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Billing code 93985: Dialysis access mappingMedicare rate & RVUs

Bilateral duplex mapping evaluates arterial inflow and venous pathways to help plan hemodialysis access creation in a patient needing vascular access.

CMS RVU26DEffective Oct 1, 2026109 payment localities17.7K Medicare services in 2024

Medicare pays $249.17 for 93985 nationally in the office. Local office rates run $215.76–$345.51.

Medicare rate · 93985

Dialysis access mapping

Work RVUs
0.78
Total RVUs
7.46
Global days
XXX

National rate · 2026

$249.17

Office setting, before claim adjustments.

See every locality for 93985 →Billed by an NP, PA or therapist? →

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 10 sections
  1. Medicare rate
  2. What 93985 covers
  3. By payment locality
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Similar codes
  8. Related codes
  9. Billing questions
  10. Sources

What 93985 covers

This duplex ultrasound maps vessels relevant to hemodialysis access on both sides, assessing arterial inflow and the veins and access-related anatomy needed for planning. A vascular sonographer typically acquires the images in a vascular laboratory or imaging department; a qualified physician, such as a radiologist or vascular specialist, interprets the study. It is commonly performed before choosing a site for a dialysis fistula or graft.

Report 93985 for a complete bilateral mapping examination, supported by documentation of the clinical need and the vessels and sides examined. The code is already priced as bilateral, so modifier 50 does not increase payment. The global service is billed without a component modifier; modifier 26 identifies the interpretation, and modifier TC identifies the technical service. When multiple cardiovascular diagnostic procedures are performed, the 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.

Where 93985 pays more and less

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 payment localities

$215.76 to $345.51

$215.76$280.63$345.51
One dot per payment locality, office / nonfacility. Hover a dot to see the locality; select it to open that rate.

109 of 109 payment localities

93985 office and facility rates by payment locality
Payment localityOfficeFacility
Alabama$219.53Unavailable
Alaska*$273.78Unavailable
Arizona$241.61Unavailable
Arkansas$215.76Unavailable
Atlanta$253.87Unavailable
Austin$261.19Unavailable
Bakersfield$268.32Unavailable
Baltimore/Surr. Cntys$266.81Unavailable
Beaumont$229.20Unavailable
Brazoria$246.17Unavailable

93985 rates by state

Office rate range in each state. Select a state to see its payment localities.

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

Explore a state

Local rates. Clear comparisons.

Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.

$215.76

$306.68

Color shows the midpoint of each state’s locality range.

View every state and territory as a table
93985 office rate range by state
State / territoryOffice rate rangeLocalities
AK$273.781
AL$219.531
AR$215.761
AZ$241.611
CA$267.85–$345.5129
CO$262.161
CT$267.631
DC$289.921
DE$246.121
FL$242.46–$266.773
GA$226.78–$253.872
GU$276.571
HI$276.571
IA$227.261
ID$228.781
IL$233.45–$259.614
IN$230.381
KS$225.481
KY$224.551
LA$223.93–$237.112
MA$259.96–$291.802
MD$251.57–$289.923
ME$229.63–$245.122
MI$230.99–$245.462
MN$251.481
MO$219.02–$238.743
MS$217.461
MT$249.161
NC$232.551
ND$245.801
NE$228.901
NH$257.381
NJ$270.77–$285.992
NM$232.261
NV$248.441
NY$236.61–$296.805
OH$230.301
OK$224.641
OR$246.61–$272.272
PA$231.03–$259.652
PR$251.481
RI$256.231
SC$231.791
SD$245.401
TN$226.751
TX$229.20–$261.198
UT$235.551
VA$243.80–$289.922
VI$251.481
VT$244.191
WA$259.68–$298.792
WI$236.111
WV$223.131
WY$247.691

How the 93985 rate is calculated

Each of 93985’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 · 93985

RVUs × geographic indexes × conversion factor

Work0.78

0.78 RVUs× 1.000 GPCI

Practice expense6.51

6.51 RVUs× 1.000 GPCI

Malpractice0.17

0.17 RVUs× 1.000 GPCI

Adjusted RVUs

7.4600

Conversion factor

$33.4009

Medicare rate

$249.17

Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.

Payment rules and modifiers for 93985

The CMS indicators that decide how 93985 is paid alongside other services.

CMS payment indicators · 93985

Dialysis access mapping

RuleCMS valueWhat it means
Global periodXXXThe global surgery concept doesn’t apply.
Multiple procedures6Diagnostic cardiovascular reduction applies to the technical component.
Bilateral (modifier 50)2Already bilateral by definition: paid once at 100%.
Assistant at surgery (80/81/82/AS)0Not paid without supporting documentation.
Co-surgeons (62)0Not permitted.
Team surgery (66)0Not permitted.
Professional/technical1Diagnostic test with separate professional (26) and technical (TC) components.

What modifiers do to the payment

Modifier 26 · payment effect

With and without the modifier

93985 without 26 · national office

$249.17

Dialysis access mapping

93985-26 · Professional component

$37.07

Pays only the interpretation and report.

When to use modifier 26

93985 compared with similar codes

Compare codes · National

5 codes, side by side

  • 93985

    Dialysis access mapping0.78 wRVU

    $249.17

  • 93986

    Not on the physician fee schedule0.49 wRVU

    $148.30−$100.87

  • 93990

    Not on the physician fee schedule0.49 wRVU

    $144.29−$104.88

  • 93930

    Arm arterial duplex0.78 wRVU

    $198.74−$50.43

  • 93970

    Venous duplex scan0.68 wRVU

    $184.04−$65.13

How to choose

93986Dup-scan hemo compl uni std
93985 is the complete bilateral mapping study; 93986 is the complete unilateral study.
93990Doppler flow testing
Use 93985 for vessel mapping to plan hemodialysis access. Code 93990 is for evaluation of an existing access.
93930Arm arterial duplex
93930 is a bilateral upper-extremity arterial duplex. Choose 93985 when the service is complete hemodialysis-access mapping that includes arterial inflow and venous pathways.
93970Venous duplex scan
93970 is a bilateral extremity venous duplex. Choose 93985 for the complete hemodialysis-access mapping examination, not an isolated venous study.

Codes related to 93985

Related codes aren’t interchangeable: bill the code that matches the service performed.

Codes related to 93985
CodeHow it relatesNational office range
Same family
93986Dup-scan hemo compl uni stdComplete unilateral hemodialysis-access mapping; 93985 represents the bilateral study.No office rate
Used instead
93930Arm arterial duplexBilateral upper-extremity arterial duplex for an arterial question rather than complete access mapping.$173.24–$274.90
93970Venous duplex scanBilateral extremity venous duplex for a venous question rather than complete access mapping.$160.26–$255.12
93990Doppler flow testingEvaluates an existing hemodialysis access, unlike pre-access vessel mapping.No office rate

93985 billing questions

When should 93985 be selected instead of 93986?

Use 93985 for a complete bilateral hemodialysis-access mapping study. Use 93986 when the complete study is unilateral.

Does 93985 include both arms?

Yes. The code is priced as bilateral, and modifier 50 does not increase payment.

Can the professional and technical services be billed separately?

Yes. Modifier 26 identifies the physician interpretation, and modifier TC identifies the equipment and staff service. Without either modifier, the claim represents the global service.

Does the multiple procedure reduction affect the entire service?

For multiple cardiovascular diagnostic procedures, the reduction applies to the technical component of 93985.

How is 93985 different from 93990?

93985 maps vessels for hemodialysis access planning. Code 93990 evaluates an existing hemodialysis access rather than providing the complete bilateral planning study.

What documentation supports reporting 93985?

Document the access-planning indication, bilateral examination, and the vessels assessed. The record should support that the study was a complete mapping examination.

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
RVUs for 93985PPRRVU2026_Oct_nonQPP.csv, line 12,350 (RVU26D)

Open CMS sourceHow we calculate rates

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