G9644 — Patients who abstained from smoking prior to anesthesia on the day of surgery or procedure
G9644 is a HCPCS Level II code for patients who abstained from smoking prior to anesthesia on the day of surgery or procedure. It belongs to the Procedures and Professional Services (Temporary) section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Carrier judgment
Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
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.
Physician fee schedule statusM
Measurement code. Used for reporting purposes only; never paid.
Global period: XXX
Want the dollar amount for your locality? The fee calculator applies your GPCI and the current conversion factor.
The CMS record for G9644
- Long descriptor
- Patients who abstained from smoking prior to anesthesia on the day of surgery or procedure
- Short descriptor
- No smok b/4 anes day of surg
- Added
- January 1, 2016
- BETOS
- Z2
- 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.
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 G9644
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If G9644 is not quite right, the correct code is very often within a few positions of it.
- G9636Health-related quality of life not assessed with tool during at least two visits or quality of life score declinedterminated
- G9637Final reports with documentation of one or more dose reduction techniques (e.g., automated exposure control, adjustment of the ma and/or kv according to patient size, use of iterative reconstruction technique)
- G9638Final reports without documentation of one or more dose reduction techniques (e.g., automated exposure control, adjustment of the ma and/or kv according to patient size, use of iterative reconstruction technique)
- G9639Major amputation or open surgical bypass not required within 48 hours of the index endovascular lower extremity revascularization procedureterminated
- G9640Documentation of planned hybrid or staged procedureterminated
- G9641Major amputation or open surgical bypass required within 48 hours of the index endovascular lower extremity revascularization procedureterminated
- G9642Current smoker (e.g., cigarette, cigar, pipe, e-cigarette or marijuana)
- G9643Elective surgery
- G9645Patients who did not abstain from smoking prior to anesthesia on the day of surgery or procedure
- G9646Patients with 90 day mrs score of 0 to 2
- G9647Patients in whom mrs score could not be obtained at 90 day follow-upterminated
- G9648Patients with 90 day mrs score greater than 2
- G9649Psoriasis assessment tool documented meeting any one of the specified benchmarks (e.g., (pga; 5-point or 6-point scale), body surface area (bsa), psoriasis area and severity index (pasi) and/or dermatology life quality index) (dlqi))
- G9650Documentation that the patient declined therapy change or has documented contraindications (e.g., experienced adverse effects or lack of efficacy with all other therapy options) in order to achieve better disease control as measured by pga, bsa, pasi, or dlqiterminated
- G9651Psoriasis assessment tool documented not meeting any one of the specified benchmarks (e.g., (pga; 5-point or 6-point scale), body surface area (bsa), psoriasis area and severity index (pasi) and/or dermatology life quality index) (dlqi)) or psoriasis assessment tool not documented
- G9652Patient has been treated with a systemic or biologic medication for psoriasis for at least six monthsterminated
Questions about G9644
What is HCPCS code G9644?
G9644 is a HCPCS Level II code for patients who abstained from smoking prior to anesthesia on the day of surgery or procedure. It sits in the Procedures and Professional Services (Temporary) section.
Does Medicare cover G9644?
The CMS HCPCS file marks G9644 as "Carrier judgment". Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
How is G9644 paid under the physician fee schedule?
G9644 carries PFS status code M. Measurement code. Used for reporting purposes only; never paid.