MycosisFungoides - CS Extension

Note 1: For skin, patch indicates any size skin lesion without significant elevation or induration.
Note 2: For skin, plaque indicates any size skin lesion that is elevated or indurated.
Note 3: For skin, tumor indicates at least one 1 centimeter (cm) diameter solid or nodular lesion with evidence of depth and/or vertical growth. If a physician describes a skin lesion of less than 1 cm as a tumor, use code 550.
Note 4: Use code 150 when skin involvement is present but only a general location/site is mentioned (i.e., face, torso, arms, legs). Use code 300 when there is skin involvement but there is no mention of location/site.
Note 5: Ignore erythroderma if stated to involve less than 50% of the skin. Use codes 110-150, 210-230, 300, 550, 600.
Note 6: Physicians use more than one method to estimate percentage of skin involvement by mycosis fungoides (MF). Code percent of skin involvement as stated by the physician. If no percentage is stated and no word such as localized or generalized is used and no stage is given, code as percent not stated.
Note 7: Use code 950 ONLY if there is no evidence of any type of skin involvement, including plaques, papules, patches, or tumors. Tumor size is coded as 000 in CS Tumor Size only if there is no evidence of any tumor(s) as defined in the CS Tumor Size table note.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
100	OBSOLETE DATA RETAINED V0200 Plaques, papules, or erythematous patches ("plaque stage"): Less than 10 % of skin surface, no tumors Limited plaques/patches MFCG Stage I	ERROR	T1	L	L
110	Patches only with less than 10% of skin surface involved	T1a	T1	L	L
120	Plaques or papules, with or without patches, with less than 10% of skin surface involved, no tumors	T1b	T1	L	L
130	Skin involvement less than 10%, not stated whether plaques, papules or patches, no tumors Limited plaques/patches	T1NOS	T1	L	L
150	Plaques, papules, or erythematous patches: % body surface not stated, no tumors	T1NOS	T1	L	L
200	OBSOLETE DATA RETAINED V0200 Plaques, papules, or erythematous patches ("plaque stage"): Greater than or equal to 10% of skin surface, no tumors Generalized plaques/patches MFCG Stage II	ERROR	T2	L	L
210	Patches only with 10% or more of skin surface involved	T2a	T2	L	L
220	Plaques or papules, with or without patches, with 10% or more of skin surface involved, no tumors	T2b	T2	L	L
230	Skin involvement 10% or more, not stated whether plaques, papules or patches, no tumors Generalized plaques/patches Stated as T2, NOS	T2NOS	T2	L	L
250	OBSOLETE DATA CONVERTED V0203 See code 150 Plaques, papules, or erythematous patches: % body surface not stated, no tumors	ERROR	ERROR	ERROR	ERROR
300	Skin involvement, NOS: Extent not stated, no tumors Localized, NOS	T1NOS	T1	L	L
500	OBSOLETE DATA RETAINED V0200 One or more tumors (tumor stage) Cutaneous tumors	ERROR	T3	RE	RE
550	Skin lesion described as tumor less than 1 cm	T2NOS	T3	RE	RE
600	One or more tumors equal to 1 cm or greater Cutaneous tumor, size not stated	T3	T3	RE	RE
650	OBSOLETE DATA CONVERTED V0203 See code 740 Stated as T3 with no other information on extension	ERROR	ERROR	ERROR	ERROR
700	OBSOLETE DATA RETAINED V0200 Generalized erythroderma (greater than 50% of body involved with diffuse redness) Sezary syndrome/Sezary disease MFCG Stage III	ERROR	T4	RE	RE
730	Generalized erythroderma (Greater than 50% less than 80% body surface involved with diffuse redness)	T3	T4	RE	RE
740	Stated as T3 with no other information on extension	T3	T3	RE	RE
750	Generalized erythroderma (Equal to or greater than or equal to 80% body surface involved with diffuse redness)	T4	T4	RE	RE
800	Stated as T4 with no other information on extension	T4	T4	RE	RE
950	No evidence of primary tumor	T0	T0	U	U
999	Unknown; extension not stated Primary tumor cannot be assessed Not documented in patient record	TX	TX	U	U