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

William J Thieman MD PC

Organization Family Medicine Physician · NPI 1457536187

William J Thieman MD PC provides Family Medicine Physician services in Fort Collins, Colorado. Licensed in Colorado. Registered with an NPI since 2007.

Licensed in
CO
In the registry since
2007
What do these letters mean?
PC — Professional corporation
A form of business registration, not a clinical qualification.

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Practice location Address checks out

1217 E Elizabeth Ste 1
Fort Collins, CO 80524-4040 Not confirmed with CMS for 18 years — call before visiting
Phone: (970) 484-7245
Fax: (970) 484-1398
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 19190 (CO)

Record details

NPI number1457536187
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Eileen Thieman — Office Manager Corporate Secretary · (970) 484-7245
NPI enumeratedDecember 31, 2007
Last updated in NPPESDecember 31, 2007
Mailing address1217 East Elizabeth, Suite 1, Fort Collins, CO 80524-4040

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