Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mark L Stillwell, MD

Individual provider Infectious Disease Physician · NPI 1568459451

Mark L Stillwell, MD is an Infectious Disease in Fort Smith, Arkansas. Graduated from University of Maryland School of Medicine in 1982, 44 years ago. Practices with Mercy Clinic Fort Smith Communities, a 350-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Arkansas.

Years since qualifying
44
Trained at
University of Maryland School of Medicine
Licensed in
AR
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

6801 Rogers Ave Fl 5
Fort Smith, AR 72903-4067
Phone: (479) 274-4100
Fax: (479) 274-4199
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2900 Medical Center Parkway, Bentonville, AR 72712 — (479) 553-2121

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence N7411 (AR)

Record details

NPI number1568459451
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 5, 2005
Last updated in NPPESOctober 18, 2024
Certification dateOctober 18, 2024
Mailing addressPo Box 776084, Chicago, IL 60677-6084

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINFECTIOUS DISEASE
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MARYLAND SCHOOL OF MEDICINE
Graduated 1982 (44 years in practice)
Group practice Mercy Clinic Fort Smith Communities — 350 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Fort Smith