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

Dr. Nicholas Deignan, DC

Individual provider Chiropractor · NPI 1366740128

Dr. Nicholas Deignan, DC is registered under Chiropractic in Barrington, Illinois. Qualified in 2010, 16 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Illinois and Ohio.

Years since qualifying
16
Licensed in
IL, OH
In the registry since
2011
Specialties on file
2
What do these letters mean?
DC — Doctor of Chiropractic
A licensed chiropractor.

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Practice location Address checks out

777 Lake Zurich Rd 105
Barrington, IL 60010-3106 Not confirmed with CMS for 12 years — call before visiting
Phone: (847) 277-2990
Fax: (847) 277-2991
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Chiropractor (primary) Taxonomy 111N00000X · Licence 038011878 (IL)
Chiropractor Taxonomy 111N00000X · Licence 4200 (OH)

Record details

NPI number1366740128
Entity typeIndividual (Type 1)
GenderMale
Credentials DC
Sole proprietorYes
NPI enumeratedMarch 3, 2011
Last updated in NPPESOctober 22, 2014

Medicare enrollment

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

Medicare specialtyCHIROPRACTIC
Medical schoolOTHER
Graduated 2010 (16 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 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 patients15
Services billed 175 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.

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