MS‑DRG 166: Other Respiratory System O.R. Procedures with MCC

What Medicare paid hospitals for MS‑DRG 166 in 2024: nationally, state by state and across hospitals.

Paid per case$36,2562.4× the all-DRG average

Discharges2,9370.06% of all Medicare discharges

Total paid$106.5M124th largest MS‑DRG by spending

Hospitals164in 38 states and DC

Charges ÷ paid5.7×$207,106 average charge

Relative weight3.8736FY2027, 7.6-day geometric mean stay; FY2026 3.7377 (+3.6%)

In 2024 Medicare paid hospitals an average of $36,256 per discharge for MS‑DRG 166, across 2,937 fee-for-service discharges at 164 hospitals: 0.06% of all Medicare inpatient discharges and $106.5M in total, the 124th largest MS‑DRG by Medicare spending.

By state, the average ran from $19,345 in Louisiana to $63,604 in California. Across hospitals, half were paid between $26,312 and $38,230 per case, and the median hospital $31,374; the payment moves with each hospital’s wage index, teaching and low-income share, and with outlier cases.

Hospitals charged $207,106 on average for these stays, 5.7 times what Medicare paid: charges are list prices, while Medicare pays a fixed amount per MS‑DRG.

See MS‑DRG 166 on the interactive map Price an MS‑DRG 166 claim at any hospital Every MS‑DRG

What changed in FY2027

The rates for discharges from October 1, 2026 (MS‑DRG version 44) against FY2026.

MS‑DRG 166, FY2026 and FY2027
	FY2026	FY2027	Change
Relative weight	3.7377	3.8736	+3.6%
Geometric mean stay (days)	7.6	7.6	0.0
Average stay (days)	10.5	10.5	0.0

Not capped: the +3.6% is CMS’s yearly recalibration of every weight from recent claims and cost data.
Name, MDC and transfer status are unchanged.

FY2027 national base payment (illustration)

$28,617.96

The FY2027 weight times the operating standardized amount and the capital rate ($6,848.00 + $539.95) at a wage index of 1.0. No IME, DSH, outlier or other hospital-specific adjustment, so it is not what any hospital is paid; price it at a hospital for that.

FY2027 national base payment across the severity levels of MS‑DRG 166
MS‑DRG	Severity	Payment ($)	Step ($)
166	with MCC	28,617.96	—
167	with CC	13,478.58	−15,139.38
168	without CC/MCC	10,266.30	−18,351.66

FY2027 inpatient rates: what else changed on October 1 · Price MS‑DRG 166 at a hospital

Paid per case, by state

MS‑DRG 166 by state, 2024
State	Paid per case	Discharges	Hospitals	Charges ÷ paid
California	$63,604	303	13	7.7×
Maryland*	$46,173	16	1	1.4×
Wisconsin	$45,611	64	2	4.9×
New York	$45,407	270	13	6.5×
Minnesota	$44,589	27	1	3.2×
New Jersey	$38,330	84	5	5.8×
Connecticut	$38,163	32	2	3.0×
Massachusetts	$38,123	121	7	2.9×
Arizona	$34,677	68	4	4.5×
Pennsylvania	$34,484	157	10	7.2×
Washington	$34,387	16	1	3.6×
Missouri	$34,225	59	4	4.1×
Illinois	$34,035	132	7	4.4×
Delaware	$34,025	41	1	3.8×
Ohio	$33,977	108	6	5.2×
District of Columbia	$33,842	26	2	6.5×
Colorado	$31,589	16	1	6.9×
North Carolina	$31,505	111	6	4.1×
Kansas	$30,340	40	3	6.3×
Texas	$30,029	243	11	6.8×
Michigan	$30,014	81	6	3.4×
Oklahoma	$29,902	48	3	7.0×
Georgia	$29,792	38	3	5.3×
West Virginia	$29,525	32	2	4.8×
Utah	$29,424	32	2	3.0×
South Carolina	$29,097	42	3	3.7×
Florida	$28,619	225	14	6.5×
Nevada	$28,527	17	1	11.0×
Indiana	$28,350	66	5	4.5×
Nebraska	$28,205	27	2	2.9×
Hawaii	$27,500	15	1	4.5×
Kentucky	$26,913	96	5	4.3×
Iowa	$26,692	12	1	4.5×
Alabama	$26,309	14	1	4.0×
Virginia	$25,610	49	3	6.3×
Tennessee	$25,302	101	5	5.0×
Arkansas	$25,136	44	4	3.6×
Mississippi	$24,102	51	2	4.1×
Louisiana	$19,345	13	1	3.8×
United States	$36,256	2,937	164	5.7×

* Maryland hospitals are paid under the state’s all-payer model, not the IPPS, so Maryland is left out of the state range above.

How much hospitals vary

Each hospital’s own average Medicare payment for MS‑DRG 166.

10th percentile	$23,707
25th percentile	$26,312
Median hospital	$31,374
75th percentile	$38,230
90th percentile	$45,603

Related analysis

Transfers and the per-diem rule: when a short stay pays less than the full DRG · Inpatient DRG
DRG validation and the single-MCC claim: when one code moves the payment · Payment integrity

Nearby MS‑DRG numbers

Questions

What did Medicare pay for MS‑DRG 166 in 2024?

An average of $36,256 per discharge across 2,937 fee-for-service discharges at 164 hospitals, $106.5M in total.

Which state paid the most for MS‑DRG 166?

California, at $63,604 per case; Louisiana paid the least, $19,345.

Where do these figures come from?

From the Medicare Inpatient Hospitals - by Provider and Service (data year 2024): the published hospital-by-DRG averages of Medicare fee-for-service inpatient discharges in 2024. Cells with fewer than 11 discharges are not published, so a hospital with a handful of cases is not counted. Average Medicare payment excludes the patient’s deductible and coinsurance.