M1478Medical Services

Psychoactive substance abuse

Short description: Psychoactive sub abuse

Effective date: January 1, 2026
Termination date: —

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Frequently asked questions

What is HCPCS code M1478?

M1478 is a HCPCS Level II code for Psychoactive substance abuse.

What category is HCPCS code M1478 in?

M1478 falls under the Medical Services category of HCPCS Level II.

When did HCPCS code M1478 become effective?

M1478 has been effective since January 1, 2026, per CMS's quarterly HCPCS update.

HCPCS Level II data from CMS (public domain). HCPCS Level I (CPT) codes are not included — CPT is copyrighted by the American Medical Association. Always verify codes with authoritative sources before making coding or billing decisions.