Dr. Douglas Allen Koehler, DDS

Dr. Douglas Allen Koehler is a General Practice Dentistry provider (Dentist) practicing in Winfield, IL, registered in the NPPES registry with NPI 1366504938 since 2006. The credential DDS stands for Doctor of Dental Surgery. Practices at Winfield Family Practice, L.L.C. (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1366504938
Entity type	Individual (Type 1)
Name	Dr. Douglas Allen Koehler
Credential	DDS
Sex	Male
Practice address	Winfield, IL, 60190
Phone	6306532377
Fax	6306532792
Enumeration date	2006-12-13
Last updated in NPPES	2007-07-08

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

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
1223G0001X	General Practice Dentistry	Primary	—	IL

DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Copy-ready billing details

Provider: Douglas Koehler, DDS
NPI: 1366504938
Taxonomy: 1223G0001X (General Practice Dentistry)
Address: Winfield, IL, 60190

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1407941503	Winfield Family Practice, L.L.C.	Organization	General Practice Physician	Winfield, IL

Verify this record

Cross-check NPI 1366504938 against the authoritative CMS record: view Dr. Douglas Allen Koehler 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 specialty is Douglas Koehler?

Douglas Koehler is registered in NPPES with the primary taxonomy of General Practice Dentistry. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.