How to billing hospital consultation service

New Medicare Coding for Consultation Services

Crosswalks for Emergency Department Consultations requiring admission of patient into inpatient facility
CPT Consultative Services Code	CPT E/M Codes for Crosswalking	Modifier Required
99251	99221 (Inpatient Initial Visit, level 1)	Yes, you will need to append Modifier “AI”
99252	99221 (Inpatient Initial Visit, level 1) or 99222 (Inpatient Initial Visit, level 2)	Yes, you will need to append Modifier “AI”
99253	99222 (Inpatient Initial Visit, level 1)	Yes, you will need to append Modifier “AI”
99254	99222 (Inpatient Initial Visit, level 2) or 99222 (Inpatient Initial Visit, level 3)	Yes, you will need to append Modifier “AI”
99255	99223 (Inpatient Initial Visit, level 3)	Yes, you will need to append Modifier “AI”
Crosswalks for Inpatient Consultations
CPT Consultative Services Code	CPT E/M Codes for Crosswalking	Modifier Required
99251	99221 (Inpatient Initial Visit, level 1)	Yes, referring physician (not you) will need to append Modifier “AI”
99252	99221 (Inpatient Initial Visit, level 1) or 99222 (Inpatient Initial Visit, level 2)	Yes, referring physician (not you) will need to append Modifier “AI”
99253	99222 (Inpatient Initial Visit, level 1)	Yes, referring physician (not you) will need to append Modifier “AI”
99254	99222 (Inpatient Initial Visit, level 2) or 99222 (Inpatient Initial Visit, level 3)	Yes, referring physician (not you) will need to append Modifier “AI”
99255	99223 (Inpatient Initial Visit, level 3)	Yes, referring physician (not you) will need to append Modifier “AI”