The code
| Code | Used for | Base units |
|---|---|---|
| 01402 | Total knee arthroplasty | 7 |
Base units shown are the standard values most payers use. Check your payer and the current year's CMS base unit file before relying on them.
The nerve block
An adductor canal or femoral block for pain after surgery can often be billed on its own, with its own procedure code. Two conditions usually apply:
- The block is for post-op pain, and the surgeon asked for it. Note the request in the record.
- The block isn't the main anesthetic for the surgery. If the block is the anesthetic, it's covered by the anesthesia code.
If you placed the block before the anesthetic started, take that time out of your anesthesia time. You can't bill the same minutes twice. More in our nerve block billing guide.
Spinal or general
The anesthesia code is the same whether you use a spinal or a general anesthetic. Record which one you used, and when anesthesia time started and stopped.
Bilateral knees
When both knees are done in one session, bill one anesthesia code with the total time. Don't use a bilateral modifier on the anesthesia claim.
This article is general information, not billing, legal or tax advice. Payer rules change; always check current guidance.
Sources
- CMS: Medicare Claims Processing Manual, Chapter 12 (Anesthesia)
- Maryland Workers' Compensation Commission: anesthesia base unit values