Allison Liefeld Fillar, MD| Sports Medicine, Orthopedic Sports Medicine | MedStar Health
Allison Liefeld Fillar

Allison Liefeld Fillar, MD
Provider is directly employed by MedStar Health

4.9 out of 5 (1836 reviews)

Specialties: Sports Medicine, Orthopedic Sports Medicine, Orthopedic Surgery

Languages: English

410-554-2084

About me

Allison Fillar, MD is fellowship trained and board-certified in orthopaedic surgery and sports medicine. She specializes in reconstructive knee and shoulder surgery.

Dr. Fillar has cared for professional, collegiate, and high school athletic teams in New York and Maryland.  She has conducted research on various topics including meniscal root injuries, patellar tendon repair techniques, treatment after Achilles tendon ruptures and has analyzed varying techniques for ACL reconstruction.

Dr. Fillar is a member of the American Academy of Orthopaedic Surgeons, the American Orthopaedic Society for Sports Medicine, and the Arthroscopy Association of North America.  She has been an invited instructor for arthroscopy courses at the American Academy of Orthopaedic Surgeons.  She teaches residents and fellows across the DC, Maryland and Virginia region. 

Dr. Fillar's focus is on helping patients get back to the activities they love. She believes in building relationships with patients over time and works in partnership with each person to evaluate treatment options.

Clinical areas of focus

  • Heel Tendon Repair
  • Hip Arthroscopy With Meniscus Repair
  • Knee Arthroscopy With Meniscectomy
  • Knee Pain
  • Knee Replacement
  • Knee Revision Surgery
  • Patella Tracking Disorder
  • Sports Injuries
  • Tendon Transplantation
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Conditions and procedures

Conditions I treat

  • Ac Joint Arthritis
  • Acl Tear
  • Arthropathy
  • Bone Discontinuity
  • Bone Disorders
  • Bursopathy
  • Cartilage Disorder
  • Complications Of Cardiac And Vascular Prosthetic Devices
  • Enteropathic Arthropathies
  • Enthesopathies
  • Enthesopathy Of Knee
  • Femur Shaft Fracture
  • Flexor Tendonitis
  • Golfer's Elbow
  • Hip And Thigh Tendon Injury
  • Joint Derangement
  • Joint Derangement Of Knee
  • Joint Disorder
  • Joint Infection (SEPTIC ARTHRITIS)
  • Knee And Leg Open Wound
  • Knee Fracture
  • Knee Joint And Ligament Sprain
  • Knee Pain
  • Knee Stiffness
  • Lateral Meniscus Injury
  • Lcl Sprain Or Tear
  • Lower Leg And Ankle Fracture
  • Lower Leg Injury
  • Lumbar Spine Fracture
  • Mcl Sprain Or Tear
  • Muscle Disorders
  • Musculoskeletal System Deformities
  • Olecranon Bursitis
  • Orthopedic Aftercare
  • Osteoarthritis
  • Osteochondropathies
  • Osteonecrosis
  • Patella Dislocation
  • Patella Tracking Disorder
  • Rotator Cuff Disorder
  • Rotator Cuff Impingement
  • Shoulder And Upper Arm Muscle, Fascia, And Tendon Injury
  • Shoulder Burns
  • Shoulder Dislocation
  • Shoulder Fracture
  • Shoulder Joint And Ligament Sprain
  • Spinal Osteochondrosis
  • Sports Injuries
  • Superficial Knee Injury
  • Synovium And Tendon Disorder
  • Tendinous Disorders
  • Tendonitis Of The Shoulder
  • Tennis Elbow
  • Thumb Synovitis
  • Wrist And Hand Joint And Ligament Dislocation And Sprain
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Procedures I perform

  • Arthrodesis Of Ankle
  • Arthroscopic Shoulder Debridement
  • Arthroscopy Knee Loose Body Removal
  • Arthroscopy With Chondroplasty
  • Balance And Coordination Training
  • Bone Graft
  • Bone Repair
  • Cartilage Transplant
  • Cervical Epidural Steroid Injection
  • Cervical Myelopathy Surgery
  • Closed Clavicular Fracture Treatment
  • Closed Proximal Fibula Or Shaft Fracture Treatment
  • Elbow Dislocation Reduction
  • Femoral Nerve Transfer
  • Hand Tendon Repair
  • Heel Tendon Repair
  • Hip Arthroscopy With Meniscus Repair
  • Hip Arthroscopy With Synovectomy
  • Intertrochanteric Fracture Treatment
  • Joint Arthroscopy
  • Kinesiology Analysis
  • Knee Arthroscopy With Meniscectomy
  • Knee Injection
  • Knee Injury Treatment
  • Knee Joint Diagnostic Drainage
  • Knee Ligament Repair
  • Knee Realignment
  • Knee Replacement
  • Knee Revision Surgery
  • Muscle Injection
  • Open Treatment Of Tibial Fracture
  • Orthopedic Physical Therapy
  • Orthopedic Urgent Care
  • Osteochondral Autograft Transplantation
  • Osteotomy
  • Removal Of Implant
  • Removal Of Synthetic Substitute From Knee Joint
  • Reposition Upper Femur With Internal Fixation
  • Return To Work Evaluation
  • Robotic Trunk Procedure
  • Second Opinion For Neurological Conditions
  • Shoulder Arthroscopy
  • Shoulder Dislocation Treatment
  • Shoulder Instability Repair
  • Sports Performance Training
  • Surgical Repair Of Flexor Tendon
  • Surgical Treatment
  • Tendon Transplantation
  • Total Hip Replacement
  • Wrist Arthrotomy With Exploration
  • Wrist Instability Reconstruction
  • Wrist Instability Treatment
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Practice locations

Distance from Change LocationEnter your Location

3333 N Calvert St
Johnston Professional Bldg Ste 400
Baltimore, MD, 21218

410-554-2161

Fax 667-359-3004

Get Directions

miles away

Fax 667-359-3004

2118 Greenspring Dr
Ste 210
Timonium, MD, 21093

410-554-2161

Fax 667-359-3004

Get Directions

miles away

Fax 667-359-3004

2 Loveton Cir
Sparks, MD, 21152

410-554-2161

Fax 667-359-3004

Get Directions

miles away

Fax 667-359-3004

Insurance

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
    • First Health PPO
    • Select HMO/HealthFund/Health Network
    • IH-Open HMO
    • CIGNA POS/Network POS
    • CareFirst Blue Choice Opt Out Plus Open Access (POS)
    • OA Plus
    • IH-POS
    • Cigna Preferred Medicare (HMO)
    • Anthem BCBS of VA HealthKeepers Plus
    • Cigna Alliance Medicare (HMO)
    • Optimum Choice & Optimum Choice Preferred (POS) Cardiac Global
    • Medicare FFS
    • Choice POS
    • CareFirst Group Medicare Advantage
    • WellPoint Maryland - Maryland Health Choice
    • Options PPO Cardiac Global
    • M.D. IPA (HMO)
    • IH-Indemnity
    • AMERIVANTAGE/Amerigroup Community Care
    • CareFirst BlueChoice HMO
    • Mamsi Life & Health (Indem./PPO)
    • Blue Choice Advantage
    • Aetna Advantage 6350
    • NYC Medicare Advantage Plus
    • Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA
    • HUMANA/Choice Care Medicare Plans (Choice, Gold Choice)
    • Kaiser Permanente HMO Plus and DHMO Plus Member
    • Coventry Health Care National Network PPO
    • Core Essential (HMO)
    • United HealthCare Community Plan - Maryland Health Choice Program
    • Aetna Signature Administrator PPO/TPA
    • TRICARE for Life East
    • Kaiser Permanente Flexible Choice POS Cardiac Global
    • Aetna Elect Choice/ Open Access (POS)
    • IH-Open Network Only Plus
    • CareFirst (NCA) Indemnity
    • Aetna Basic
    • HumanaChoice Honor's plan PPO
    • Kaiser Permanente Select
    • CareFirst FEP Blue Focus
    • CareFirst MedStar Select PPO
    • Coventry of Delaware HMO/PPO
    • UHC Group Medicare Advantage Plans (HMO, POS, PPO)
    • MD IPA (HMO) & MD IPA Preferred Cardiac Global
    • Aetna Managed Choice (POS)
    • Medicare Direct
    • CIGNA Indemnity
    • IH-Open POS II
    • MedStar Family Choice - Maryland Health Choice
    • Aetna Classic 5000
    • United Healthcare Community Plan - VA Medicaid MCO
    • Healthy Blue (HMO, POS)
    • Aetna Elect Choice/ EPO (Aetna Health Fund)
    • IH-EPO Plus
    • Amerigroup DC Alliance
    • Humana Medicare Advantage - PPO
    • United Medicare Private Fee-for-Service (PFFS) plans
    • Optimum Choice
    • Optimum Choice Preferred (POS)
    • United Healthcare Choice Cardiac Global
    • CareFirst BlueCross BlueShield Advantage Core/Enhanced
    • CareFirst Dual Prime HMO-SNP
    • IH-HMO
    • Beech Street PPO
    • POS OA
    • Johns Hopkins Advantage MD HMO
    • CIGNA PPO
    • TRICARE East Select
    • IH-Open EPO Plus
    • MedStar Family Choice DC Healthy Families
    • United Healthcare Select HMO-EPO/NPP Cardiac Global
    • MultiPlan, Inc
    • Anthem Federal Employee Program Standard
    • Anthem BCBS Medi Blue SNP
    • Uniformed Services Family Health Plan
    • Police and Fire Clinic
    • United Healthcare Choice Plus
    • Aetna Traditional Choice (PPO)
    • CareFirst Blue Card Program
    • Kaiser Permaenete Signature - Added Choice Cardiac Global
    • Advantra Platinum (PPO)
    • Cigna TotalCare (HMO D-SNP)
    • Cigna True Choice Plus Medicare (PPO)
    • AmeriHealth Caritas DC Healthcare Alliance
    • Anthem BCBS Medi Blue Dual Adv
    • Optima Family Care MCO - VA Medicaid MCO
    • Maryland Physicians Care MCO
    • United Healthcare Navigate Cardiac Global
    • Aetna Premier 200PD
    • Kaiser Permanente Flexible Choice 3-tier POS
    • Private Health Care Systems (PPO)
    • Anthem BCBS Medi Blue Plus
    • Jai Medical Systems - Maryland Health Choice
    • CareFirst EPO
    • Navigate
    • Mamsi Life & Health (Indem./PPO) Cardiac Global
    • DC/MD SHOP QHP Small Business Plans
    • IH-POS Plus
    • Priority Partners - Maryland Health Choice
    • M.D. IPA Preferred (POS)
    • UnitedHealthcare Individual Exchange Plans
    • OCI Direct (HMO)
    • Anthem BCBS of VA Key Care POS/PPO/Indemnity
    • CareFirst Administrators
    • HighMark
    • Anthem BCBS of VA HealthKeepers (POS & POS OA)
    • IH-Open POS Plus
    • Aetna Better Health of MD
    • Great-West Healthcare POS/CIGNA
    • United Healthcare Select Plus (POS)
    • Choice Fund PPO
    • UnitedHealthcare Medicare Advantage DSNP District of Columbia
    • TRICARE East Prime
    • BCBS of Michigan (BCN Advantage,Security Blue, Freedom, Medicare PLUS Blue Group PPO)
    • Network OA
    • Aetna Quality Point of Service (POS)
    • Kaiser Permanente Select - Added Choice
    • CareFirst Blue Choice Opt Out Open Access
    • Humana Gold Plus HMO
    • Fee-for-Service (FFS) District of Columbia, Maryland and Virginia Medicaid
    • Aetna Medicare Advantage PFFS Plan
    • Cigna Achieve Medicare (HMO C-SNP)
    • Aetna VA Exchange
    • Humana Medicare Advantage - HMO Open Access
    • Magellan Complete Care of VA - VA Medicaid MCO
    • Coventry Health Care of Virginia
    • Kaiser Permanente Medicare Plus
    • CIGNA PPO Plus
    • United Healthcare Select HMO - EPO/NPP
    • UnitedHealthcare and AARP Medicare Complete Plans
    • Sentara Health
    • BlueChoice Open Access
    • Tricare Reserve Select
    • Choice POS II
    • CareFirst MedStar PPO
    • Choice Care Network/HUMANA (PPO)
    • CIGNA EPO
    • MedStar Family Choice DC Healthcare Alliance
    • Aetna Medicare Advantage HMO & PPO Plans
    • Aetna Classic 5000PD
    • Anthem BCBS of VA HealthKeepers (HMO)
    • Employee Health Plan
    • Choice POS II Open Access
    • United Healthcare Choice Plus Cardiac Global
    • CIGNA HMO & Network (HMO)
    • Kaiser Maryland Medicaid MCO
    • Erickson Advantage Plans
    • HealthyBlue PPO
    • UnitedHealthcare Medicare Adv. Special Needs Plans
    • Kaiser Permanente Medicare Advantage Signature and Select
    • United Student Resources
    • IH-Open HMO Option
    • Kaiser Permanente Signature
    • Geisinger Medicare Advantage
    • Private Fee-for-Service Plans (PFFS)
    • CareFirst Group Medicare Advantage prescription drug benefit (PPO)
    • CareFirst Community Health Plan of MD
    • Aetna Advantage 5750
    • UHC Passport
    • First Health PPO
    • Alterwood Advanatge HMO & DSNP Plans
    • Aetna Classic 3500
    • Kaiser Permanente Signature - Added Choice
    • AmeriHealth Caritas DC Healthy Families
    • United Healthcare Options (PPO)
    • IH-Network Only Plus
    • Veterans Affairs Community Care Network
    • CareFirst NASCO
    • Johns Hopkins Advantage MD PLUS PPO
    • HumanaChoice PPO
    • CareFirst Maryland Point of Service Plan
    • CareFirst Blue Preferred PPO
    • BCBS Out-of-State Medicare Plans (Blue Advantage)
    • Aetna Open Choice (PPO)
    • Anthem Federal Employee Program Basic
    • Aetna Managed Choice Open Access (POS)
    • CareFirst Maryland Indemnity or PPO
    • CIGNA SureFit (HMO)
    • United Healthcare Choice
    • Aetna Advantage 6350PD
    • IH-PPO
    • CIGNA HMO Open Access
    • Lasso Healthcare - Medicare Medical Savings Account
    • Amerigroup DC Healthy Families
    • Aetna Better Health of VA
    • Cigna True Choice Medicare (PPO)
    • TriWest Healthcare Alliance
    • Medicare Advantage - Advantra Value (PPO)
    • Aetna Worker's Compensation Network
    • Kaiser Permanente Select Cardiac Global
    • Johns Hopkins Advantage MD PPO
    • CareFirst Federal Employee Program (Std. & Basic PPO)
    • Aetna HMO
    • Aetna Student Health Insurance
    • CIGNA Connect EPO
    • Health Services for Children with Special Needs

Videos

Education

Board Certification: American Board of Orthopaedic Surgery, Orthopaedic Surgery

Fellowship: MedStar Union Memorial Hospital at Baltimore (2015)

Residency: Montefiore Medical Center (2014)

Medical School: George Washington University School of Medicine & Health Sciences (2009)

Awards

  • "Top Doc" by Baltimore magazine - 2023, 2024, 2025

Ratings and reviews

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

    4.9
  • Extent to which the care provider listened to you

    5
  • Care provider’s discussion of any proposed treatment (options, risks, benefits, etc.)

    4.9
  • Provider included you in decisions

    4.9
  • Concern the care provider showed for your questions or worries

    4.9
  • Likelihood of recommending this care provider to others

    4.9
  • Dec 18, 2025

    Great communicator! And empathetic.

  • Dec 10, 2025

    Dr Fillar is excellent, very thorough and you don't feel rushed

  • Nov 21, 2025

    Dr. Fillar is the best!!!!