Provider services: 866-274-5888 (TTY: 711), Monday – Friday, 8 a.m. – 8 p.m. Eastern time

Availity Essentials customer service/tech support: 800-282-4548

For information about joining our network

Home and community-based services providers


Physical health network requests


Behavioral health network requests


Prior authorization requests

Physician-administered medications prior authorization requests: 866-274-5888, Monday – Friday, 8 a.m. –8 p.m. Eastern time

Provider correspondence
Humana Healthy Horizons in Indiana
Attn: Provider Correspondence
P.O Box 14169
Lexington, KY 40512

Provider informal claim disputes
Humana Healthy Horizons in Indiana Informal Claim Dispute
P.O. Box 14601
Lexington, KY 40512-4601

Provider formal disputes

Formal disputes can be submitted two ways.

  • In writing by mailing to:

    Humana Healthy Horizons in Indiana
    Attn: Formal Disputes
    201 North Illinois Street
    Suite 1200
    Indianapolis, IN 46204

  • By email

    IndianaFormalDispute@humana.com

If you need support after hours, please call 866-274-5888 (TTY:711).