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

Dr. Azeem Mohsin Ahsan, DO

Individual provider Geriatric Medicine (Family Medicine) Physician · NPI 1861543985

Dr. Azeem Mohsin Ahsan, DO is a Family Practice in Crest Hill, Illinois. Qualified in 1983, 43 years ago. Practices with Health Service Systems, Inc, a 63-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
43
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.

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Practice location Address checks out

1640 Willow Circle Dr Ste 100
Crest Hill, IL 60435-0959
Phone: (815) 741-2525
Fax: (815) 741-2522
Show map & directions

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

Specialties & licences

Geriatric Medicine (Family Medicine) Physician (primary) Taxonomy 207QG0300X (IL)

Record details

NPI number1861543985
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedJanuary 15, 2007
Last updated in NPPESJanuary 9, 2008
Mailing address1640 Willow Circle Dr, Suite 100, Crest Hill, IL 60435-0959

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Also practisesGERIATRIC MEDICINE
Medical schoolOTHER
Graduated 1983 (43 years in practice)
Group practice Health Service Systems, Inc — 63 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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