • Facial Paresis
  • Hemineglect
  • Hemiparesis
  • Hemiplegia
  • Hemorrhagic Stroke
  • Horner Syndrome
  • Intracranial Arterial Occlusion
  • Intracranial Artery Stenosis
  • Intracranial Hemorrhage
  • Ischemic Stroke
  • Lacunar Stroke
  • Moyamoya
  • Neurovascular Disease
  • Non Ruptured Cerebral Aneurysm
  • Numbness
  • Posterior Reversible Encephalopathy Syndrome
  • Receptive Aphasia
  • Stroke Related Spasticity
  • Subarachnoid Hemorrhage
  • Tingling
  • Transient Ischaemic Attack (TIA)
  • Unsteady Gait
  • Vascular Malformations Of The Brain
  • Vertebral Artery Stenosis
  • Vertebrobasilar Insufficiency
  • Vision Loss
  • Visual Impairment
  • White Matter Hyperintensities
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Procedures I perform

  • Lumbar Puncture
  • Thrombolysis
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Practice locations

Distance from Change LocationEnter your Location

3800 Reservoir Road Northwest
Pasquerilla Healthcare Center 7th Fl Dept Neurology
Washington, DC, 20007


Fax 410-354-5956

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miles away

Fax 410-354-5956


MedStar Health accepts most major health insurance plans. If you are uncertain as to whether your individual health insurance plan is accepted at MedStar Health, please call your insurance company.

  • List of insurance plans we accept
    • Cigna True Choice Plus Medicare (PPO)
    • Innovation Health: Indemnity
    • CareFirst Maryland Indemnity or PPO
    • United Select HMO - EPO/NPP
    • Cigna HMO & Network (HMO)
    • Kaiser Select
    • Cigna Network Open Access
    • Federal Employee Program (Std/Basic PPO/Blue Focus)
    • CareFirst BC/BS Advantage Core/Enhanced
    • United Medicare Advantage DSNP District of Columbia
    • United Mamsi Life & Health
    • Choice Care Network/HUMANA (PPO)
    • United Options (PPO) (includes Empire PPO)
    • WellPoint Maryland
    • Innovation Health: POS Plus
    • Tricare Reserve Select
    • Aetna Signature Administrator PPO/TPA
    • Beech Street PPO
    • WellPoint Maryland - Maryland Health Choice
    • Tricare East Prime
    • Kaiser Medicare Plus
    • CareFirst Administrators
    • Aetna HMO-Open Access/Select OA
    • Carefirst Blue Preferred PPO
    • Aetna Managed Choice Open Access (POS)
    • CareFirst NASCO
    • United Group Medicare Advantage Plans
    • HealthyBlue PPO
    • Innovation Health: POS
    • Veterans Affairs Community Care Network (VA CCN)
    • Carefirst BlueChoice Opt Out Open Access
    • Aetna Quality Point of Service (POS)
    • Innovation Health: Open POS II
    • Aetna HealthFund/Health Network Option OA
    • UnitedHealthcare Individual Exchange Plans
    • Cigna Indemnity
    • CareFirst MedStar PPO
    • Police and Fire Clinic
    • United AARP Medicare Complete
    • Private Health Care Systems (PHCS) (PPO)
    • United Select Plus (POS)
    • Aetna Traditional Choice (PPO)
    • MedStar Family Choice DC Healthy Families
    • United Core Essential (HMO)
    • CareFirst Group Medicare Advantage
    • Kaiser Signature
    • Anthem HMO - BCBS of VA HealthKeepers
    • United MD IPA Preferred (POS)
    • HumanaChoice Honor’s plan PPO
    • Cigna TotalCare (HMO D-SNP)
    • Cigna HMO Open Access
    • Tricare for Life East
    • United Golden Rule
    • United Nursing Home Plan (C-SNP
    • Cigna EPO
    • CareFirst MedStar Select PPO
    • Traditional Medicare Fee for Service
    • CareFirst Group Medicare Advantage prescription drug benefit (PPO)
    • Cigna Alliance Medicare (HMO) |
    • Tricare East Select
    • Virginia Premier
    • Aetna Medicare Advantage HMO & PPO Plans
    • Innovation Health: PPO
    • Carefirst Healthy Blue (HMO/POS)
    • United MD IPA (HMO)
    • United Erickson Advantage Plans
    • Kaiser Flexible Choice
    • Health Services for Children with Special Needs (HSCSN)
    • Veterans Affairs Community Care Network
    • Innovation Health: Open POS Plus
    • MedStar Family Choice DC Healthcare Alliance
    • Cigna PPO and PPO Plus
    • Medicaid - Virginia
    • Cigna Preferred Medicare
    • Kaiser HMO Plus and DHMO Plus Member
    • United Choice Plus
    • Aetna Elect Choice/ Open Access (POS)
    • Carefirst BlueChoice HMO
    • HumanaChoice PPO
    • Medicaid - District of Columbia
    • Maryland Point of Service Plan (MPOS)
    • Aetna Open Choice (PPO)
    • United Community Plan - Maryland Health Choice Program
    • CareFirst Blue Card Program (Out-of-area BCBS plans)
    • CareFirst (NCA) Indemnity
    • Cigna POS/Network POS
    • United Navigate
    • Aetna HMO
    • Kaiser Permanente Signature-Added Choice
    • D-SNP)
    • Kaiser Select-Added Choice
    • Aetna Managed Choice (POS)
    • Carefirst BlueChoice Open Access
    • Aetna Choice POS & Choice POS II
    • Innovation Health: Open Network Only Plus
    • United GEHA (for all other states) Compass Rose
    • Carefirst EPO
    • United Student Resources
    • Cigna True Choice Medicare (PPO)
    • Aetna Open HMO/Open HMO Option/Open EPO Plus
    • Aetna Select HMO/HealthFund/Health Network
    • United Optimum Choice Preferred (POS) & OCI Direct (HMO)
    • Medicaid - Maryland
    • United Optimum Choice
    • I-SNP
    • United Choice
    • Innovation Health: HMO & EPO Plus
    • Kaiser Maryland Medicaid MCO
    • Aetna Elect Choice/ EPO (Aetna Health Fund)
    • Aetna Student Health Insurance
    • Cigna Choice Fund PPO
    • Cigna POS Open Access & Open Access Plus
    • Carefirst BlueChoice Opt Out Plus Open Access (POS)
    • Anthem Plus BCBS of VA HealthKeepers Plus
    • Cigna Achieve Medicare (HMO C-SNP)
    • Kaiser Medicare Advantage Signature and Select
    • Innovation Health: Network Only Plus
    • Anthem (POS & Open Access POS) BCBS of VA HealthKeepers
    • Coventry Health Care National Network PPO
    • MedStar Family Choice - Maryland Health Choice
    • First Health PPO
    • Coventry of Delaware HMO/PPO
    • Coventry Health Care of Virginia
    • Great-West Healthcare POS/CIGNA



Board Certification: American Board of Psychiatry and Neurology, Neurology

Board Certification: American Board of Psychiatry and Neurology, Vascular Neurology

Fellowship Program: University of Texas Health Sciences Ctr at Houston (2016)

Residency Program: MedStar Georgetown University Hospital (2014)

Internship Program: Tulane University Medical Center (2011)

Medical School: Tulane School of Medicine (2010)


  • Leonard Tow Humanism in Medicine Society Award
  • MD/MPH Award for Excellence

News and publications

Dr. Denny is the author of Acute Stroke Care, 3rd edition, Cambridge University Press, January 2020, ISBN: 9781108731324

For a list of Dr. Denny's indexed publications please visit:

Ratings and reviews

  • Explanations the care provider gave you about your problem or condition

  • Extent to which the care provider listened to you

  • Care provider’s discussion of any proposed treatment (options, risks, benefits, etc.)

  • Care provider’s efforts to include you in decisions about your care

  • Concern the care provider showed for your questions or worries

  • Likelihood of recommending this care provider to others

  • Apr 22, 2024

    Dr. Denny is awesome. She really listened, explained things, and indulged my many questions. Very thoughtful and excellent physician.

  • Apr 9, 2024

    Dr. Denny my neurologist at Georgetown Univ. Hospital is the most exceptional doctor. She listens to you and she provides the best medical service can consistently.

  • Mar 18, 2024

    Very professional/empathetic/nice.