No. Q9991 is a HCPCS Level II code, maintained by CMS, that identifies the drug supplied. CPT codes are five-digit numbers from the AMA that describe services. Giving the drug, for example an injection or infusion, is usually reported with a separate CPT administration code.

What NDCs are billed under Q9991?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 1 NDC under Q9991, for Sublocade. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for Q9991?

$2,060.132 per less than or equal to 100 mg, effective October 1, 2026 through December 31, 2026, from CMS's Part B drug payment limit file. Multiply by the units billed for the allowed amount before deductible and coinsurance. It is not a coverage decision.

Q9991 HCPCS Code: Sublocade

In short

Q9991 is the HCPCS Level II code for injection, buprenorphine extended-release (sublocade), less than or equal to 100 mg. CMS assigns NDCs for Sublocade to it. The Medicare Part B payment limit is $2,060.132 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeQ9991

Billing unitSee descriptor

Descriptor: Injection, buprenorphine extended-release (sublocade), less than or equal to 100 mg
Short descriptor: Buprenorph xr 100 mg or less
Code set: HCPCS Level II, maintained by CMS
Effective: Jul 1, 2018

Medicare Part B payment limit

CMS ASP file

Payment limit per unit$2,060.132

Perless than or equal to 100 mg

Coinsurance20%

Effective October 1, 2026 through December 31, 2026. Payment allowance limits subject to the ASP methodology are based on 2Q26 ASP data. A payment limit is not a coverage decision; the Medicare contractor decides coverage. CMS ASP pricing files

Units and claim line

Enter the dose to get the units and the NDC line for the CMS-1500 and the 837P.

HCPCS units

Modifier

NDC (11-digit)

NDC unit qualifier

NDC quantity

Enter the units to build the claim line.

NDCs billed under Q9991

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 1 NDC to Q9991 for Sublocade. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to Q9991 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Sublocade	12496-0100-01	Indivior Inc.	0.5	1

Q9991: common questions

Is Q9991 a CPT code?: No. Q9991 is a HCPCS Level II code, maintained by CMS, that identifies the drug supplied. CPT codes are five-digit numbers from the AMA that describe services. Giving the drug, for example an injection or infusion, is usually reported with a separate CPT administration code. CPT codes for drug administration.
What NDCs are billed under Q9991?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 1 NDC under Q9991, for Sublocade. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for Q9991?: $2,060.132 per less than or equal to 100 mg, effective October 1, 2026 through December 31, 2026, from CMS's Part B drug payment limit file. Multiply by the units billed for the allowed amount before deductible and coinsurance. It is not a coverage decision.

Q9991 — Injection, buprenorphine extended-release (sublocade), less than or equal to 100 mg