HCPCS S Modifiers codes

Modifiers	Modifier description
SA	Nurse practitioner rendering service in collaboration with a physician
SB	Nurse midwife
SC	Medically necessary service or supply
SD	Services provided by registered nurse with specialized, highly technical home infusion training
SE	State and/or federally-funded programs/services
SF	Second opinion ordered by a professional review organization (pro) per section 9401, p.l. 99-272 (100% reimbursement - no medicare deductible or coinsurance)
SG	Ambulatory surgical center (asc) facility service
SH	Second concurrently administered infusion therapy
SJ	Third or more concurrently administered infusion therapy
SK	Member of high risk population (use only with codes for immunization)
SL	State supplied vaccine
SM	Second surgical opinion
SN	Third surgical opinion
SQ	Item ordered by home health
SS	Home infusion services provided in the infusion suite of the iv therapy provider
ST	Related to trauma or injury
SU	Procedure performed in physician's office (to denote use of facility and equipment)
SV	Pharmaceuticals delivered to patient's home but not utilized
SW	Services provided by a certified diabetic educator
SY	Persons who are in close contact with member of high-risk population (use only with codes for immunization)
SZ	Habilitative services