G9645 HCPCS code: Patients who did not abstain from smoking prior to anesthesia on the day of surgery or procedure
G9645 is the HCPCS Level II code for patients who did not abstain from smoking prior to anesthesia on the day of surgery or procedure. Its Medicare coverage code is C (Carrier judgment): Coverage is decided by the Medicare contractor (MAC) case by case.
Code details
| Field | Value |
|---|---|
| Section | G codes — Procedures and professional services (temporary) |
| Coverage code | C — Carrier judgment |
| Pricing indicator | 00 — Not separately priced by Medicare |
| BETOS category | Z2 |
| Added | 2016-01-01 |
| Last action effective | 2016-01-01 |
What changed for G9645
- 2016-01-01: G9645 added to HCPCS Level II
- Next scheduled CMS quarterly update (HCPCS and DMEPOS fee schedule): 2027-01-01
Frequently asked questions
What is HCPCS code G9645?
G9645 is the HCPCS Level II code for patients who did not abstain from smoking prior to anesthesia on the day of surgery or procedure. Short descriptor: "Had smoke b/4 anes day surg".
Does Medicare cover G9645?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
Related G96 codes
- G9600 — Symptomatic aaas that required urgent/emergent (non-elective) repair
- G9601 — Patient discharge to home no later than post-operative day #7
- G9602 — Patient not discharged to home by post-operative day #7
- G9603 — Patient survey score improved from baseline following treatment
- G9604 — Patient survey results not available
- G9605 — Patient survey score did not improve from baseline following treatment
- G9606 — Intraoperative cystoscopy performed to evaluate for lower tract injury
- G9607 — Documented medical reasons for not performing intraoperative cystoscopy (e.g., urethral pathology precluding cystoscopy, any patient who has a congenital or acquired absence of the urethra) or in the case of patient death
- G9608 — Intraoperative cystoscopy not performed to evaluate for lower tract injury
- G9609 — Documentation of an order for anti-platelet agents
- G9610 — Documentation of medical reason(s) in the patient's record for not ordering anti-platelet agents
- G9611 — Order for anti-platelet agents was not documented in the patient's record, reason not given
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Next steps
- Run a reimbursement report for a device billed under G9645
- Watch G9645 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for G9645
Sources: CMS HCPCS Level II release October 2025; CMS DMEPOS fee schedule; CMS NCCI MUE tables; CMS Medicare utilization (physician and DME supplier files); CMS Medicare Coverage Database articles. Fees are Medicare allowables, not commercial rates. Not billing or legal advice.