G9429 – 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)
HCPCS Level II code · G codes: Procedures / Professional Services (Temporary)
HCPCS codeG9429
- Long description
- 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)
- Short description
- Doc med rsn no pt cat
- Pricing indicator
00Not separately priced by Part B (bundled, not covered or Part A only)- Medicare coverage
CCarrier judgment – coverage decided by the Medicare contractor- BETOS category
Z2Undefined codes- Added
- January 1, 2015
- Last change
- January 1, 2022 – No change
Frequently asked questions
What is HCPCS code G9429?
G9429 is a HCPCS Level II code for 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).
Does Medicare cover G9429?
The HCPCS file lists coverage code C: Carrier judgment – coverage decided by the Medicare contractor. Coverage and payment also depend on local coverage determinations and the patient’s plan.
Nearby G codes
- G9421 – Primary non-small cell lung cancer lung biopsy and cytology specimen report does not document classification into specific histologic type or histologic type does not follow iaslc guidance or is classified as nsclc-nos but without an explanation
- G9422 – Primary lung carcinoma resection report documents pt category, pn category and for non-small cell lung cancer, histologic type (e.g., squamous cell carcinoma, adenocarcinoma and not nsclc-nos)
- G9423 – Documentation of medical reason for not including pt category, pn category and histologic type [for patient with appropriate exclusion criteria (e.g., metastatic disease, benign tumors, malignant tumors other than carcinomas, inadequate surgical specimens)]
- G9424 – Specimen site other than anatomic location of lung, or classified as nsclc-nos
- G9425 – Primary lung carcinoma resection report does not document pt category, pn category and for non-small cell lung cancer, histologic type (e.g., squamous cell carcinoma, adenocarcinoma)
- G9426 – Improvement in median time from ed arrival to initial ed oral or parenteral pain medication administration performed for ed admitted patients
- G9427 – Improvement in median time from ed arrival to initial ed oral or parenteral pain medication administration not performed for ed admitted patients
- G9428 – Pathology report includes the pt category, thickness, ulceration and mitotic rate, peripheral and deep margin status and presence or absence of microsatellitosis for invasive tumors
- G9430 – Specimen site other than anatomic cutaneous location
- G9431 – Pathology report does not include the pt category, thickness, ulceration and mitotic rate, peripheral and deep margin status and presence or absence of microsatellitosis for invasive tumors
- G9432 – Asthma well-controlled based on the act, c-act, acq, or ataq score and results documented
- G9433 – Death, permanent nursing home resident or receiving hospice or palliative care any time during the measurement period
- G9434 – Asthma not well-controlled based on the act, c-act, acq, or ataq score, or specified asthma control tool not used, reason not given
- G9435 – Aspirin prescribed at discharge
- G9436 – Aspirin not prescribed for documented reasons (e.g., allergy, medical intolerance, history of bleed)
- G9437 – Aspirin not prescribed at discharge
Source: CMS HCPCS Level II quarterly file, October 2026. Reference only – check payer policy before billing.