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

Dr. Gregory J Shirk, DC

Individual provider Chiropractor · NPI 1629064464

Dr. Gregory J Shirk, DC is a Chiropractic in Mason City, Iowa. Graduated from Palmer College Chiropractic - Davenport in 1995, 31 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Iowa.

Years since qualifying
31
Trained at
Palmer College Chiropractic - Davenport
Licensed in
IA
In the registry since
2005
What do these letters mean?
DC — Doctor of Chiropractic
A licensed chiropractor.

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Practice location Address checks out

630 1st St NW
Mason City, IA 50401-2947
Phone: (641) 423-4455
Fax: (641) 423-0354
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Chiropractor (primary) Taxonomy 111N00000X · Licence A05882 (IA)

Record details

NPI number1629064464
Entity typeIndividual (Type 1)
GenderMale
Credentials DC
Sole proprietorYes
NPI enumeratedSeptember 27, 2005
Last updated in NPPESNovember 19, 2014
Mailing address630 1st St Nw, Mason City, IA 50401-2947

Medicare enrollment

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

Medicare specialtyCHIROPRACTIC
Medical schoolPALMER COLLEGE CHIROPRACTIC - DAVENPORT
Graduated 1995 (31 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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