Zip Code + 4 Reminder
Date: 08/20/25
MHS would like to remind all providers billing with a National Provider Identifier (NPI) that all claims require the zip code + 4 format for the billing provider addresses. This information is necessary to ensure a one-to-one match for provider identification.
In cases where a one-to-one match cannot be established using the zip code + 4, please ensure you include the taxonomy code that was submitted during your Indiana Health Coverage Programs (IHCP) enrollment. Including the full zip code + 4 and the taxonomy code, when applicable, ensures proper identification of the claims. If MHS cannot make a one-to-one match to identify the specific NPI ID associated with a claim, the claim will be rejected or denied.
Billing provider NPI Data Fields:
- Professional Billing — box 33a
- Professional Rendering — box 24J
- Institutional Billing — box 56
- Institutional Attending — box 76
Billing provider taxonomy code Data Fields:
- Professional Billing — box 33b
- Professional Rendering – box 24
- Institutional Billing — box 81CC a
- Institutional Attending — box 81CC b
Billing provider service location ZIP Code + 4 Data Fields:
- Professional Billing — box 33
- Institutional Billing — box 1
Thank you for your attention to this matter and for your continued partnership.
As always thank you for being our partner in care. If you have questions or need assistance, please contact the MHS Contact Center at 1-877-647-4848 (TTY: 1-800-743-3333), available Monday through Friday, from 8 a.m. to 8 p.m. EST.