HCPCS Level II · Procedures and professional services (temporary)
G9429Documentation of medical reason(s) for not including pt category, thickness, ulceration and mitotic rate, peripheral and deep margin status and presence or absence of microsatellitosis for invasive tumors (e.g., negative skin biopsies, insufficient tissue, or other documented medical reasons)
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Source: CMS HCPCS quarterly update, October 2026. Page updated September 29, 2026.
About G9429
G9429 is an HCPCS Level II code in the G series (procedures and professional services (temporary)), describing documentation of medical reason(s) for not including pt category, thickness, ulceration and mitotic rate, peripheral and deep margin status and presence or absence of microsatellitosis for invasive tumors (e.g., negative skin biopsies, insufficient tissue, or other documented medical reasons).
It was added to HCPCS effective 01/01/2015, and its current record took effect 01/01/2022.
Its Medicare coverage code is "C", meaning coverage is left to the Medicare contractor's judgment.
Details
- Short description
- Doc med rsn no pt cat
- Date added
- 01/01/2015
- Action effective
- 01/01/2022
- BETOS
- Z2
Related G94xx codes
- G9408Patients with cardiac tamponade and/or pericardiocentesis occurring within 30 days
- G9409Patients without cardiac tamponade and/or pericardiocentesis occurring within 30 days
- G9410Patient admitted within 180 days, status post cied implantation, replacement, or revision with an infection requiring device removal or surgical revision
- G9411Patient not admitted within 180 days, status post cied implantation, replacement, or revision with an infection requiring device removal or surgical revision
- G9412Patient admitted within 180 days, status post cied implantation, replacement, or revision with an infection requiring device removal or surgical revision
- G9413Patient not admitted within 180 days, status post cied implantation, replacement, or revision with an infection requiring device removal or surgical revision
- G9414Patient had one dose of meningococcal vaccine (serogroups a, c, w, y or a, c, w, y, b) on or between the patient's 10th and 13th birthdays
- G9415Patient did not have one dose of meningococcal vaccine (serogroups a, c, w, y or a, c, w, y, b), on or between the patient's 10th and 13th birthdays
- G9416Patient had one tetanus, diphtheria toxoids and acellular pertussis vaccine (tdap) on or between the patient's 10th and 13th birthdays
- G9417Patient did not have one tetanus, diphtheria toxoids and acellular pertussis vaccine (tdap) on or between the patient's 10th and 13th birthdays
- G9418Primary non-small cell lung cancer lung biopsy and cytology specimen report documents classification into specific histologic type following iaslc guidance or classified as nsclc-nos with an explanation
- G9419Documentation of medical reason(s) for not including the histological type or nsclc-nos classification with an explanation (e.g. specimen insufficient or non-diagnostic, specimen does not contain cancer, or other documented medical reasons)
Common questions about G9429
Is HCPCS G9429 still valid?
- Yes. G9429 is active in the CMS October 2026 HCPCS file.
Does Medicare cover G9429?
- Its coverage code is "C": coverage is left to the Medicare contractor's judgment. Check the local coverage determination for your region.