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

Jackson T Knappen, MD

Individual provider Internal Medicine Physician · NPI 1811639081

Jackson T Knappen, MD is a Hospitalist in Chicago, Illinois. Qualified in 2022, 4 years ago. Practices with Northwestern Medical Faculty Foundation, a 4,394-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
4
Licensed in
IL
In the registry since
2022
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

820 S Wood St Ste 100
Chicago, IL 60612-4325
Phone: (312) 996-2933
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 251 E Huron St Ste 16-738, Chicago, IL 60611-2908 — (312) 926-5924

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 036171856 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 125081050 (IL)

Record details

NPI number1811639081
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 8, 2022
Last updated in NPPESJuly 8, 2025
Certification dateJuly 8, 2025
Mailing address820 S Wood St Ste 100, Chicago, IL 60612-4325

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Group practice Northwestern Medical Faculty Foundation — 4394 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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