Allison Griner Sewell, MMS PA| General Surgery | MedStar Health
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Allison Griner Sewell

Allison Griner Sewell, MMS PA
Provider is directly employed by MedStar Health

4.9 out of 5 (68 reviews)

Specialties: General Surgery

Languages: English

Clinical areas of focus

  • Choledocholithiasis
  • Diaphragmatic Hernia
  • Gallstones
  • Incisional Hernia
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Conditions and procedures

Conditions I treat

  • Abdomen, Lower Back, Pelvis, And Genital Open Wound
  • Abdominal Adhesions
  • Abdominal Cancer
  • Abdominal Wall Defects
  • Accessory Sinuses Cancer
  • Acquired Absence Of Organs
  • Acute Cholecystitis
  • Acute Pancreatitis
  • Appendix Rupture
  • Belly Button Hernia
  • Biliary Tract Disease
  • Body Mass Index
  • Boils
  • Choledocholithiasis
  • Chronic Appendicitis
  • Complications From Weight Loss Surgery
  • Complications Of Procedures
  • Cutaneous Abscess, Furuncle And Carbuncle
  • Diaphragmatic Hernia
  • Diseases Of Appendix
  • Duodenal Ulcer
  • Enlarged Thyroid Gland
  • Fatty Tumor Near The Intestine
  • Gallstones
  • Hernia Near A Previous Surgical Scar
  • Hernia Near The Groin
  • Herniated Stomach
  • Hole In The Diaphragm
  • Incisional Hernia
  • Infected Sweat Gland
  • Infected Tooth
  • Inflamed Pancreas
  • Intestinal Stenosis
  • Long Term Drug Therapy
  • Mammary Dysplasia
  • Obesity
  • Ovarian Cysts And Benign Neoplasms
  • Pilar Cysts
  • Problems After Surgery
  • Reaction To Surgery
  • Skin And Soft Tissue Infections
  • Skin And Subcutaneous Tissue Complications
  • Stomach Problems
  • Swollen Spleen
  • Tendinous Disorders
  • Thyroid Nodules
  • Trauma To The Abdomen
  • Umbilical Hernia In Children
  • Ventral Hernia
  • Weight Loss Surgery Complications
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Procedures I perform

  • Abdominal Organ Transplantation
  • Abdominal Wall Reconstruction
  • Adrenal Surgery
  • Amputation
  • Aneurysm Repair
  • Angioplasty
  • Aortic Valve Repair
  • Arterial Thrombolysis
  • Artificial Liver Therapy
  • Atherectomy
  • Bladder Neck Reconstruction
  • Bladder Stone Removal
  • Bone Graft
  • Breast Biopsy
  • Breast Reconstruction
  • Cardiac Surgical Procedures
  • Carotid Endarterectomy
  • Cervical Lymph Node Dissection
  • Cholecystectomy
  • Colon Resection
  • Colostomy
  • Dialysis
  • Dialysis Graft Creation
  • Diverting Colostomy
  • Endovascular Surgery
  • Endovenous Laser Therapy
  • Enterectomy
  • Enterocele Repair
  • Enteroenterostomy
  • Femoral Nerve Transfer
  • Flap Surgery
  • Gallbladder Removal
  • Ganglion Cyst Excision
  • Gastrectomy
  • Gastric Artery Embolization
  • Gastric Plication
  • Gastric Surgery
  • Gastric Switch
  • Gastroduodenostomy
  • Gastrointestinal Tube Placement
  • Gastrojejunostomy
  • Gastrostomy
  • Gelfoam Embolization
  • Heel Tendon Repair
  • Hemipelvectomy
  • Hemorrhoidectomy
  • Ileostomy
  • Iliopopliteal Bypass
  • Inferior Vena Cava Filter Placement
  • Intraoperative Frozen Section
  • Isolated Limb Perfusion
  • Jejunostomy
  • Laparoscopic Revision Of Gastric Restrictive Procedure
  • Laparoscopic Splenectomy
  • Liver Resection
  • Liver Transplant
  • Lobectomy
  • Local Tissue Transfer
  • Lumpectomy
  • Lymph Node Transfer
  • Lymphangiography
  • Lymphatic Surgery
  • Mastectomy
  • Mastopexy
  • Melanoma Removal
  • Melanoma Resection
  • Microwave Ablation
  • Neobladder Creation
  • Oral Surgery
  • Pancreas And Kidney Transplant
  • Pancreas Transplant
  • Parathyroid Tumor Surgery
  • Parotidectomy
  • Pelvic Exenteration
  • Percutaneous Tumor Chemoembolization
  • Prostate Artery Embolization
  • Pulmonary Thromboendarterectomy
  • Radiofrequency Thermoablation
  • Repair Of Anterior Abdominal Hernia
  • Retroperitoneal Tumor Removal
  • Salvage Surgery
  • Sentinel Lymph Node Mapping
  • Skin Graft
  • Small Bowel Resection
  • Small Bowel Transplant
  • Spleen Removal
  • Splenectomy
  • Stent Placement
  • Stenting Of An Artery
  • Superior Vena Cava Filter Placement
  • Surgical Oncology Surgery
  • Therasphere Therapy
  • Thoracic Duct Embolization
  • Thoracostomy
  • Thrombolysis
  • Thyroidectomy
  • Tracheostomy
  • Transarterial Embolization
  • Transitional Cell Carcinoma Treatment
  • Tumor Debulking
  • Tumor Embolization
  • Tumor Resection
  • Uterine Fibroid Embolization
  • Varicocele Embolization
  • Varicose Vein Stripping
  • Varicose Vein Treatment
  • Vascular Access Creation
  • Vascular Anastomosis
  • Vascular Reconstruction
  • Vein Sclerotherapy
  • Ventral Hernia Repair With Mesh
  • Wound Debridement
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Practice locations

Distance from Change Location Enter your Location

18109 Prince Philip Dr
Ste B100
Olney, MD, 20832

301-774-8962
Get Directions

miles away

Fax 855-778-6897

Insurance

This list represents the major payors accepted by MedStar Health.

NOTE: Payor contracts change and not all plans associated with a payor may be covered. Payors may offer multiple plans. If you have a question related to your insurance, please contact your insurance plan directly. Contact information is located on your health insurance ID card.

*Denotes limited participation. Specific providers and practices may NOT be participating. Please contact your insurance plan directly.

  • List of insurance plans we accept
    • Aetna
    • CareFirst BlueCross BlueShield of Maryland
    • Cigna Health Care
    • Kaiser Permanente*
    • MedStar Select (Administered by CareFirst)
    • United HealthCare
    • Aetna
    • CareFirst BlueCross BlueShield of Maryland
    • Healthspring
    • Humana
    • Medicare & Railroad Medicare
    • United HealthCare
    • Aetna Better Health of Maryland *
    • Medical Assistance/Medicaid
    • MedStar Family Choice MD
    • Priority Partners *
    • United HealthCare Community Health Plan MD
    • Wellpoint MD
    • AmeriHealth Caritas
    • Health Services For Children With Special Needs (HSCSN)
    • Medical Assistance/Medicaid
    • MedStar Family Choice DC
    • Johns Hopkins Employer Health Programs *
    • Johns Hopkins US Family Health Plan *
    • MultiPlan
    • Private Healthcare Systems
    • Tricare/Humana Military
    • VA Community Care Network (VACCN)

Education

Board Certification: National Committee on Certification of Physician Assistants, Certification of Physician Assistants

Graduate: Mercer University (2022)

Hospital affiliations

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

    4.9
  • Care provider’s discussion of any proposed treatment (options, risks, benefits, etc.)

    4.9
  • Provider included you in decisions

    4.8
  • Concern the care provider showed for your questions or worries

    4.9
  • Likelihood of recommending this care provider to others

    4.9
  • Jul 21, 2026

    Excellent care.

  • May 30, 2026

    She was great! Very pleasant.

  • Apr 28, 2026

    Very good