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

Dr. Brian J Lenahan, DO

Individual provider Family Medicine Physician · NPI 1053462788

Dr. Brian J Lenahan, DO is a Family Practice in Naperville, Illinois. Graduated from Midwestern University, Chicago College of Osteopathic Med in 2003, 23 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
23
Trained at
Midwestern University, Chicago College of Osteopathic Med
Licensed in
IL
In the registry since
2007
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

4003 S Route 59
Naperville, IL 60564-5802
Phone: (888) 693-6437
Show map & directions

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

Additional practice locations (1)

  • 885 Roosevelt Rd Ste 100, Glen Ellyn, IL 60137-6141 — (630) 384-6200

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 036114526 (IL)

Record details

NPI number1053462788
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJanuary 16, 2007
Last updated in NPPESFebruary 26, 2024
Certification dateFebruary 26, 2024
Mailing addressPo Box 713260, Chicago, IL 60677-1260

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolMIDWESTERN UNIVERSITY, CHICAGO COLLEGE OF OSTEOPATHIC MED
Graduated 2003 (23 years in practice)
Group practice Northwestern Medical Faculty Foundation — 4394 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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