Contact Us

Our office hours are Monday through Friday, 8 a.m. to 5 p.m. (HST).

General Information:
Phone:
(808) 522-7500
Fax:
(808) 532-3396
O‘ahu
Neighbor Islands and Mainland (toll-free)
For Provider Assistance (member eligibility, claims questions, general information, etc.):
Phone:
O‘ahu: (808) 532-6989
Neighbor Islands and Mainland (toll-free): 1-800-851-7110
Fax:
O‘ahu: (808) 532-3396
Neighbor Islands and Mainland (toll-free): 1-800-844-7522
For Precertification Authorization (Medical, Surgical or Behavioral Health Services):
Phone:
O‘ahu: (808) 532-6989
Neighbor Islands and Mainland (toll-free): 1-800-851-7110
Fax:
O‘ahu: (808) 532-6999
Neighbor Islands and Mainland (toll-free): 1-800-688-4040
For Members:
Phone:
O‘ahu: (808) 522-7560
Neighbor Islands and Mainland (toll-free): 1-800-856-4668

By Mail:

MDX HAWAI'I
500 ALA MOANA BLVD STE 2200
HONOLULU HI 96813-4993

We are located at Waterfront Plaza (formerly Restaurant Row) in downtown Honolulu. Our office is in Tower 2, Suite 200.