About me
S. Mohammed Karim, MD is a board-certified orthopaedic surgeon who is dual fellowship trained in spine surgery and orthopaedic oncology—one of only a handful of surgeons nationwide with such training and experience. At MedStar Health, he specializes in the surgical treatment of patients with bone and soft tissue tumors / cancers. He sees patients at MedStar Franklin Square Medical Center and MedStar Union Memorial Hospital.
As a comprehensive musculoskeletal and spinal oncology surgeon, Dr. Karim enjoys helping those with both primary tumors (such as sarcomas) and metastatic tumors throughout the entire body including the spine, sacrum, pelvis, and extremities. He performs surgery for tumors causing spinal cord compression; spinal fractures/instability from tumors; pathologic or impending fractures in the arms, legs, and pelvis; and malignant bone and soft tissue tumors in all parts of the body. Dr. Karim believes firmly that cancer care is a “team sport” and works closely with medical oncologists, radiation oncologists, pathologists, radiologists, plastic surgeons, and other surgical subspecialists of MedStar Health to provide the best treatment possible to each patient. In addition to cancer patients, he surgically treats those with degenerative spine conditions (such as spinal stenosis, spondylolisthesis, cervical myelopathy, and bulging discs), spinal trauma, spinal cord injuries, and spinal infections.
In addition to caring for patients, Dr. Karim conducts clinical research to improve the outcomes of patients with musculoskeletal and spinal tumors. His research has been published in peer-reviewed journals and presented at international conferences. Dr. Karim is a member of the AOSpine Knowledge Forum Tumor – an international group of surgeons and other cancer specialists who perform research to improve the care of patients with spinal tumors. He is also a member of the American Academy of Orthopaedic Surgeons and the North American Spine Society, for which he holds Committee Appointments in Spine Oncology, Robotics and Enabling Technology, and Resident and Fellow Education. He has a keen interest in education and enjoys teaching and mentoring medical students, residents, and fellows both in and out of the operating room. Beyond his medical career, Dr. Karim is a proud member of the Civil Air Patrol.
Clinical areas of focus
- Bone Biopsy
- Bone Cancer Surgery
- Bone Cyst
- Bone Metastasis
- Bone Metastasis Treatment
- Bone Sarcoma Surgery
- Flap Surgery
- Ganglion Cyst Excision
- Mesothelioma
- Multiple Myeloma
- Resection Of Soft Tissue Tumor
- Salvage Surgery
- Spinal Spondylolysis Treatment
Conditions and procedures
Conditions I treat
- Angiosarcoma
- Bladder Carcinoma
- Bone Cancer
- Bone Cyst
- Bone Density Disorder
- Bone Discontinuity
- Bone Lesions
- Bone Metastasis
- Bone Sarcoma
- Bone Tumor
- Brown Tumor
- Cervical Spine Tumor
- Chordoma
- Femur Shaft Fracture
- Fibrosarcoma
- Hand Tremor
- Lipoma
- Liposarcoma
- Lumbar Spine Tumor
- Malignant Neoplasm Of Connective And Soft Tissue
- Mesothelioma
- Metastatic Bone Disease
- Multiple Myeloma
- Neoplasm Of Uncertain Behavior
- Nerve Tumors
- Pathological Fracture
- Pelvic Tumor
- Sarcomas Of Skin And Soft Tissue
- Skull Base Tumor
- Soft Tissue Sarcoma
- Spinal Metastases
- Spine Tumor
- Thigh Fracture
- Thoracic Spine Tumor
- Wrist And Hand Tumors
Procedures I perform
- Amputation Revision
- Bone Biopsy
- Bone Cancer Surgery
- Bone Graft
- Bone Metastasis Treatment
- Bone Sarcoma Surgery
- Ewing's Sarcoma Treatment
- Femur Excision
- Femur Fracture Stabilization
- Flap Surgery
- Forequarter Amputation
- Ganglion Cyst Excision
- Heel Tendon Repair
- Hindquarter Amputation
- Hip Distraction
- Hip Replacement For Metastatic Bone Disease
- Knee Amputation
- Metastatic Bone Disease Treatment
- Pelvic Tumor Resection
- Proximal Humerus Replacement
- Reconstruction For Bone Defects
- Resection Of Soft Tissue Tumor
- Salvage Surgery
- Soft Tissue Sarcoma Surgery
- Spinal Spondylolysis Treatment
- Toe Amputation
- Vertebroplasty For Vertebral Compression Fractures
Practice locations
Distance from Change Location Enter your Location
3333 N Calvert St
Ste 655
Baltimore, MD, 21218
2118 Greenspring Dr
Ste 110
Timonium, MD, 21093
9101 Franklin Square Dr
Ste 200
Baltimore, MD, 21237
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.
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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)
Videos
Education
Board Certification: American Board of Orthopedic Surgery, Orthopedic Surgery
Fellowship: Mayo Clinic College of Medicine & Science (2021)
Fellowship: University of British Columbia GME (2020)
Residency: Massachusetts General Hospital (2019)
Medical School: Harvard Medical School (2014)
Awards
- Baltimore Magazine, Top Doc, 2025
