5.6.2.8 Type of Services (TOS)

The TOS identifies the specific field or specialty of services provided. TOS codes are not required for billing, but they do appear on the provider’s Remittance and Status (R&S) Reports.

For procedure codes that require a modifier to assign a TOS, providers can refer to the appropriate specific section for information on modifier requirements for claim submissions.

TOS	Description
0	Blood
1	Medical Services
2	Surgery
3	Consultations
4	Radiology (total component)
5	Laboratory (total component)
6	Radiation Therapy (total component)
7	Anesthesia
8	Assistant surgery
9	Other (e.g., prosthetic eyewear, contacts, ambulance)
C	Home health services
E	Eyeglasses
F	Ambulatory surgical center (ASC)/hospital-based ambulatory surgical center (HASC)
G	Genetics
I	Professional component for radiology, laboratory, or radiation therapy
J	DME purchase new
L	DME rental
R	Hearing aid
T	Technical component for radiology, laboratory, or radiation therapy
W	Dental