Billing code 58558: HysteroscopyMedicare rate & RVUs in Guam
Report this service when a clinician uses hysteroscopy to sample the endometrium or remove an endometrial polyp, with or without curettage.
Medicare pays $1,411.84 for 58558 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 58558 covers
A gynecologist passes a hysteroscope through the cervix to inspect the uterine cavity and obtain endometrial tissue or remove a polyp under direct visualization. The procedure is commonly performed in an operating room or ambulatory surgery center for abnormal uterine bleeding, a suspected endometrial lesion, or a polyp identified on imaging or earlier evaluation. Tissue is typically sent for pathology. The code also covers curettage performed with the hysteroscopic service.
Choose this code when the operative hysteroscopy includes endometrial sampling or polypectomy, rather than diagnostic inspection alone or removal of a submucosal fibroid. Document the indication, hysteroscopic findings, tissue sampling or polyp removal, and any curettage performed. CMS assigns a 0-day global period, so same-day preoperative and postoperative care is included. When related endoscopies are performed together, endoscopy family pricing applies. Modifier 50 is inappropriate. Assistant-at-surgery services are not paid; co-surgeons are permitted, while team surgery is 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.
58558 in Hawaii, Guam
| Payment locality | Office | Facility |
|---|---|---|
| Hawaii, Guam | $1,411.84 | $200.38 |
How the 58558 rate is calculated
Each of 58558’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 · 58558
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 4.07Practice expense 33.23Malpractice 0.72
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 58558
The CMS indicators that decide how 58558 is paid alongside other services.
CMS payment indicators · 58558
Hysteroscopy
| 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 | 3 | Endoscopy family rules apply. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 1 | Not paid (statutory restriction). |
| Co-surgeons (62) | 2 | 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
58558 without 51 · national office
$1,269.90
Hysteroscopy
58558-51 · Second procedure: 50%
$634.95
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%).
58558 compared with similar codes
Compare codes
58558 vs 58555 vs 58561 vs 58100: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 58555Hysteroscopy
- Use 58555 for diagnostic hysteroscopy alone. Use 58558 when the hysteroscopy includes endometrial sampling or polyp removal.
- 58561Myoma removal
- Use 58561 for hysteroscopic removal of a submucosal fibroid. Code 58558 addresses endometrial sampling or polypectomy.
- 58100Endometrial biopsy
- Use 58100 for endometrial sampling without hysteroscopic visualization. Choose 58558 when sampling is performed through a hysteroscope.
58558 billing questions
When should I report this instead of diagnostic hysteroscopy?
Report 58558 when the hysteroscopy includes endometrial sampling or polyp removal. Diagnostic inspection alone is represented by 58555.
Can curettage be reported separately?
Curettage performed with this hysteroscopic service is included in the code. The descriptor covers the service with or without curettage.
Can I report a separate diagnostic hysteroscopy during the same session?
Do not report diagnostic hysteroscopy as a separate service when it is part of the operative hysteroscopy. CMS endoscopy family pricing applies when related endoscopies are performed together.
Should modifier 50 be used for bilateral findings?
No. CMS identifies bilateral adjustment as inappropriate for this code.
What should the operative note support?
Document the clinical indication, hysteroscopic findings, whether endometrial tissue was sampled or a polyp was removed, and any curettage performed.
Are assistant or co-surgeon services payable?
CMS does not pay an assistant at surgery for this service. Co-surgeons are permitted; team surgery is not.
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
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