Anesthesia Units (Base + Time + Modifying x CF)

Anesthesia payment: (base + time + modifying) units x conversion factor, then the medical-direction percentage (AA personally-performed, QK/QY/QX directed).

Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.

Example

Base units: 5
Anesthesia time in minutes: 60
Modifying units: 1
Anesthesia conversion factor: 22
Medical direction: QK -- medical direction of 2-4 concurrent (50%)

Result: (5 base + 4 time + 1 modifying) = 10 units x $22 = $220; medically directed (QK 50%) = $110.

The tool opens with these values already filled in. Replace them with your own.

What you enter

Base units (ASA base for the procedure)
Anesthesia time in minutes
Modifying units (physical status / qualifying circumstances)
Anesthesia conversion factor ($ per unit)
Medical direction: aa, qz (100%), qy, qk, qx (50%), ad (flat 3 base units)

How this is calculated

CMS Pub. 100-04 Ch. 12 50: anesthesia payment = (base + time + modifying units) x the anesthesia CF; time unit = 15 min. ASA RVG base units are entered, not shipped. Medical-direction modifiers AA/QZ pay 100%, QK/QY/QX 50%, AD a flat 3 base units. Read the source ↗

A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.