Every state. Every credential. One source of truth.

Common questions

Why do these rules differ so much by state?

Every state regulates clinical licensure independently. Renewal cycles, fees, CE/CME requirements, and controlled-substance registration rules are set by each state's own board of nursing, board of medicine, and pharmacy or controlled-substances regulator. Federal DEA registration is uniform; almost everything else is per-state.

Which states are part of the Nurse Licensure Compact?

Forty U.S. states have implemented the NLC, with Massachusetts having enacted but not yet implementing. Massachusetts's implementation date is to be determined. The Nurse Licensure Compact lets a nurse who lives in a compact state practice in any other compact state under one multistate license, subject to a 60-day rule when changing primary residence.

Which states are part of the Interstate Medical Licensure Compact?

As of 2026, the IMLC has 38 states plus DC and Guam serving as State of Principal License (SPL), two states (Hawaii and Vermont) issuing licenses as members but not as SPL, three states with the compact passed and implementation in process (Arkansas, New Mexico, Rhode Island), and two states with legislation introduced (Alaska, Massachusetts). Five states are non-members: California, New York, Oregon, South Carolina, and Virginia.

How often does Larch verify each state's rules?

Each state page carries a 'last reviewed' date. A drift-detection job re-checks each board's source page on a weekly cadence and flags pages where the source content has changed since our last review. We never claim a rule we can't cite, and we surface 'Confirm with [Board]' wherever we don't yet have a verified detail on file.