LEVEL I NATIONAL MODIFIERS

Year: 2001

Modifier	Short Description	Effective Date	Discontinued Date
20	Microsurgery	1/1/84	12/31/98
21	Prolonged E&M services	1/1/84
22	Unusual procedural services	1/1/84
23	Unusual anesthesia	1/1/84
24	Unrelated E&M same MD postop	1/1/84
25	Sig sep iden E&M same MD/day	1/1/84
26	Professional component	1/1/84
32	Mandated services	1/1/84
47	Anesthesia by surgeon	1/1/84
50	Bilateral procedure	1/1/84
51	Multiple procedures	1/1/84
52	Reduced services	1/1/84
53	Discontinued procedure	1/1/97
54	Surgical care only	1/1/84
55	Postoperative managemnt only	1/1/84
56	Preoperative management only	1/1/84
57	Decision for surgery	1/1/84
58	Staged/rel proc sm MD postop	1/1/84
59	Distinct procedural service	1/1/97
60	Altered surgical field	1/1/01
62	Two surgeons	1/1/84
66	Surgical team	1/1/84
73	Proc discntd prior to anes	1/1/99
74	Proc discntd after anesth	1/1/99
76	Repeat procedure by same MD	1/1/84
77	Repeat procedure another MD	1/1/84
78	Return to or rel svc postop	1/1/84
79	Unrel proc/svc sm MD postop	1/1/84
80	Assistant surgeon	1/1/84
81	Minimum assistant surgeon	1/1/84
82	Asst surgeon (res not avail)	1/1/84
90	Reference (outside) lab	1/1/84
91	Repeat clincl diag lab test	1/1/00
99	Multiple modifiers	1/1/84

Last Updated on 3/6/01
By Michael Hadad

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