M1478 HCPCS Level II Code: Psychoactive substance abuse
HCPCS Level II code, maintained by CMS. Not a CPT code: CPT (HCPCS Level I) is a separate AMA code set that MedCoder does not publish. About HCPCS Level II
Compare with another codeCheck this code on a claim
Medicare Coverage & Payment
- CMS short descriptor: Psychoactive sub abuse
Source: CMS HCPCS Level II release. Coverage codes indicate how Medicare treats the code, not whether a specific claim will be paid; payer policy and documentation still govern.
Coding context
Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.
Contextual Map
Every relationship of M1478 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.
Nearest codes (40)
- M1458 — Patient died prior to the end of the performance period[Sibling]— CMS HCPCS Level II code set
- M1459 — Patient was in hospice or receiving palliative care services at any time during the performance period[Sibling]— CMS HCPCS Level II code set
- M1460 — Diagnosis for chronic obstructive pulmonary disease, emphysema, cystic fibrosis, or acute respiratory failure[Sibling]— CMS HCPCS Level II code set
- M1461 — Patient diagnosis for chronic hepatitis c[Sibling]— CMS HCPCS Level II code set
- M1462 — Patients with clinical indications for imaging of the head[Sibling]— CMS HCPCS Level II code set
- M1463 — Documentation of at least two attempts to follow up with patient within 180 days of treatment[Sibling]— CMS HCPCS Level II code set
- M1464 — No documentation of at least two attempts to follow up with patient within 180 days of treatment[Sibling]— CMS HCPCS Level II code set
- M1465 — Patient follow up more than 180 days after treatment[Sibling]— CMS HCPCS Level II code set
- and 32 more
Change history
- January 1, 2026 — Added to the code set [Change history]— CMS release files (code change ledger)
Reference
Index terms and tables, published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.
Sources for this page
Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.
- Code, descriptors, coverage and pricing attributes Official source data
- CMS HCPCS Alpha-Numeric (ANWEB) release — October 2026 quarterly update Release, file and checksum · Publisher’s page
- Change history and date-of-service validity Official source data
- CMS HCPCS quarterly update files, ingested into the change ledger Release, file and checksum · Publisher’s page
- Comparisons, relationships and the contextual map MedCoder-derived relationship
- Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
- Summary and FAQ answers MedCoder editorial explanation
- Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.
Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 20, 2026 · All releases and sources
Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules
Cite this page
Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.
MedCoder.ai. "M1478 — Psychoactive substance abuse." HCPCS Level II October 2026. https://medcoder.ai/hcpcs/code/m1478-psychoactive-substance-abuse
Change history
- January 1, 2026Added to the code setPsychoactive substance abuseHCPCS 2026 changes
Nearest Codes in This Family
Official HCPCS Level II classifications closest to M1478 in its code family, with their registry titles.
- M1473 — Patient situations, at any point during the denominator identification period, where the patient's functional capacity or motivation (or lack thereof) to improve may impact the accuracy of results of…
- M1474 — Patients with diagnosis of dementia
- M1475 — Patients with diagnosis of huntington's disease
- M1476 — Patients with diagnosis of cognitive impairment or alzheimer's disease
- M1477 — Diagnosis of delirium
- M1479 — Patients whose functional capacity or motivation (or lack thereof) to improve may impact the accuracy of results of validated tools such as delirium, dementia, intellectual disabilities, and…
- M1480 — Patients whose functional capacity or motivation (or lack thereof) to improve may impact the accuracy of results of validated tools such as delirium, dementia, intellectual disabilities, and…
- M1481 — Patients receiving hospice or palliative care or who died during the measurement period
- M1482 — Positive/detectable hepatitis c virus quantitative or qualitative rna test result during the denominator identification period
- M1483 — Patients who achieve sustained virological response as identified by an hcv rna test (cpt 87522) or (cpt 87521) with a negative/undetectable hcv rna result that occurred 20 weeks to 12 months after…