Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Mr. Ather Ali, MD

Individual provider Family Medicine Physician · NPI 1518308246

Mr. Ather Ali, MD is registered under Family Practice in Crystal Lake, Illinois. Qualified in 2007, 19 years ago. Practices with Mercy Health System Corporation, a 751-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Illinois and Wisconsin.

Years since qualifying
19
Licensed in
IL, WI
In the registry since
2013
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

875 Route 31
Crystal Lake, IL 60014
Phone: (779) 220-5500
Show map & directions

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

Additional practice locations (3)

  • 901 Grant St, Harvard, IL 60033-1821 — (815) 943-5431
  • 1s450 Summit Ave Ste 165, Oakbrook Terrace, IL 60181-3952 — (630) 468-0442
  • 515 22nd Ave, Monroe, WI 53566-1569 — (608) 324-2000

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 036144860 (IL)
Family Medicine Physician Taxonomy 207Q00000X · Licence 66068 (WI)
Family Medicine Physician Taxonomy 207Q00000X · Licence 036144860 (IL)

Record details

NPI number1518308246
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 10, 2013
Last updated in NPPESJuly 10, 2024
Certification dateJuly 10, 2024

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Also practisesHOSPITALIST
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Group practice Mercy Health System Corporation — 751 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients30
Services billed 31 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Mercy Health System Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 751 clinicians in the practice; 12 are shown here.

Other providers in Crystal Lake