CPT code 58350: Tubal patency test2026 Medicare rate & RVUs in Guam
Chromotubation evaluates whether the fallopian tubes are open by observing dye passage during gynecologic surgery, commonly as part of an infertility evaluation.
Medicare pays $154.85 for 58350 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 58350 covers
A gynecologic surgeon performs chromotubation by introducing dye through the cervix and observing whether it passes through the fallopian tubes into the pelvis. It is commonly used during laparoscopy to assess tubal patency in an infertility workup or when tubal disease is being evaluated. The documented service is a dye-based patency assessment; it is not the transcervical catheter procedure used to attempt to reopen an obstructed tube.
Report 58350 when the operative record supports actual chromotubation, including the dye instillation and the observed tubal passage or lack of passage. When other procedures are performed in the same session, CMS applies the standard multiple-procedure reduction: the highest-valued procedure is paid in full and others at 50%. For bilateral reporting with modifier 50, payment is at 150%. The code has a 10-day global period, which includes related postoperative visits during that period. CMS does not pay an assistant at surgery; 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.
58350 in Hawaii, Guam
| Payment locality | Office | Facility |
|---|---|---|
| Hawaii, Guam | $154.85 | $87.25 |
How the 58350 rate is calculated
Each of 58350’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 · 58350
RVUs × geographic indexes × conversion factor
Work1.03
1.03 RVUs× 1.000 GPCI
Practice expense3.08
3.08 RVUs× 1.000 GPCI
Malpractice0.18
0.18 RVUs× 1.000 GPCI
Adjusted RVUs
4.2900
Conversion factor
$33.4009
Medicare rate
$143.29
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 58350
58350 has a 10-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 58350
Tubal patency test
| Rule | CMS value | What it means |
|---|---|---|
| Global period | 010 | Minor procedure: the day of the procedure plus 10 days after are included. |
| Multiple procedures | 2 | Standard reduction: highest-valued procedure at 100%, others at 50%. |
| Bilateral (modifier 50) | 1 | Bilateral with modifier 50 pays 150% of the fee schedule amount. |
| Assistant at surgery (80/81/82/AS) | 1 | Not paid (statutory restriction). |
| 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) | 0.10/0.80/0.10 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 58350
Tubal patency test
10-day global period ends
Oct 11, 2026
Covers Oct 1, 2026 through Oct 11, 2026 (11 days).
Visit on Oct 31, 2026
After the global period ends: visits and procedures are billed normally.
What modifiers do to the payment
Modifier 50 · payment effect
With and without the modifier
58350 without 50 · national office
$143.29
Tubal patency test
58350-50 · Bilateral: 150%
$214.94
Both sides on one line with modifier 50 are paid at 150% of the fee schedule amount (subject to multiple-procedure rules with other procedures).
58350 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 58345Tubal reopening
- Use 58350 for dye-based observation of tubal passage. Use 58345 for transcervical catheter introduction intended to diagnose or reestablish patency.
- 58340Uterine catheterization
- 58340 reports catheter placement for hysterosalpingography; 58350 reports dye passage observed during chromotubation, commonly at laparoscopy.
- 49320Diagnostic laparoscopy
- 49320 describes diagnostic laparoscopy of the abdomen. It does not by itself describe the dye-based tubal patency assessment reported by 58350.
58350 billing questions
Does 58350 reopen a blocked fallopian tube?
No. It reports dye-based assessment of tubal patency. Transcervical catheter introduction intended to diagnose or reestablish patency is described by 58345.
What documentation supports reporting 58350?
The operative note should identify dye instillation and the observed passage through the tubes, including whether patency was demonstrated. A statement that tubal patency was checked without documenting chromotubation is not enough to establish this service.
How does CMS handle 58350 with another procedure in the same session?
Under the standard multiple-procedure reduction, CMS pays the highest-valued procedure in full and the others at 50%. The operative record should identify the distinct procedures performed.
How is bilateral chromotubation reported?
CMS identifies 58350 as bilateral and pays modifier 50 at 150%. The record should support assessment of both tubes.
Can an assistant surgeon or co-surgeon be reported for 58350?
CMS does not pay an assistant at surgery for this code, and co-surgeons and team surgery are not permitted.
Are postoperative visits included?
Related postoperative visits during the 10-day global period are included in the procedure payment.
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 58350 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 →