C9311: Injection, eplontersen, 1 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered)
C9311 is a HCPCS Level II code for injection, eplontersen, 1 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered). It belongs to the Outpatient Prospective Payment System section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Special coverage instructions apply
There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q4-Oct. This states Medicare’s position on the code, not on your particular claim.
The CMS record for C9311
- Long descriptor
- Injection, eplontersen, 1 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered)
- Short descriptor
- Inj, eplontersen, 1 mg
- Added
- October 1, 2026
- BETOS
- O1E
- Pricing indicator
- 53: Other
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service: CMS's own analytic grouping.
Statute.
Codes adjacent to C9311
HCPCS has no hierarchy: related items simply sit next to each other in the numbering. If C9311 is not quite right, the correct code is very often within a few positions of it.
- C9303Injection, zolbetuximab-clzb, 1 mgterminated
- C9304Injection, marstacimab-hncq, 0.5 mgterminated
- C9305Injection, nipocalimab-aahu, 3 mgterminated
- C9306Injection, telisotuzumab vedotin-tllv, 1 mgterminated
- C9307Injection, linvoseltamab-gcpt, 1 mgterminated
- C9308Injection, carboplatin (avyxa), 1 mgterminated
- C9309Injection, onasemnogene abeparvovec-brve, per treatmentterminated
- C9310Injection, leucovorin calcium (avyxa), 1 mgterminated
- C9312Injection, trabectedin (apotex), not therapeutically equivalent to j9362, 0.01 mg
- C9313Injection, pivekimab sunirine-pvzy, 0.01 mg
- C9349Puraply, and puraply antimicrobial, any type, per square centimeterterminated
- C9352Microporous collagen implantable tube (neuragen nerve guide), per centimeter length
- C9353Microporous collagen implantable slit tube (neurawrap nerve protector), per centimeter length
- C9354Acellular pericardial tissue matrix of non-human origin (veritas), per square centimeter
- C9355Collagen nerve cuff (neuromatrix), per 0.5 centimeter length
- C9356Tendon, porous matrix of cross-linked collagen and glycosaminoglycan matrix (tenoglide tendon protector sheet), per square centimeter