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) |
N/A |
N/A |
N/A |
