CPT 94400

Carbon dioxide breathing response test

Hospitals report these codes with terse, inconsistent chargemaster text. This plain-English title was written by an AI model from that text and has not been reviewed by a person, so it can be wrong. The prices on this page come straight from hospital filings and do not depend on it.

Model: claude-haiku-5-5
Provider: anthropic
API: message_batches
Reasoning effort: low
Max output tokens: 4096
Prompt version (hash): 444523875572
Generated: October 20, 2026

Original text from hospital filings

CO2 breathing response curve

Payer pricing summary

Low

Average

$62

Median

$58

High

$149

Payer rate distribution

Filter by billing methodology

All methodologies Case rate 14 Fee schedule 24 Per diem 5 Percent of billed charges 15 Other 4

Filter by billing class

#
1	Molina facility · case rate · outpatient · +2 other terms	27	$56	$58	$15	25%	—	$41 – $100
2	UnitedHealthcare facility · case rate · outpatient · +1 other terms	19	$58	$62	$19	31%	—	$31 – $102
3	Anthem facility · case rate · outpatient · +1 other terms	15	$59	$64	$15	23%	—	$40 – $100
4	Caresource facility · case rate · outpatient	15	$60	$64	$15	23%	—	$40 – $102
5	Optum facility · case rate · outpatient	13	$53	$58	$15	26%	—	$39 – $90
6	Humana facility · case rate · outpatient	8	$41	$42	$2	5%	—	$41 – $45
7	Aetna Better Health facility · case rate · outpatient	7	$49	$48	$2	3%	—	$43 – $49
8	Amerihealth Caritas facility · case rate · outpatient · +1 other terms	7	$45	$46	$1	3%	—	$45 – $49
9	Aetna facility · case rate · outpatient · +1 other terms	6	$47	$51	$14	28%	—	$35 – $83
10	Blue Cross Blue Shield facility · case rate · outpatient · +1 other terms	4	$153	$150	$48	32%	—	$98 – $221

Page 1 of 2 · 14 payers

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