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

John Ernzen, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1346615663

John Ernzen, MD is a Psychiatry in Chicago, Illinois. Graduated from Northwestern University Feinberg Medical School in 2019, 7 years ago. Practices with 2014 Health LLC, a 23-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
7
Trained at
Northwestern University Feinberg Medical School
Licensed in
IL
In the registry since
2015
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

225 E Chicago Ave
Chicago, IL 60611-2991
Phone: (312) 227-4000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 240 E Huron St, Chicago, IL 60611-2909 — (312) 503-7975
  • 1740 W Taylor St, Chicago, IL 60612-7232 — (866) 600-2273
  • 2650 Ridge Ave., Evanston, IL 60201-1718 — (847) 570-2540

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 036157705 (IL)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1346615663
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 11, 2015
Last updated in NPPESMay 27, 2022
Certification dateMay 12, 2022

Medicare enrollment

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

Medicare specialtyPSYCHIATRY
Medical schoolNORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL
Graduated 2019 (7 years in practice)
Group practice 2014 Health Llc — 23 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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