Contact Provider Services

Call CentersPhoneHours
Provider Services Call Center 410-767-5503 or 1-800-445-1159Monday from 8:30 a.m. to noon.
Tuesday, Wednesday and Friday from 8:30 a.m. to 4 p.m.
Maryland ePREP Hotline1-844-463-7768Monday through Friday from 9:00 a.m. to 5:00 p.m.
Closed on state holidays.


Contact by TopicEmailPhone
EDI, electronic
Enrollment, provider help other than ePREPmdh.providerenrollment@maryland.gov410-767-5340
Hospital presumptive eligibility info and
Claims, Institutional UB-04---410-767-5457
​LTSSMaryland, provider portal billing/policy
LTSSMaryland, technical assistance
Payment Adjustment help---410-767-5346


Claims Processing Division
P.O. Box 1935
Baltimore, MD 21203
Institutional Provider Relations EB-04
P.O. Box 22751
Baltimore, MD 21203
Professional Provider Relations CMS-1500
P.O. Box 22811
Baltimore, MD 21203
Medical Assistance Adjustment Unit
P.O. Box 13045
Baltimore, MD 21203