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Registries: Immunization Information Systems
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Questions and Answers for Parents


Copies of records, privacy, moving, etc:

Cost and participation:

  1. What are immunization information systems?

    Also known as Immunization Registries, Immunization Information Systems (IIS) are computer systems that have information on the shots that were given to your child. Some IIS can remind you or your doctor of the next shot due to keep your child up-to-date with their immunizations.

  2. Why do immunization information systems exist?

    The purpose of the IIS is to make sure that children have all of their immunizations and that the information is there when your doctor needs it. All of the immunizations given are based on a schedule that tells providers when certain shots should be given. The immunization schedule is confusing and sometimes changes. An IIS helps doctors decide which shots should be given to your child and when.

  3. Why should I enroll my child in an IIS?

    An IIS:

    • Helps make sure that your child doesn’t miss any shots or get too many shots.
    • Assists in reminding you by mail or telephone when your child need shots.
    • Allows you to get a copy of your child’s shot record from the doctor quickly.
    • Makes sure your child has all of the shots needed to start child care or school.


  4. What information is in an IIS?

    Information in an IIS is different in every state, but most contain at least the following information: patient name (first, middle, and last); patient birth date; patient sex; patient birth state/country; mother’s name; the types and dates of vaccines given; and the date the shot was given.

  5. How is my child’s immunization record and information protected?

State law requires that information in the IIS be kept confidential. Only you, your doctor, or health care workers who can assist you have access to the information. The information will not be shared with any other people or any other agency. If you are not interested in having your child in the IIS, all you would need to do is contact your state IIS and request to “opt-out” of the registry. To find the IIS in your state, use this link:

  1. Who do I contact to see if my child is in an IIS or if I want a copy of my child’s immunization record?

CDC does not have immunization record information on children. You must contact your provider, or local or state immunization program.


  1. What happens to my child’s immunization record when I move to another state?

Inform your doctor's office that you are moving to another state. They will let the IIS know that you are moving. But first, get a copy of your child’s shot record from your doctor before you move and give this record to your new doctor. If your new doctor participates in the state IIS, your child's immunization history will be entered into the system.

  1. How much does it cost to participate in my State’s IIS? 

    There is no cost to a patient to participate in an IIS.

  2. How can I find out if my child’s doctor is participating in the IIS?

    Just ask your doctor if they use the IIS. You can also contact the IIS in your area to find out if your doctor participates.

For general immunization-related questions you also may contact the CDC Information Contact Center at 1-800-CDC-INFO (1-800-232-4636).


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This page last modified on September 9, 2005


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