Colorado Immunization Information System



  • Questions about the Colorado Immunization Information System portal? 
Call 1-877-CO VAX CO (1-877-268-2926) Monday through Friday, 8 a.m. to 8 p.m.; Saturday and Sunday, 9 a.m. to 6 p.m. MT.
  • Answers available in multiple languages.

Immunization records are confidential, personal medical information. The Colorado Immunization Information System (CIIS) is a lifelong immunization record tracking system under the Colorado Immunization Registry Act of 2007.

CIIS has signed agreements with all participating sites that are authorized to provide information to or access information from CIIS. CIIS and all people and entities that access immunization records are required to maintain the confidentiality of those records.

 Get a copy of your immunization record

How to get a copy of your record.

 CIIS users

Create a CIIS account.


Learn how to use CIIS and access required training courses.

 Electronic health records

Create an electronic interface between your electronic health records system and CIIS.

 Policies and procedures

Review information about CIIS, including security, confidentiality, and opt-out policies.\

 Data requests

Request data from CIIS for research purposes approved by the Institutional Review Board.