The code
| Code | Used for | Base units |
|---|---|---|
| 00142 | Lens surgery, including cataract | 4 |
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.
It's usually MAC
Most cataract cases are done under monitored anesthesia care. Add the QS modifier alongside your staffing modifier, for example QZ and QS for a CRNA working without medical direction. Our MAC billing guide explains how the modifiers fit together.
Where the money goes missing
- Time. Cases often run 15 to 25 minutes. Rounding start times or forgetting to record the end time can cost a unit per case. Over a full list, that adds up quickly.
- Medical necessity. Some commercial plans have tried to limit anesthesia for cataract surgery to patients with specific conditions. Read your payers' policies and make sure the record shows why MAC was needed when they ask for it.
- Diagnosis codes. Use the surgeon's diagnosis, and add the patient's relevant conditions when a payer's policy depends on them.
- Second eye. The second eye is a separate case on a separate date. Bill it on its own.
Bundled payment questions
Surgeons and centers sometimes ask whether anesthesia is "included" in the cataract fee. For Medicare, it isn't. Anesthesia is billed separately by whoever provides it.
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