HCPCS code Q9998 — Inj ustekinumab-aekn, 1 mg. Status: Active. Effective Jul 1, 2025. Source: CMS HCPCS Level II.

Q9998

Active

Inj ustekinumab-aekn, 1 mg

Injection, ustekinumab-aekn (selarsdi), biosimilar, 1 mg

Category: Temporary
Section: Q-codes: Temporary Codes
Effective: Jul 1, 2025
Code type: alphanumeric
OPPS Status: G — Pass-through drugs and biologicals
OPPS APC: 0859

MUE — Medically Unlikely Edits

Maximum units of Q9998 Medicare will pay for one beneficiary on one date of service. Claims exceeding the MUE are denied or returned for review.

Service Type Max Units / Day
DME Supplier 520
Outpatient Hospital 520
Practitioner Services 520

Source: CMS Medicare NCCI Medically Unlikely Edits

NDC Crosswalk

National Drug Codes (NDCs) mapped to this HCPCS code.

NDC Drug Name
51759-0505-32 Selarsdi
51759-0607-32 Selarsdi
51759-0708-13 Selarsdi
51759-0709-32 Ustekinumab-AEKN
51759-0710-32 Ustekinumab-AEKN

Change History

Quarterly changes published by CMS. Revisions may affect the code description, coverage, or rate — review each quarter's changes before submitting claims.

  • New Code 2025-Q3
    Inj ustekinumab-aekn, 1 mg
  • Revised 2025-Q3
    Ustekinumab-aekn inj
    Inj ustekinumab-aekn, 1 mg