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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.

~$180.71 for a 60-minute example case in Dallas, TX

Source

Where this example comes from

(base_units + time_units) × anesthesia_cf × locality_adjuster

base_units
4
time_units
4
anesthesia_cf
22.59
locality_adjuster
0.9999
amount
$180.71

time_units = time_minutes / 15.

locality_adjuster = 0.787 × work_gpci + 0.147 × pe_gpci + 0.066 × mp_gpci.

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 for your own locality's number.

How much does Medicare pay for CPT 00104?

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 $180.71 for a 60-minute case in Dallas, TX under the Q3 2014 release, before sequestration.

Source: Physician relative value file (Q3 2014) · effective July 2014 · materially updated Aug 4, 2026 · compact facts

How often 00104 is billed

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.

Beneficiaries
6,667
Office + facility patients combined
Services
113,473
Times it was billed
Allowed
$9.1M
Total Medicare allowed dollars
Compare: ↑ #1,155 more popular · 87184 ↓ #1,158 less popular · 87329

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 Q3 2014 fee schedule the rates above come from.

Common questions

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?

What is a 00104 visit in patient-friendly terms?

In plain terms: Anesthesia care during electroconvulsive therapy (ECT), a treatment for severe depression and certain other psychiatric conditions in which a brief electrical stimulus is delivered to the brain under general anesthesia to produce a controlled seizure. The anesthesia is brief but requires a rapid-acting general anesthetic plus a muscle relaxant so the seizure does not cause a visible convulsion or injury, along with airway support for the few minutes the patient is unconscious. Think of 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. You'll typically see CPT 00104 on a bill or explanation of benefits (EOB) when a clinician performs or bills for this service.

Computation & policy

How this amount is computed

amount = (work RVU × work GPCI + PE RVU × PE GPCI + MP RVU × MP GPCI) × conversion factor. National amounts use GPCI = 1.000. To price an RVU figure of your own, use the RVU-to-dollars converter.

Release Q3 2014
Component RVU
Work RVU blank
Practice expense RVU (non-facility) blank
Practice expense RVU (facility) blank
Malpractice RVU blank

Every rate combines three parts: work (the clinician’s time, skill and effort), practice expense (office overhead — higher when the service is done in a doctor’s own office), and malpractice (the share of liability-insurance cost). A blank means CMS publishes no national number for that part. Read it as unknown, and never as zero.

History & related

Rate history by release

National non-facility amount for 00104 across quarterly releases.

Release Status Non-facility Facility
Q3 2026 Jun 30, 2026 – present J — —
Q2 2026 Mar 10, 2026 – Jun 29, 2026 J — —
Q1 2026 Dec 29, 2025 – Mar 9, 2026 J — —

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Source & method

Show sources

This is computed from CMS's Medicare Physician Fee Schedule Q3 2014 release (schedule pfs, effective July 2014). 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.

Physician relative value file (Q3 2014) · rvu14c.zip (PPRRVU14_V0515.csv row 4,101)

Conversion factor $35.8228 read from the same file, row 11, column 25.

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 Q3 2014 figures, even after a newer release lands.

CPT 00104 Medicare Physician Fee Schedule rate (Q3 2014). Localis. https://localishealth.com/cpt/00104/2014/C