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

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

4.9 out of 5 (2020 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

  • Acl Tear
  • Cartilage Disorder
  • Heel Tendon Repair
  • Knee Arthroscopy With Meniscectomy
  • Knee Ligament Repair
  • Knee Pain
  • Knee Replacement
  • Patella Dislocation
  • Patella Tracking Disorder
  • Rotator Cuff Disorder
  • Shoulder Arthroscopy
  • Sports Injuries
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Conditions and procedures

Conditions I treat

  • Ac Joint Arthritis
  • Acl Tear
  • Arthropathy
  • Bone Discontinuity
  • Bone Disorders
  • Bursopathy
  • Cartilage Disorder
  • Enthesopathies
  • Enthesopathy Of Knee
  • Femur Shaft Fracture
  • Golfer's Elbow
  • Hip And Thigh Tendon Injury
  • Joint Derangement
  • Joint Derangement Of Knee
  • Joint Disorder
  • Knee Fracture
  • Knee Joint And Ligament Sprain
  • Knee Pain
  • Knee Stiffness
  • Lateral Meniscus Injury
  • Lcl Sprain Or Tear
  • Lower Leg Injury
  • 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 Dislocation
  • Shoulder Fracture
  • Shoulder Joint And Ligament Sprain
  • Sports Injuries
  • Superficial Knee Injury
  • Synovium And Tendon Disorder
  • Tendinous Disorders
  • Tendonitis Of The Shoulder
  • Tennis Elbow
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Procedures I perform

  • Arthroscopic Shoulder Debridement
  • Arthroscopy Knee Loose Body Removal
  • Arthroscopy With Chondroplasty
  • Balance And Coordination Training
  • Bone Graft
  • Bone Repair
  • Cartilage Transplant
  • Closed Clavicular Fracture Treatment
  • Closed Proximal Fibula Or Shaft Fracture Treatment
  • Heel Tendon Repair
  • Intertrochanteric Fracture Treatment
  • Joint Arthroscopy
  • Knee Arthroscopy With Meniscectomy
  • Knee Injection
  • Knee Injury Treatment
  • Knee Joint Diagnostic Drainage
  • Knee Ligament Repair
  • Knee Realignment
  • Knee Replacement
  • 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
  • Shoulder Arthroscopy
  • Shoulder Dislocation Treatment
  • Shoulder Instability Repair
  • Sports Performance Training
  • Surgical Treatment
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Practice locations

Distance from Change LocationEnter your Location

2118 Greenspring Dr
Ste 210
Timonium, MD, 21093

410-554-2161

Fax 667-359-3004

Get Directions

miles away

Fax 667-359-3004

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

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

Education

Board Certification: American Board of Orthopedic Surgery, Orthopedic 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
  • May 21, 2026

    Dr Fillar explained the procedure all the way through and was attentive and responsive to my questions. We discussed options, pros and cons of various treatments. I would recommend Dr. Fillar to anyone experiencing knee problems.

  • May 17, 2026

    Great experience with her

  • May 6, 2026

    Very good excellent