Billing code 42507: Parotid duct diversionMedicare rate & RVUs in Nevada
Reports bilateral redirection of parotid saliva, typically as surgery to manage severe drooling when the operative plan diverts both parotid ducts.
CMS doesn’t publish an office rate for 42507 in Nevada.
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 42507 covers
This operation redirects saliva from both parotid ducts, which carry saliva from the parotid glands into the mouth. Otolaryngologists and other surgeons who treat salivary-duct disorders may perform it, including in patients with severe drooling for whom the treatment plan redirects salivary flow. The operative report should identify the ducts treated and describe the diversion performed; a repair that restores a damaged duct is a different service.
Report this code when the documented operation includes bilateral parotid duct diversion. CMS prices the code as bilateral, so modifier 50 does not increase payment. It has a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% multiple-procedure reduction. Assistant-at-surgery payment may be allowed; 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.
42507 in Nevada**
| Payment locality | Office | Facility |
|---|---|---|
| Nevada** | Unavailable | $436.80 |
How the 42507 rate is calculated
Each of 42507’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 · 42507
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 6.09Practice expense 6.24Malpractice 0.89
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 42507
42507 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 42507
Parotid duct diversion
| Rule | CMS value | What it means |
|---|---|---|
| Global period | 090 | Major surgery: the day before, the day of, and 90 days after are included. |
| Multiple procedures | 2 | Standard reduction: highest-valued procedure at 100%, others at 50%. |
| Bilateral (modifier 50) | 2 | Already bilateral by definition: paid once at 100%. |
| Assistant at surgery (80/81/82/AS) | 2 | Paid. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
| Split (54/55/56) | 0.09/0.81/0.10 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 42507
Parotid duct diversion
90-day global period ends
Dec 30, 2026
Covers Sep 30, 2026 through Dec 30, 2026 (92 days, including the day before surgery).
Visit on Oct 31, 2026
Day 30 of the 90-day post-op period: related follow-up care is included in the surgical payment.
Pre-op dayGlobal period
What modifiers do to the payment
Modifier 51 · payment effect
With and without the modifier
42507 without 51 · national facility
$441.56
Parotid duct diversion
42507-51 · Second procedure: 50%
$220.78
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%).
42507 compared with similar codes
Compare codes
42507 vs 42500 vs 42505 vs 42509 vs 42510: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 42500Duct repair
- 42500 is for simple repair of a salivary duct. Choose 42507 when the surgeon diverts both parotid ducts rather than repairing a duct.
- 42505Salivary duct repair
- 42505 is for complicated salivary duct repair. It does not describe redirecting both parotid ducts.
- 42509Parotid duct diversion
- Both codes concern parotid duct diversion. Compare the code descriptor with the operative report's documented procedure and laterality before selecting the code.
- 42510Parotid duct diversion
- This is another parotid duct diversion option. Select between the family codes using the operative details and the distinctions in their descriptors.
42507 billing questions
When should this code be selected instead of a parotid duct repair code?
Use this code for documented diversion of both parotid ducts. Codes 42500 and 42505 describe duct repair, not intentional redirection of salivary flow.
Should modifier 50 be appended?
No. CMS prices this code as bilateral, and modifier 50 does not increase payment.
What documentation supports reporting the bilateral service?
The operative report should identify treatment of both parotid ducts and describe the diversion performed. Documentation of only one duct does not support the bilateral service.
How does the 90-day global period affect postoperative reporting?
The day-before preoperative visit and 90 days of related postoperative care are included in the global period.
Can another procedure performed in the same session be separately paid?
Other procedures may be reported when independently supported, but CMS applies the standard multiple-procedure reduction: the highest-valued procedure is paid in full and others at 50%.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery payment may be allowed. Co-surgeons and team surgery are not permitted for this code.
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
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