G0173 — Linear accelerator based stereotactic radiosurgery, complete course of therapy in one session
G0173 is a HCPCS Level II code for linear accelerator based stereotactic radiosurgery, complete course of therapy in one session. It belongs to the Procedures and Professional Services (Temporary) section. It was terminated on December 31, 2014 and is not valid on new claims.
This code has been terminated
CMS terminated G0173 on December 31, 2014. It stays in the file as history — a claim you are auditing from before that date may legitimately carry it — but it must not appear on a new claim. The adjacent codes below are the usual place to look for its replacement.
Medicare coverage: Special coverage instructions apply
There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q3-Jul. This states Medicare’s position on the code, not on your particular claim.
The CMS record for G0173
- Long descriptor
- Linear accelerator based stereotactic radiosurgery, complete course of therapy in one session
- Short descriptor
- Linear acc stereo radsur com
- Added
- August 1, 2000
- Terminated
- December 31, 2014
- BETOS
- P5E
- Pricing indicator
- 00 — Not priced by Part B
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
When CMS retired it.
Berenson-Eggers Type of Service — CMS's own analytic grouping.
Service not separately priced by Part B — not covered, bundled into another service, or used by Part A only.
Codes adjacent to G0173
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If G0173 is not quite right, the correct code is very often within a few positions of it.
- G0159Services performed by a qualified physical therapist, in the home health setting, in the establishment or delivery of a safe and effective physical therapy maintenance program, each 15 minutes
- G0160Services performed by a qualified occupational therapist, in the home health setting, in the establishment or delivery of a safe and effective occupational therapy maintenance program, each 15 minutes
- G0161Services performed by a qualified speech-language pathologist, in the home health setting, in the establishment or delivery of a safe and effective speech-language pathology maintenance program, each 15 minutes
- G0162Skilled services by a registered nurse (rn) for management and evaluation of the plan of care; each 15 minutes (the patient's underlying condition or complication requires an rn to ensure that essential non-skilled care achieves its purpose in the home health or hospice setting)
- G0163Skilled services of a licensed nurse (lpn or rn) for the observation and assessment of the patient's condition, each 15 minutes (the change in the patient's condition requires skilled nursing personnel to identify and evaluate the patient's need for possible modification of treatment in the home health or hospice setting)terminated
- G0164Skilled services of a licensed nurse (lpn or rn), in the training and/or education of a patient or family member, in the home health or hospice setting, each 15 minutesterminated
- G0166External counterpulsation, per treatment session
- G0168Wound closure utilizing tissue adhesive(s) only
- G0175Scheduled interdisciplinary team conference (minimum of three exclusive of patient care nursing staff) with patient present
- G0176Activity therapy, such as music, dance, art or play therapies not for recreation, related to the care and treatment of patient's disabling mental health problems, per session (45 minutes or more)
- G0177Training and educational services related to the care and treatment of patient's disabling mental health problems per session (45 minutes or more)
- G0179Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and allowed practitioners to affirm the initial implementation of the plan of care
- G0180Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and allowed practitioners to affirm the initial implementation of the plan of care
- G0181Physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allowed practitioner development and/or revision of care plans
- G0182Physician supervision of a patient under a medicare-approved hospice (patient not present) requiring complex and multidisciplinary care modalities involving regular physician development and/or revision of care plans, review of subsequent reports of patient status, review of laboratory and other studies, communication (including telephone calls) with other health care professionals involved in the patient's care, integration of new information into the medical treatment plan and/or adjustment of medical therapy, within a calendar month, 30 minutes or more
- G0183Quantitative software measurements of cardiac volume, cardiac chambers volumes and left ventricular wall mass derived from ct scan(s) data of the chest/heart (with or without contrast)
Questions about G0173
What is HCPCS code G0173?
G0173 is a HCPCS Level II code for linear accelerator based stereotactic radiosurgery, complete course of therapy in one session. It sits in the Procedures and Professional Services (Temporary) section.
Does Medicare cover G0173?
The CMS HCPCS file marks G0173 as "Special coverage instructions apply". There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.
Is G0173 still valid?
No. G0173 was terminated on December 31, 2014 and should not be used on new claims.