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

James A Lengemann, MD

Individual provider Internal Medicine Physician · NPI 1447247572

James A Lengemann, MD is an Internal Medicine in Naperville, Illinois. Graduated from Loyola University of Chicago, Stritch School of Medicine in 1995, 31 years ago. Practices with Endeavor Health Medical Group, a 3,348-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
31
Trained at
Loyola University of Chicago, Stritch School of Medicine
Licensed in
IL
In the registry since
2005
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

1331 W 75th St Ste 201
Naperville, IL 60540-9311
Phone: (630) 527-5000
Fax: (630) 527-5440
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036096442 (IL)

Record details

NPI number1447247572
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 4, 2005
Last updated in NPPESMarch 5, 2021
Certification dateMarch 5, 2021
Mailing address1331 W 75th St Ste 201, Naperville, IL 60540-9311

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolLOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated 1995 (31 years in practice)
Group practice Endeavor Health Medical Group — 3348 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Naperville