Anesthesia for Electroconvulsive Therapy
CPT 00104
Reported when an anesthesia professional puts a patient briefly under general anesthesia for an electroconvulsive therapy session.
No national payment amount
Anesthesia code: paid via base + time units × a separate anesthesia conversion factor, not the standard PFS RVU formula. Supply a locality (and time_minutes for a specific amount) to compute it.
~$177.76 for a 60-minute example case in Dallas, TX
Where this example comes from
(base_units + time_units) × anesthesia_cf time_units = time_minutes / 15. The anesthesia conversion factor is CMS's published locality-adjusted value.
Source
Anesthesia has no single national rate — payment is (base units + time units) × the locality's anesthesia conversion factor, so the amount above is an example computed with Dallas, TX rates, before sequestration. Enter your ZIP and your own case length for your locality's number.
Base units 4 — set by CMS for this code and the same in every locality. One time unit is 15 minutes, so a 60-minute case adds 4 time units.
How much does Medicare pay for CPT 00104? Copy link
CPT 00104 is an anesthesia code, so Medicare has no single national rate: payment is (base units + time units) × the locality's anesthesia conversion factor — for example, about $177.76 for a 60-minute case in Dallas, TX under the Q1 2019 release, before sequestration.
Source: Physician relative value file (Q1 2019) · effective January 2019 · materially updated Aug 4, 2026 · compact facts
Can you bill it with another code? Copy link
Enter a second CPT or HCPCS code billed the same date of service to check the current NCCI procedure-to-procedure edit between it and 00104.
How often 00104 is billed Copy link
Across Original Medicare in CY2024, 00104 ranked #1,157 of the 7,879 CPT codes billed to Medicare that year, ranked by patients served or total allowed dollars. Patients who received it in 2024 were billed for it an average of 17.0 times that year — more than once per patient.
2024 Medicare fee-for-service only, national totals — Medicare Advantage, Medicaid and commercial volume are excluded, so real-world use runs higher. This is a calendar-year snapshot from the CMS Physician & Other Practitioners dataset, on a different cycle from the Q1 2019 fee schedule the rates above come from.
Common questions Copy link
Why is there no payment amount for 00104?
Its status indicator is J (anesthesia). Medicare prices this under the anesthesia formula — (base units + time units) × the locality anesthesia conversion factor — not the standard RVU formula. Ask for a locality to see that factor. The blank is deliberate: the amount is either unknown or paid under another provision, so reading it as $0 would be wrong.
When does this rate change?
CMS publishes a fee schedule release every quarter (January, April, July, October), and each is versioned here. See what changed each release, or get an email when a new release moves rates.
Sources: CMS Medicare Physician Fee Schedule Relative Value Files.
Saw this code on your bill? Copy link
For patientsWhat does CPT code 00104 mean?
CPT code 00104: Anesthesia for Electroconvulsive Therapy. A common example is a patient with depression that has not responded to medication, coming in for a short ECT session. An anesthesia clinician gives a fast-acting sleep medication and a muscle relaxant, supports breathing with a mask for a few minutes while the treatment is delivered, and the patient wakes up shortly after - often as part of a series of such sessions over several weeks.
Did this answer your question about CPT 00104?
We're building this out in the open. Tell us what you were actually trying to work out and we'll either answer you directly or build the page that does.
Source & method
Show sources
Hide
This is computed from CMS's Medicare Physician Fee Schedule Q1 2019 release (schedule pfs, effective January 2019). National amounts apply a GPCI of 1.000 and leave sequestration off. The status indicator decides payability, never the RVU values, so a blank RVU stays blank. Releases are immutable: a rate retrieved for a past quarter always reflects that release. Commercial and cash-pay figures anywhere on this page are arithmetic on the Medicare amount, using commonly cited reimbursement ranges. They're illustrative, and no nationwide claims database stands behind them. Our methodology covers all of this in depth — sourcing, parsing, versioning, and how claims are cross-checked before they ship.
Description written from primary sources: CMS Medicare Physician Fee Schedule Relative Value Files. Not derived from AMA CPT descriptor text.
Use the (i) buttons next to each amount above for the exact row, columns, and math.
Cite this rate
This link keeps pointing at the Q1 2019 figures, even after a newer release lands.
CPT 00104 Medicare Physician Fee Schedule rate (Q1 2019). Localis. https://localishealth.com/cpt/00104/2019/A