PASATRU
garetosmab-grts · Regeneron Pharmaceuticals
Drug & Product Overview
How to Bill PASATRU Now
Until CMS assigns PASATRU its own code, bill it with J3590, the code for unclassified biologics, and identify the product by its NDC. Once a permanent code takes effect, J3590 claims for PASATRU will be denied.
| Setting | Claim Form | Billing Code | Notes |
|---|---|---|---|
| Physician office / Part B | CMS-1500 / 837P | J3590 | Enter the drug name, dose and NDC in Item 19 (or the 837P equivalent). The MAC prices the claim manually. |
| Hospital outpatient (OPPS) | UB-04 / 837I | C9399 | Unclassified drug or biological. Separately payable and priced manually by the MAC. |
About PASATRU
PASATRU (garetosmab-grts) is an intravenous infusion from Regeneron Pharmaceuticals used to reduce formation of new heterotopic ossification (HO) lesions and clinician-assessed flare-ups in adults with fibrodysplasia ossificans progressiva (FOP). It was approved by the FDA on August 19, 2026.
PASATRU Pricing & NDCs
Package WAC and AWP for each NDC, updated monthly. There's no ASP payment limit until a permanent code takes effect.
| NDC Code | Package | WAC | AWP |
|---|---|---|---|
| •••••-••••-•• | ••• MG single-dose vial | $•••.•• | $•••.•• |
1 NDC on file. Subscribe to see its package, WAC and AWP, with monthly history.
HCPCS Code Status
As of Nov 5, 2026CMS publishes new drug codes each quarter. This page shows the code and its effective date once it does.
A miscellaneous code is valid only until a drug’s own code takes effect. Confirm coding with your payer before billing.
PASATRU Clinical Information
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Frequently Asked Questions
What HCPCS code is used for PASATRU?
J3590 (unclassified biologics) in the physician office, and C9399 in the hospital outpatient setting, until CMS assigns a permanent code.
What NDC goes on a PASATRU claim?
The NDC of the package you administered. Subscribers can see PASATRU’s NDCs with package, WAC and AWP.
When will PASATRU get a permanent J-code?
CMS has not published one yet. CMS publishes permanent codes in its quarterly coding decisions; this page will show the code and effective date once they are out.