CPT code 93986: Access mapping, complete unilateral study2026 Medicare rate & RVUs in Guam
Reports a complete unilateral duplex mapping of arteries and veins to assess vessel suitability before creation of a hemodialysis access.
CMS doesn’t publish an office rate for 93986 in Guam.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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What 93986 covers
Before hemodialysis access creation, duplex mapping surveys arterial inflow and venous outflow vessels in one extremity to help identify suitable anatomy. A vascular laboratory or imaging department typically performs the ultrasound, with a qualified practitioner interpreting the findings. This study evaluates vessels for access planning rather than an existing fistula or graft.
Select 93986 for a complete unilateral study and 93985 for a complete bilateral study. Documentation should identify the side and describe the vessels evaluated and relevant findings for access planning. The service has professional and technical components: modifier 26 identifies interpretation only, modifier TC identifies the technical service, and reporting without either modifier represents the global service. The cardiovascular diagnostic multiple procedure reduction applies to the technical component.
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.
93986 in Hawaii, Guam, HI
| Payment locality | Office | Facility |
|---|---|---|
| Hawaii, Guam, HI | Unavailable | Unavailable |
How the 93986 rate is calculated
Each of 93986’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 · 93986
RVUs × geographic indexes × conversion factor
Work0.49
0.49 RVUs× 1.000 GPCI
Practice expense3.85
3.85 RVUs× 1.000 GPCI
Malpractice0.10
0.10 RVUs× 1.000 GPCI
Adjusted RVUs
4.4400
Conversion factor
$33.4009
Medicare rate
$148.30
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 93986
The CMS indicators that decide how 93986 is paid alongside other services.
CMS payment indicators · 93986
Access mapping, complete unilateral study
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 6 | Diagnostic cardiovascular reduction applies to the technical component. |
| 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 | 1 | Diagnostic test with separate professional (26) and technical (TC) components. |
What modifiers do to the payment
Modifier 26 · payment effect
With and without the modifier
93986 without 26 · national office
$148.30
Access mapping, complete unilateral study
93986-26 · Professional component
$23.05
Pays only the interpretation and report.
93986 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 93985Dialysis access mappingComplete bilateral study
- Choose 93986 for complete unilateral access mapping; choose 93985 when the complete mapping is bilateral.
- 93990Dialysis access scanExisting access evaluation
- 93986 maps vessels for access planning before creation. Code 93990 evaluates an established hemodialysis access.
- 93931Arterial duplexUnilateral or limited study
- 93931 is a unilateral upper-extremity arterial duplex. Use 93986 for complete access mapping that evaluates vessels for hemodialysis access planning.
93986 billing questions
When should 93986 be used instead of 93985?
Use 93986 for complete mapping on one side. Use 93985 when the complete mapping is bilateral.
How does 93986 differ from 93990?
93986 is complete vessel mapping for hemodialysis access planning. Code 93990 is used to evaluate an established hemodialysis access.
Which modifier identifies interpretation-only billing?
Append modifier 26 for the professional interpretation. Modifier TC identifies the technical service; billing without either modifier represents the global service.
Does the multiple procedure reduction affect both components?
The cardiovascular diagnostic multiple procedure reduction applies to the technical component of this service.
What should the report document?
Document the side, vessels evaluated, and findings relevant to determining vessel suitability for hemodialysis access creation.
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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