G9599 — Aortic aneurysm 6.0 cm or greater maximum diameter on centerline formatted ct or minor diameter on axial formatted ct
G9599 is a HCPCS Level II code for aortic aneurysm 6.0 cm or greater maximum diameter on centerline formatted ct or minor diameter on axial formatted ct. 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 G9599
- Long descriptor
- Aortic aneurysm 6.0 cm or greater maximum diameter on centerline formatted ct or minor diameter on axial formatted ct
- Short descriptor
- Aor ane >=6.0 cm max diam
- 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 G9599
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If G9599 is not quite right, the correct code is very often within a few positions of it.
- G9584Patient evaluated for risk of misuse of opiates by using a brief validated instrument (e.g., opioid risk tool, soapp-r) or patient interviewed at least once during opioid therapyterminated
- G9585Patient not evaluated for risk of misuse of opiates by using a brief validated instrument (e.g., opioid risk tool, soapp-r) or patient not interviewed at least once during opioid therapyterminated
- G9593Pediatric patient with minor blunt head trauma classified as low risk according to the pecarn prediction rules
- G9594Patient presented with a minor blunt head trauma and had a head ct ordered for trauma by an emergency care provider
- G9595Patient has documentation of ventricular shunt, brain tumor, or coagulopathy
- G9596Pediatric patient had a head ct for trauma ordered by someone other than an emergency care provider or was ordered for a reason other than traumaterminated
- G9597Pediatric patient with minor blunt head trauma not classified as low risk according to the pecarn prediction rules
- G9598Aortic aneurysm 5.5 - 5.9 cm maximum diameter on centerline formatted ct or minor diameter on axial formatted ct
- G9600Symptomatic aaas that required urgent/emergent (non-elective) repairterminated
- G9601Patient discharge to home no later than post-operative day #7terminated
- G9602Patient not discharged to home by post-operative day #7terminated
- G9603Patient survey score improved from baseline following treatment
- G9604Patient survey results not availableterminated
- G9605Patient survey score did not improve from baseline following treatment
- G9606Intraoperative cystoscopy performed to evaluate for lower tract injury
- G9607Documented 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
Questions about G9599
What is HCPCS code G9599?
G9599 is a HCPCS Level II code for aortic aneurysm 6.0 cm or greater maximum diameter on centerline formatted ct or minor diameter on axial formatted ct. It sits in the Procedures and Professional Services (Temporary) section.
Does Medicare cover G9599?
The CMS HCPCS file marks G9599 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 G9599 paid under the physician fee schedule?
G9599 carries PFS status code M. Measurement code. Used for reporting purposes only; never paid.