HCPCS Level II · Procedures and professional services (temporary)
G8946Minimally invasive biopsy method attempted but not diagnostic of breast cancer (e.g., high risk lesion of breast such as atypical ductal hyperplasia, lobular neoplasia, atypical lobular hyperplasia, lobular carcinoma in situ, atypical columnar hyperplasia, flat epithelial atypia, radial scar, complex sclerosing lesion, papillary lesion, or any lesion with spindle cells)
Source: CMS HCPCS quarterly update, October 2026. Page updated September 29, 2026.
About G8946
G8946 is an HCPCS Level II code in the G series (procedures and professional services (temporary)), describing minimally invasive biopsy method attempted but not diagnostic of breast cancer (e.g., high risk lesion of breast such as atypical ductal hyperplasia, lobular neoplasia, atypical lobular hyperplasia, lobular carcinoma in situ, atypical columnar hyperplasia, flat epithelial atypia, radial scar, complex sclerosing lesion, papillary lesion, or any lesion with spindle cells).
It was added to HCPCS effective 01/01/2013, and its current record took effect 01/01/2014.
Its Medicare coverage code is "C", meaning coverage is left to the Medicare contractor's judgment.
Details
- Short description
- Mibm but no dx of breast ca
- Date added
- 01/01/2013
- Action effective
- 01/01/2014
- BETOS
- M5B
Related G89xx codes
- G8907Patient documented not to have experienced any of the following events: a burn prior to discharge; a fall within the facility; wrong site/side/patient/procedure/implant event; or a hospital transfer or hospital admission upon discharge from the facility
- G8908Patient documented to have received a burn prior to discharge
- G8909Patient documented not to have received a burn prior to discharge
- G8910Patient documented to have experienced a fall within asc
- G8911Patient documented not to have experienced a fall within ambulatory surgical center
- G8912Patient documented to have experienced a wrong site, wrong side, wrong patient, wrong procedure or wrong implant event
- G8913Patient documented not to have experienced a wrong site, wrong side, wrong patient, wrong procedure or wrong implant event
- G8914Patient documented to have experienced a hospital transfer or hospital admission upon discharge from asc
- G8915Patient documented not to have experienced a hospital transfer or hospital admission upon discharge from asc
- G8916Patient with preoperative order for iv antibiotic surgical site infection (ssi) prophylaxis, antibiotic initiated on time
- G8917Patient with preoperative order for iv antibiotic surgical site infection (ssi) prophylaxis, antibiotic not initiated on time
- G8918Patient without preoperative order for iv antibiotic surgical site infection (ssi) prophylaxis
Common questions about G8946
Is HCPCS G8946 still valid?
- Yes. G8946 is active in the CMS October 2026 HCPCS file.
Does Medicare cover G8946?
- Its coverage code is "C": coverage is left to the Medicare contractor's judgment. Check the local coverage determination for your region.