First Commonwealth, a wholly owned subsidiary of Guardian, is headquartered in
Chicago, Illinois. We offer our dental products throughout the Midwest, including
Illinois, Indiana, Michigan, Missouri, and Wisconsin. For more specific information about
our dental services, please click on the appropriate link on the left.
Employees of Cook County can click on the link to the left at anytime or
the link in this sentence for assistance and for the exclusive online provider directory.
If you cannot find what you need here, please contact us:
| By Phone: |
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| Our general office number: |
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(312) 993-1000 |
| First Commonwealth DHMO member support: |
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(866) 494-4542 |
| First Commonwealth PPO member support: |
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(866) 302-4542 |
| Provider support: |
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(800) 562-1366 |
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By Email: Contact us via the Web. |
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By Mail:
First Commonwealth
550 W. Jackson, Suite 800
Chicago, IL 60661
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By Fax:
312-279-5140
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Legal Disclaimer |
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