FIPS Code	County Name	State	Original CBSA	Original CBSA Name	2025 Transition CBSA	2025 Transition CBSA Name	Revised CBSA	Revised CBSA Name	
01129	WASHINGTON	AL	33660	"Mobile, AL"	50001	"Washington County, AL"	01	ALABAMA	
05047	FRANKLIN	AR	22900	"Fort Smith, AR-OK"	50015	"Franklin County, AR"	04	ARKANSAS	
09150	NORTHEASTERN CONNECTICUT 	CT	49340	"Worcester, MA-CT"	50030	"Northeastern CT, CT"	07	CONNECTICUT	
13171	LAMAR	GA	12060	"Atlanta-Sandy Springs-Alpharetta, GA"	50002	"Lamar County, GA"	11	GEORGIA	
15005	KALAWAO	HI	12	HAWAII	50003	"Kalwao County, HI"	27980	"Kahului-Wailuku, HI"	
16077	POWER	ID	38540	"Pocatello, ID"	50004	"Power County, ID"	13	IDAHO	
17183	VERMILION	IL	19180	"Danville, IL"	50005	"Vermilion County, IL"	14	ILLINOIS	
18133	PUTNAM	IN	26900	"Indianapolis-Carmel-Anderson, IN"	50006	"Putnam County, IN"	15	INDIANA	
21101	HENDERSON	KY	21780	"Evansville, IN-KY"	50007	"Henderson County, KY"	18	KENTUCKY	
22045	IBERIA	LA	29180	"Lafayette, LA"	50010	"Iberia County, LA"	19	LOUISIANA	
24009	CALVERT	MD	47894	"Washington-Arlington-Alexandria, DC-VA-MD-WV"	50008	"Calvert County, MD"	30500	"Lexington Park, MD"	
24047	WORCESTER	MD	41540	"Salisbury, MD-DE"	50009	"Worcester County, MD"	21	MARYLAND	
26155	SHIAWASSEE	MI	29620	"Lansing-East Lansing, MI"	50011	"Shiawassee County, MI"	23	MICHIGAN	
27075	LAKE	MN	20260	"Duluth, MN-WI"	50012	"Lake County, MN"	24	MINNESOTA	
27133	ROCK	MN	24	MINNESOTA	50013	"Rock County, MN"	43620	"Sioux Falls, SD-MN"	
32019	LYON	NV	29	NEVADA	50014	"Lyon County, NV"	39900	"Reno, NV"	
36123	YATES	NY	40380	"Rochester, NY"	50016	"Yates County, NY"	33	NEW YORK	
37077	GRANVILLE	NC	20500	"Durham-Chapel Hill, NC"	50017	"Granville County, NC"	34	NORTH CAROLINA	
37087	HAYWOOD	NC	11700	"Asheville, NC"	50018	"Haywood County, NC"	34	NORTH CAROLINA	
39123	OTTAWA	OH	45780	"Toledo, OH"	50019	"Ottawa County, OH"	41780	"Sandusky, OH"	
42103	PIKE	PA	35084	"Newark, NJ-PA"	50020	"Pike County, PA"	39	PENNSYLVANIA	
51113	MADISON	VA	47894	"Washington-Arlington-Alexandria, DC-VA-MD-WV"	50021	"Madison County, VA"	49	VIRGINIA	
51175	SOUTHAMPTON	VA	47260	"Virginia Beach-Norfolk-Newport News, VA-NC"	50022	"Rural Virginia Beach, VA"	49	VIRGINIA	
51620	FRANKLIN CITY	VA	47260	"Virginia Beach-Norfolk-Newport News, VA-NC"	50022	"Rural Virginia Beach, VA"	49	VIRGINIA	
54035	JACKSON	WV	16620	"Charleston, WV"	50024	"Rural Charleston, WV"	51	WEST VIRGINIA	
54043	LINCOLN	WV	16620	"Charleston, WV"	50024	"Rural Charleston, WV"	51	WEST VIRGINIA	
54057	MINERAL	WV	19060	"Cumberland, MD-WV"	50023	"Mineral County, WV"	51	WEST VIRGINIA	
72023	CABO ROJO	PR	41900	"San Germn, PR"	50025	"San German-Cabo Rojo, PR"	32420	"Mayagez, PR"	
72079	LAJAS	PR	41900	"San Germn, PR"	50025	"San German-Cabo Rojo, PR"	32420	"Mayagez, PR"	
72121	SABANA GRANDE	PR	41900	"San Germn, PR"	50025	"San German-Cabo Rojo, PR"	32420	"Mayagez, PR"	
72125	SAN GERMAN	PR	41900	"San Germn, PR"	50025	"San German-Cabo Rojo, PR"	32420	"Mayagez, PR"	
"Notes: The Original CBSA and Original CBSA Name are based on the CBSA delineations from 2010 Decennial Census data which were issued by OMB on February 28, 2013 through OMB Bulletin No. 13-01 and updated through OMB Bulletin Nos 15-01, 17-01, 18-03, 18-04, and 20-01. The Revised CBSA and Revised CBSA Name reflect the revised CBSA delineations from the 2020 Decennial Census data which were issued by OMB on July 21, 2023 through OMB Bulletin No. 23-01. Transition CBSA and Transition CBSA Name reflect the CBSA each county is assigned to as detailed in the April 2025 Update of the Ambulatory Surgical Center (ASC) Payment System, CR 14017. CY 2025 Transition CBSAs were required if the final 2025 ASC wage index of the revised CBSA would result in a decline in more than 5% of the county or county equivalent's CY 2024 wage index value from the Original CBSA.

As discussed in the April 2025 Update of the Ambulatory Surgical Center (ASC) Payment System, CR 14017, as a result of the revised delineations from the 2020 Decennial Census and the 5% limit on wage index declines, certain counties or county equivalents may require a transition CBSA to denote their unique wage index assignment as the county transitions to its new and lower CBSA wage index value. Counties and county equivalents currently assigned to a transition CBSA are marked with a double asterisk. Based on the proposed CY 2026 ASC wage index values and the 5% limit on wage index declines, the Proposed CY 2026 CBSA includes transition CBSAs that would be required for some counties and county equivalents for CY 2026."									
									
									
									
									
