S0166 HCPCS Level II code: Injection, olanzapine, 2.5 mg
CMS terminated S0166: its last date of service was Sep 30, 2023. It stays here for looking up older claims; newer services need a current code.
Official description
S0166Injection, olanzapine, 2.5 mg
Short description: Inj olanzapine 2.5mg
HCPCS · United States
Medicare details
The indicators CMS publishes with S0166 in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Not payable by Medicare
- Medicare pricing
- Service not separately priced by Part B (e.g., services not covered, bundled, used by Part A only, etc.)
- Type of service
- Other medical items or services
- BETOS category
- Undefined codes
- Added
- Oct 1, 2004
- Terminated after
- Sep 30, 2023
Where S0166 sits
- 1S codesTemporary national codes (non-Medicare)
- 2Terminated S0166Injection, olanzapine, 2.5 mg
Source and release
- Data release
- HCPCS Level II · October 2026
- Effective date
- Oct 1, 2026
- Publisher
- CMS
This page is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes: Centers for Medicare & Medicaid Services’s October 2026 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
Is HCPCS code S0166 still valid?
No. CMS terminated S0166; its last date of service was Sep 30, 2023. It is listed for looking up services from before then. Use a current code for newer services.
Does Medicare cover S0166?
CMS lists S0166’s Medicare coverage as “Not payable by Medicare” and its pricing as “Service not separately priced by Part B (e.g., services not covered, bundled, used by Part A only, etc.)”. Coverage and payment still depend on the patient, the setting, the documentation and the payer.
Which HCPCS Level II release does this page use?
It uses CMS’s October 2026 release, in effect from Oct 1, 2026 to Dec 31, 2026. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside S0166
All S codesS0148Injection, pegylated interferon alfa-2b, 10 mcgS0155Sterile dilutant for epoprostenol, 50 mlS0156Exemestane, 25 mgS0157Becaplermin gel 0.01%, 0.5 gmS0160Dextroamphetamine sulfate, 5 mgS0164Injection, pantoprazole sodium, 40 mgS0169Calcitrol, oral, 0.25 microgramS0170Anastrozole, oral, 1 mgS0171Injection, bumetanide, 0.5 mgS0172Chlorambucil, oral, 2 mgS0174Dolasetron mesylate, oral 50 mg (for circumstances falling under the medicare statute, use q0180)S0175Flutamide, oral, 125 mg