Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dorwyn Craig Collier, D.O.

General Practice Physician in Elkhart, IN · enumerated 2007 · practices at Windsor Workcare.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1326160425

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Registry record

Entity type Individual (Type 1)

Name Dorwyn Craig Collier

Credential D.O.

Sex Male

Practice address Elkhart, IN, 46514

Phone (574) 266-6555

Fax (574) 266-6888

Enumeration date Apr 6, 2007

Last updated in NPPES Nov 30, 2009

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

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 02001521A (IN) Secondary

2083P0500X Preventive Medicine/Occupational Environmental Medicine Physician Allopathic & Osteopathic Physicians · License 02001521A (IN) Secondary

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 02001521A (IN) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
02001521A	Other	IN	LICENSE NUMBER
200097620	Medicaid	IN	-

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.

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Frequently asked questions

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.

What specialty is Dorwyn Collier?

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

Other providers at this practice address

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Windsor Workcare Occupational Medicine Clinic/Center · Elkhart, IN NPI 1255520706

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-11-30.