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Appendix Y-Grouper Versions Used by Year Reference Table

The values in the CURRENT, PRIOR and NEW Federal, AP State and APR State DRG and MDC fields are dependent upon the discharge year of the patient. Listed below are the version numbers of the groupers used with the highest numbered DRG for that version in parentheses.

M denotes that the 3M ICD-9 Code mapper is installed.
* denotes that the mapper was invoked to map codes forward.

YEAR CURRENT PRIOR NEW
Federal AP State APR State Federal AP State APR State Federal AP State APR State
DRG MDC DRG MDC DRG MDC DRG MDC DRG MDC DRG MDC DRG MDC DRG MDC DRG MDC
1980-85 NA(383) 2.0(470) N/A N/A N/A N/A N/A N/A N/A
1986 2.0(470) 3.0(471) N/A N/A N/A N/A N/A N/A N/A
1987 4.0(473) 5.0(475) N/A N/A N/A N/A N/A N/A N/A
1988 5.0(475) 5.0(714) N/A N/A N/A N/A N/A N/A N/A
1989 6.0(477) 6.0(752) N/A N/A N/A N/A N/A N/A N/A
1990 7.0(477) 7.0(758) N/A 6.0(477) 6.0(752) N/A 8.0(490) 8.0(785) N/A
1991 8.0(490) 8.0(785) N/A 7.0(477) 7.0(758) N/A 9.0(492) 9.0(794) N/A
1992 9.0(492) 9.0(794) N/A 8.0(490) 8.0(785) N/A 10.0(492) 10.0(794) N/A
1993 10.0(492) 10.0(794) N/A 9.0(490) 9.0(794) N/A 11.0(494) 11.0(802) N/A
1994 11.0(494) 11.0(802) N/A 10.0(492) 10.0(794) N/A 12.0(495) 12.0(809) N/A
1995 12.0(495) 12.0(809) N/A 11.0(494) 11.0(802) N/A 13.0(495) 12.0(809)M N/A
1996 13.0(495) 12.0(809)M N/A 12.0(495) 12.0(809) N/A 14.0(495) 14.1(809) N/A
1997 14.0(495) 14.1(809) N/A 13.0(495) 12.0(809)M N/A 15.0(503) 14.1(809)M N/A
1998 15.0(503) 14.1(809)M N/A 14.0(495) 14.1(809) N/A 16.0(511) 14.1(809)M N/A
1999 16.0(511) 14.1(809)M N/A 15.0(503) 14.1(809)M N/A 16.0(511) 14.1(809)M N/A
2000 16.0(511)M 14.1(809)M N/A 16.0(511) 14.1(809)M N/A 18.0(511) 18.0(828) N/A
2001 18.0(511) 18.0(828) N/A 16.0(511)M 14.1(809)M N/A 19.0(523) 18.0(828)M N/A
2002 19.0(523) 18.0(828)M N/A 18.0(511) 18.0(828) N/A 20.0(527) 18.0(828)M N/A
2003 20.0(527) 18.0(828)M N/A 19.0(523) 18.0(828)M N/A 21.0(540) 21.0(876) N/A
2004 21.0(540) 21.0(876) 20.0(R20)* 20.0(527) 18.0(828)M 20.0(R20) 22.0(543) 21.0(876)M 20.0*
2005 22.0(543) 21.0(876)M 20.0(R20)* 21.0(540) 21.0(876) 20.0(R20)* 23.0(559) 23.0(886) 20.0(R20)*
2006 23.0(559) 23.0(886) 20.0(R20)* 22.0(543) 21.0(876)M 20.0(R20)* 24.0(579) 24.0(88A) 24.0(R24)
2007 24.0(579) 24.0(88A) 24.0(R24) 23.0(559) 23.0(886) 20.0(R20)* 25.0(F25) 25.0(S25) 25.0(R25)
1-3/2008 25.0(F25) 25.0(S25) 25.0(R25) 24.0(579) 24.0(88A) 24.0(R24) 26.0(F26) 26.0(S26) 26.0(R26)
4-12/2008 25.1(F2A) 25.1(S2A) 25.1(R25) 24.0(579) 24.0(88A) 24.0(R24) 26.0(F26) 26.0(S26) 26.0(R26)
2009 26.0(F26) 26.0(S26) 26.0(R26) 25.1(F2A) 25.1(S2A) 25.1(R25) 27.0(F27) 27.0(S27) 27.0(R27)
2010 27.0(F27) 27.0(S27) 27.0(R27) 26.0(F26) 26.0(S26) 26.0(R26) 28.0(F28) 27.0(S27) 28.0(R28)
2011 28.0(F28) 27.0(S27) 28.0(R28) 27.0(F27) 27.0(S27) 27.0(R27) 29.0(F29) N/A 29.0(R29)
2012 29.0(F29) N/A 29.0(R29) 28.0(F28) 27.0(S27) 28.0(R28) 30.0(F30) N/A 30.0(R30)
2013 30.0(F28) N/A 30.0(R30) 29.0(F27) N/A 29.0(R29) N/A N/A N/A

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