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

Dr. Mark Alan Washington, MD

Individual provider Internal Medicine Physician · NPI 1396079406

Dr. Mark Alan Washington, MD is an Internal Medicine in Gary, Indiana. Graduated from Howard University College of Medicine in 2009, 17 years ago. Practices with Hospital Care Group PC, a 30-clinician group and accepts Medicare assignment. Licensed in Indiana.

Years since qualifying
17
Trained at
Howard University College of Medicine
Licensed in
IN
In the registry since
2009
Specialties on file
3
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

600 Grant St
Gary, IN 46402-6001
Phone: (121) 988-6400
Show map & directions

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

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 01071818A (IN)
Internal Medicine Physician Taxonomy 207R00000X · Licence 01071818A (IN)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1396079406
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 22, 2009
Last updated in NPPESFebruary 18, 2020
Certification dateFebruary 18, 2020
Mailing address7731 Delaware Ct, Merrillville, IN 46410-5636

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolHOWARD UNIVERSITY COLLEGE OF MEDICINE
Graduated 2009 (17 years in practice)
Group practice Hospital Care Group Pc — 30 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Other providers in Gary