HCPCS G0518: Implant replacementMedicare rate & RVUs in Guam
Reports removal of an existing subcutaneous drug-delivery implant and placement of a replacement implant during the same procedure.
Medicare pays $336.88 for G0518 in the office in Guam (Hawaii, Guam). Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
On this page 9 sections
What G0518 covers
G0518 covers a single procedure in which a clinician removes an existing non-biodegradable drug-delivery implant and inserts a replacement. A common setting is an office or outpatient procedure room, where a clinician accesses the subcutaneous implant site, removes the old implant, and places the new one. Subdermal contraceptive implants are a familiar example; the code describes the combined replacement service rather than removal or insertion alone.
Report G0518 when both removal and reinsertion occur in the same procedure. The record should support the existing implant’s removal, the new implant’s placement, and the treated site. CMS assigns a 0-day global period, so same-day preoperative and postoperative care is included. When multiple procedures occur in the same session, the highest-valued procedure is paid in full and other procedures are subject to the standard multiple-procedure reduction. Modifier 50 is inappropriate. Assistant-at-surgery payment requires documented medical necessity; co-surgeons and team surgery are not permitted.
This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.
G0518 in Hawaii, Guam
| Payment locality | Office | Facility |
|---|---|---|
| Hawaii, Guam | $336.88 | $158.39 |
How the G0518 rate is calculated
Each of G0518’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.
How the rate is built · G0518
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 3.46Practice expense 5.68Malpractice 0.29
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for G0518
The CMS indicators that decide how G0518 is paid alongside other services.
CMS payment indicators · G0518
Implant replacement
| Rule | CMS value | What it means |
|---|---|---|
| Global period | 000 | Same-day global: pre- and post-op care on the day of the procedure is included. |
| Multiple procedures | 2 | Standard reduction: highest-valued procedure at 100%, others at 50%. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
What modifiers do to the payment
Modifier 51 · payment effect
With and without the modifier
G0518 without 51 · national office
$314.97
Implant replacement
G0518-51 · Second procedure: 50%
$157.49
When this isn’t the highest-valued procedure in the session, Medicare pays 50% of its fee schedule amount (the highest is paid at 100%).
G0518 compared with similar codes
Compare codes
G0518 vs G0517 vs G0516 vs 11983: national Medicare rates
Swap in your local Medicare rate.
How to choose
- G0517Implant removal
- G0517 describes removal without replacement. G0518 applies when the clinician removes the existing implant and inserts a new one during the same procedure.
- G0516Drug implant insertion
- G0516 is for insertion without removal and specifies four or more rods. G0518 is the combined removal-and-reinsertion service.
- 11983Drug implant
- billing code 11983 also describes removal with reinsertion of a non-biodegradable drug-delivery implant. Confirm which code applies under the claim’s coding and payer rules rather than reporting both for the same service.
G0518 billing questions
When should G0518 be reported instead of a removal-only code?
G0518 represents the combined removal-and-reinsertion procedure. Do not unbundle its two steps as separate removal-only and insertion-only services for that same replacement.
What documentation supports G0518?
Document removal of the existing implant, placement of the replacement, and the treated site. The record should make clear that both parts occurred during the procedure.
Does the 0-day global period include same-day care?
Yes. Same-day preoperative and postoperative care is included in the procedure’s 0-day global period.
How are other procedures in the same session paid?
Under the standard multiple-procedure rule, the highest-valued procedure is paid in full and other procedures are subject to a 50% reduction. Modifier 50 is inappropriate for G0518.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery payment requires documentation of medical necessity. Co-surgeons and team surgery are not permitted.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.
CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027
Show the CMS file lines behind this rate
Fee sheets
Put G0518 and the rest of your codes on one sheet
Build a fee sheet from your own code list at your locality, put your payer contracts beside Medicare, and see what changed each quarter.
Build my fee sheetOr price your code list free →