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

Christopher Unrein DO PC

Organization Geriatric Medicine (Internal Medicine) Physician · NPI 1821191628

Christopher Unrein DO PC is a Geriatric Medicine (Internal Medicine) Physician in Castle Rock, Colorado. Registered with an NPI since 2006.

In the registry since
2006
What do these letters mean?
PC — Professional corporation
A form of business registration, not a clinical qualification.

See every abbreviation used in this directory →

Practice location Address checks out

1297 S Perry St
Castle Rock, CO 80104-1977
Phone: (720) 529-1919
Fax: (720) 482-1387
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Geriatric Medicine (Internal Medicine) Physician (primary) Taxonomy 207RG0300X

Record details

NPI number1821191628
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Christopher Unrein — President/Owner · (720) 529-1919
NPI enumeratedSeptember 7, 2006
Last updated in NPPESNovember 7, 2007
Mailing address1978 S Garrison St, 101, Lakewood, CO 80227-2282