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

Dr. William Gerard O'Brien, DC

Individual provider Chiropractor · NPI 1235217795

Dr. William Gerard O'Brien, DC is a Chiropractic in Glendale Heights, Illinois. Qualified in 2003, 23 years ago. Accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
23
Licensed in
IL
In the registry since
2006
What do these letters mean?
DC — Doctor of Chiropractic
A licensed chiropractor.

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Practice location Address checks out

320 E Army Trail Rd
Glendale Heights, IL 60139-1757
Phone: (630) 529-6111
Fax: (630) 529-6192
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Chiropractor (primary) Taxonomy 111N00000X (IL)

Record details

NPI number1235217795
Entity typeIndividual (Type 1)
GenderMale
Credentials DC
Sole proprietorNo
NPI enumeratedNovember 1, 2006
Last updated in NPPESJuly 8, 2007
Mailing address309 Bishop Ct, Bartlett, IL 60103-2983

Medicare enrollment

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

Medicare specialtyCHIROPRACTIC
Medical schoolOTHER
Graduated 2003 (23 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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