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

Dr. John Lambert Flach, DO

Individual provider Neurology Physician · NPI 1386223089

Dr. John Lambert Flach, DO is a Neurology in Arlington Heights, Illinois. Graduated from Lincoln Mem Univ, Debusk Col of Osteopathic Med in 2021, 5 years ago. Practices with Endeavor Health Medical Group, a 3,348-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Illinois.

Years since qualifying
5
Trained at
Lincoln Mem Univ, Debusk Col of Osteopathic Med
Licensed in
IL
In the registry since
2021
Specialties on file
2
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

880 W Central Rd
Arlington Heights, IL 60005-2355
Phone: (847) 618-4430
Fax: (847) 618-0786
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1120 W Michigan St # Cl642, Indianapolis, IN 46202-5209 — (317) 278-2686

Specialties & licences

Neurology Physician (primary) Taxonomy 2084N0400X · Licence 036173195 (IL)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence 036173195 (IL)

Record details

NPI number1386223089
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 8, 2021
Last updated in NPPESSeptember 24, 2025
Certification dateSeptember 24, 2025
Mailing address2650 Ridge Ave Ste 1223, Evanston, IL 60201-1700

Medicare enrollment

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

Medicare specialtyNEUROLOGY
Medical schoolLINCOLN MEM UNIV, DEBUSK COL OF OSTEOPATHIC MED
Graduated 2021 (5 years in practice)
Group practice Endeavor Health Medical Group — 3348 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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