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

William Register, DO

Individual provider Internal Medicine Physician · NPI 1912384306

William Register, DO is a Critical Care (Intensivists) in Elk Grove Village, Illinois. Graduated from University of North Texas Hsc, College of Osteopathic Med in 2015, 11 years ago. Practices with Alexian Brothers Medical Group Specialty Care, a 23-clinician group and accepts Medicare assignment. Licensed in Illinois and Indiana.

Years since qualifying
11
Trained at
University of North Texas Hsc, College of Osteopathic Med
Licensed in
IL, IN
In the registry since
2015
Specialties on file
3
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

800 Biesterfield Rd Ste 510
Elk Grove Village, IL 60007-3367
Phone: (847) 981-3660
Show map & directions

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

Specialties & licences

Critical Care Medicine (Internal Medicine) Physician (primary) Taxonomy 207RC0200X · Licence 036155248 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036155248 (IL)
Hospitalist Physician Taxonomy 208M00000X · Licence 02005686A (IN)

Record details

NPI number1912384306
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 5, 2015
Last updated in NPPESOctober 11, 2024
Certification dateOctober 11, 2024

Medicare enrollment

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

Medicare specialtyCRITICAL CARE (INTENSIVISTS)
Medical schoolUNIVERSITY OF NORTH TEXAS HSC, COLLEGE OF OSTEOPATHIC MED
Graduated 2015 (11 years in practice)
Group practice Alexian Brothers Medical Group Specialty Care — 23 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Elk Grove Village