CS Mets at DX

Notes

**Note**: For metastasis limited to a single distant lymph node chain, use code 08, 16 or 18. For metastases involving multiple distant lymph node chains, use codes 31 or 33.
Code Description AJCC 7 M AJCC 6 M Summary Stage 1977 M Summary Stage 2000 M
00 No distant metastasis M0 M0 NONE NONE
08 Metastasis limited to a single distant lymph node chain:
For cecum, ascending, hepatic flexure and transverse colon:
Superior mesenteric lymph nodes only		 M1a M1 RN D
10 OBSOLETE DATA RETAINED V0200
See codes 15 and 25

Distant lymph node(s) other than code 08
For all colon sites:
Common iliac
Distant lymph node(s), NOS
External iliac
Para-aortic
Retroperitoneal
For cecum,
appendix,
ascending
colon,
transverse colon,
and hepatic flexure;
Inferior mesenteric
For splenic flexure,
descending colon, and
sigmoid colon:
Superior mesenteric		 ERROR: M1 D D
15 OBSOLETE DATA CONVERTED V0203
See code 16

Metastasis to a single distant lymph node chain other than code 08
For all colon sites:
Common iliac
Distant lymph node(s), NOS
External iliac
Para-aortic
Retroperitoneal
For cecum, ascending colon, transverse colon, and hepatic flexure:
Inferior mesenteric
For splenic flexure, descending colon, and sigmoid colon:
Superior mesenteric		 ERROR: ERROR: ERROR: ERROR:
16 Metastasis limited to a single distant lymph node chain: For all colon sites:
Common iliac
Distant lymph node(s), NOS
External iliac
Para-aortic
Retroperitoneal
For cecum, ascending colon, transverse colon, and hepatic flexure:
Inferior mesenteric
For splenic flexure, descending colon, and sigmoid colon:
Superior mesenteric		 M1a M1 D D
18 Metastasis limited to a single distant lymph node chain, NOS M1a M1 RN D
20 OBSOLETE DATA CONVERTED V0203
See code 26

Metastasis to a single distant organ		 ERROR: ERROR: ERROR: ERROR:
22 OBSOLETE DATA CONVERTED V0203
See code 27

Stated as M1a with no other information on distant metastases		 ERROR: ERROR: ERROR: ERROR:
25 OBSOLETE DATA CONVERTED V0203
See code 31

Metastasis to more than one distant lymph node chain other than code 08
For all colon sites:
Common iliac
Distant lymph node(s), NOS
External iliac
Para-aortic
Retroperitoneal
For cecum, ascending colon, transverse colon, and hepatic flexure:
Inferior mesenteric
Superior mesenteric
For splenic flexure, descending colon, and sigmoid colon:
Superior mesenteric		 ERROR: ERROR: ERROR: ERROR:
26 Metastasis limited to a single distant organ except peritoneum M1a M1 D D
27 Stated as M1a with no other information on distant metastasis M1a M1 D D
29 OBSOLETE DATA CONVERTED V0204
See code 08

Metastases to multiple distant lymph node chains included in code 08 only		 ERROR: ERROR: ERROR: ERROR:
30 OBSOLETE DATA CONVERTED V0203
See code 36

Metastases to more than one distant organ
Metastases to the peritoneum
Carcinomatosis		 ERROR: ERROR: ERROR: ERROR:
31 Metastases to a single distant lymph node chain listed in code 08 and to a single distant lymph node chain listed in code 16 OR Multiple distant lymph node chains listed in code 16, with or without distant lymph nodes listed in code 08 M1b M1 D D
33 Metastases to multiple distant lymph node chains, NOS M1b M1 D D
35 OBSOLETE DATA CONVERTED V0203
See code 45

(08 or 15 or 25) PLUS (20 or 30)
Distant lymph nodes plus other distant metastases		 ERROR: ERROR: ERROR: ERROR:
36 Metastases to more than one distant organ except distant lymph node(s)
Metastasis to peritoneum
Carcinomatosis		 M1b M1 D D
38 OBSOLETE DATA CONVERTED V0203
See code 48

Stated as M1b with no other information on distant metastases		 ERROR: ERROR: ERROR: ERROR:
40 OBSOLETE DATA RETAINED V0200
See codes 20, 30 and 60

Distant metastases except distant lymph node(s)(codes 08-10)
Carcinomatosis		 ERROR: M1 D D
45 (26 or 36) + any of (08, 16, 18, or 31)

Metastases to distant organs plus distant nodes		 M1b M1 D D
48 Stated as M1b with no other information on distant metastasis M1b M1 D D
50 OBSOLETE DATA RETAINED V0200
See code 35

(40) + ((08) or (10))
Distant lymph node(s) plus other distant metastases		 ERROR: M1 D D
60 Distant metastasis, NOS

Stated as M1 [NOS] with no other information on distant metastases		 M1NOS M1 D D
99 Unknown; distant metastasis not stated
Distant metastasis cannot be assessed
Not documented in patient record		 M0 MX U U