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

Joseph Michael Lach, DO

Individual provider Family Medicine Physician · NPI 1225379498

Joseph Michael Lach, DO is registered under Family Practice in Joliet, Illinois. Graduated from Midwestern University, Chicago College of Osteopathic Med in 2013, 13 years ago. Practices with Health Service Systems, Inc, a 63-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
13
Trained at
Midwestern University, Chicago College of Osteopathic Med
Licensed in
IL
In the registry since
2013
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

1051 Essington Rd Ste 265
Joliet, IL 60435-2801
Phone: (815) 300-7764
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 3700 W 203rd St Ste 301, Olympia Fields, IL 60461-1182 — (708) 679-2850

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 036138941 (IL)

Record details

NPI number1225379498
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 12, 2013
Last updated in NPPESAugust 6, 2021
Certification dateAugust 6, 2021

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 2013 (13 years in practice)
Group practice Health Service Systems, Inc — 63 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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 patients329
Services billed 6,876 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $793 45 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Health Service Systems, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 63 clinicians in the practice; 12 are shown here.

Other providers in Joliet