Dr. William G Hemmer, DC

Dr. William G Hemmer is a Chiropractor provider (Chiropractor) practicing in Tuscola, IL, registered in the NPPES registry with NPI 1164611786 since 2007. The credential DC stands for Doctor of Chiropractic. Practices at Boyd Optometric, Inc. (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1164611786
Entity type	Individual (Type 1)
Name	Dr. William G Hemmer
Credential	DC
Sex	Male
Practice address	Tuscola, IL, 61953
Phone	2172532370
Fax	2172536545
Enumeration date	2007-10-19
Last updated in NPPES	2007-10-19

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
111N00000X	Chiropractor	Primary	038-006250	IL

DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Copy-ready billing details

Provider: William Hemmer, DC
NPI: 1164611786
Taxonomy: 111N00000X (Chiropractor)
Address: Tuscola, IL, 61953

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1326008137	Jamison Boyd	Individual	Optometrist	Tuscola, IL
1750619037	Boyd Optometric, Inc.	Organization	Optometrist	Tuscola, IL
1902105315	Nicholas Micka	Individual	Chiropractor	Tuscola, IL

Verify this record

Cross-check NPI 1164611786 against the authoritative CMS record: view Dr. William G Hemmer on the official NPPES registry .

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.

Frequently asked questions

What is the NPI number for William Hemmer?

The National Provider Identifier (NPI) for William Hemmer is 1164611786, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Hemmer practice?

The practice location on file with NPPES is in Tuscola, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-10-19.