In short

J0599 is the HCPCS Level II code for injection, c-1 esterase inhibitor (human), (haegarda), 10 units. One billing unit is 10 units.

Code

CMS HCPCS file
HCPCS codeJ0599
Billing unit10 units
Descriptor
Injection, c-1 esterase inhibitor (human), (haegarda), 10 units
Short descriptor
Inj., haegarda 10 units
Code set
HCPCS Level II, maintained by CMS
Effective
Jan 1, 2022

The billing unit is read from the descriptor. Confirm it against the CMS file before billing.

Units and claim line

Units = dose given ÷ 10 units. For example, 1000 units is 100 units. Enter the dose to get the units and the NDC line for the CMS-1500 and the 837P.

Enter the dose given to build the claim line.

Find the NDC

Med-Code hasn’t mapped J0599 to specific products yet. Search the FDA NDC Directory for the drug named in the descriptor, and check the route and strength match the code.

Search NDCs for c-1 esterase inhibitor

J0599: common questions

Is J0599 a CPT code?
No. J0599 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 is one billing unit of J0599?
One unit of J0599 is 10 units, as stated in the code's descriptor. Units to report = dose given ÷ 10 units. J-code billing units.

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