Billing J0585 ↗ for Botox (onabotulinumtoxinA) requires careful attention to Medicare's Medical Necessity rules to differentiate between covered medical procedures (like chronic migraines) and non-covered cosmetic use.
Botox Injection CPT Codes & HCPCS J0585 Billing Summary (2026)
When billing Botox (onabotulinumtoxinA) on a CMS-1500 claim, you must report both the anatomical chemodenervation procedure CPT code and the drug supply HCPCS code J0585 ↗ (Injection, onabotulinumtoxinA, 1 unit):
| Code | Code Type & Description | 2026 Box 24D / Unit & Modifier Rules |
|---|---|---|
| J0585 ↗ | HCPCS Drug Supply: Injection, onabotulinumtoxinA, 1 unit | Report administered units on line 1 + discarded single-use vial units on line 2 with Modifier JW (or Modifier JZ on a single line if 0 units discarded; 100 units = 1 vial). |
| 64615 ↗ | CPT Procedure: Chemodenervation of muscle(s); migraine / facial / cervical | Used for chronic migraine (ICD-10 G43.709 ↗ / G43.719 ↗); typically 155 units administered + 45 units JW wastage. |
| 64612 ↗ | CPT Procedure: Chemodenervation of muscle(s) innervated by facial nerve | Used for blepharospasm (G24.5 ↗) or hemifacial spasm (G51.31 ↗–G51.32 ↗). |
| 64642 / +64643 | CPT Procedure: Chemodenervation of one extremity (1–4 muscles / +5 or more) | Used for upper/lower limb spasticity; report 64644 ↗ / +64645 for additional extremities. |
Billing Units for Botox (J0585)
The HCPCS definition for J0585 ↗ is "Injection, onabotulinumtoxinA, 1 unit".
Botox is supplied in 100-unit or 200-unit single-use vials. You must bill the exact number of units administered to the patient.
| Drug | Code | Administered Dosage | Billing Units |
|---|---|---|---|
| Botox (onabotulinumtoxinA) | J0585 | 155 units | 155 |
Medical Necessity & ICD-10 Codes
To establish Medical Necessity, you must link J0585 to a covered diagnosis. Common Medicare-approved indications include:
- G43.709 ↗ - Chronic migraine without aura, not intractable, without status migrainosus
- G24.3 ↗ - Spasmodic torticollis (Cervical dystonia)
- N31.9 ↗ - Neuromuscular dysfunction of bladder, unspecified
Discarded Drug (JW Modifier)
Because Botox vials are single-use, any unused portion must be discarded and billed properly. If a 200-unit vial is opened but only 155 units are administered, you must bill:
- Line 1: J0585 (155 units)
- Line 2: J0585-JW (45 units)