A4366 HCPCS Level II Code: Ostomy vent, any type, each
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: Ostomy vent
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
The comparisons, hierarchy, index entries, guidelines, relationships, risk-adjustment and coverage context a coder commonly needs. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.
Contextual Map
Every relationship of A4366 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)
- A4338 — Indwelling catheter; foley type, two-way latex with coating (teflon, silicone, silicone elastomer, or hydrophilic, etc.), each[Sibling]— CMS HCPCS Level II code set
- A4340 — Indwelling catheter; specialty type, (e.g., coude, mushroom, wing, etc.), each[Sibling]— CMS HCPCS Level II code set
- A4341 — Indwelling intraurethral drainage device with valve, patient inserted, replacement only, each[Sibling]— CMS HCPCS Level II code set
- A4342 — Accessories for patient inserted indwelling intraurethral drainage device with valve, replacement only, each[Sibling]— CMS HCPCS Level II code set
- A4344 — Indwelling catheter, foley type, two-way, all silicone or polyurethane, each[Sibling]— CMS HCPCS Level II code set
- A4346 — Indwelling catheter; foley type, three way for continuous irrigation, each[Sibling]— CMS HCPCS Level II code set
- A4349 — Male external catheter, with or without adhesive, disposable, each[Sibling]— CMS HCPCS Level II code set
- A4351 — Intermittent urinary catheter; straight tip, with or without coating (teflon, silicone, or silicone elastomer, etc.), each[Sibling]— CMS HCPCS Level II code set
- and 32 more
Change history
- January 1, 2004 — Added to the code set [Change history]— CMS release files (code change ledger)
Deep reference
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. "A4366 — Ostomy vent, any type, each." HCPCS Level II October 2026. https://medcoder.ai/hcpcs/code/a4366-ostomy-vent-any-type-each
Change history
- January 1, 2004Added to the code setOstomy vent, any type, eachHCPCS 2004 changes
Nearest Codes in This Family
Official HCPCS Level II classifications closest to A4366 in its code family, with their registry titles.
- A4360 — Disposable external urethral clamp or compression device, with pad and/or pouch, each
- A4361 — Ostomy faceplate, each
- A4362 — Skin barrier; solid, 4 x 4 or equivalent; each
- A4363 — Ostomy clamp, any type, replacement only, each
- A4364 — Adhesive, liquid or equal, any type, per oz
- A4367 — Ostomy belt, each
- A4368 — Ostomy filter, any type, each
- A4369 — Ostomy skin barrier, liquid (spray, brush, etc.), per oz
- A4371 — Ostomy skin barrier, powder, per oz
- A4372 — Ostomy skin barrier, solid 4 x 4 or equivalent, standard wear, with built-in convexity, each