About
MARK THEISS, M.D. is an orthopedic surgery located at 3300 GALLOWS RD in FALLS CHURCH, VA.
Mark Theiss is one of 18 orthopedic providers listed in FALLS CHURCH, VA on AdvOrtho.
Practice at a glance
In 2024, 58% of Mark Theiss's identifiable Medicare procedure volume was hip work. Their most frequent service was aspiration and/or injection of fluid from large joint for 131 Medicare patients.
Distinct procedures
3
Medicare patients
151
busiest single service
Care setting
99% office
mostly outpatient
Most-performed procedures, 2024
Aspiration and/or injection of fluid from large joint
216
131 patients · above the state median of 140
Replacement of thigh bone and hip joint with prosthesis
18
16 patients · below the state median of 39
Replacement of knee joint, both sides of knee
13
12 patients · below the state median of 43
Training and practice
Mark Theiss has been in practice since 1975, after graduating from Georgetown University School of Medicine.
- Practices with Inova Health Care Services (1,821 clinicians)
- Affiliated with Inova Alexandria Hospital and Inova Fair Oaks Hospital
Registry record
Registered subspecialty
- Licensed in Virginia
- Practices within a group or organization
Where this comes from
Procedure volumes:CMS Medicare Physician & Other Practitioners, 2024. Fee-for-service claims only, so they exclude privately insured, Medicare Advantage and pediatric patients - volume is not comparable across practices with different patient mixes. These are billing records, not outcomes.
Training and practice: CMS Doctors and Clinicians list. A graduation year is when training finished, not years of orthopedic experience or a board certification. Affiliations come from Medicare enrollment and may be incomplete.
Registry details: NPPES. Subspecialties are self-reported at registration, not a board certification.
Credentials: Doctor of Medicine (MD)
An MD degree indicates completion of a medical doctorate program focused on allopathic medicine. MDs complete four years of medical school followed by residency training in their chosen specialty. Orthopedic surgery residencies typically last five years and include extensive training in surgical and non-surgical treatment of musculoskeletal conditions.
Office Information
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Profile information is sourced from the public CMS NPI Registry. Contact the office directly to confirm current availability and insurance acceptance. Providers can update this profile to reflect their current practice.
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