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CPT code 73580: Knee arthrography, radiographic contrast study2026 Medicare rate & RVUs in Iowa

Reports radiographic imaging and interpretation of a contrast study of the knee joint, typically performed after contrast is introduced into the joint.

CMS RVU26DEffective Oct 1, 2026One payment locality12.7K Medicare services in 2024

In Iowa, Medicare pays $107.53 for 73580 in the office.

$107.53Office (non-facility)
Not available in this settingHospital or facility
−8.3%vs the national office rate ($117.24)

Check a contract rate as a % of Medicare · 73580 nationwide

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

We’ll open 73580 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Iowa
  2. What 73580 covers
  3. Compared with other areas
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Related codes
  8. Rate history
  9. Where it applies
  10. Billing questions
  11. Sources

What 73580 covers

This service covers radiographic imaging and interpretation of a knee arthrogram: contrast is introduced into the joint, and images are obtained to assess its internal structures. A radiologist typically interprets the study; imaging staff acquire the images, and a physician may perform the joint injection. It is distinct from routine knee x-rays without intra-articular contrast and from an MRI arthrogram.

Report 73580 for the radiographic arthrogram service, supported by documentation identifying the knee, the contrast study, the images obtained, and the interpretation. The contrast injection is commonly reported separately with 27370. CMS prices the professional interpretation with modifier 26 and the equipment-and-staff service with modifier TC; billing without either modifier represents the global service. When both knees are examined, CMS pays each side separately at 100%.

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.

How Iowa compares for 73580

Across 109 of 109 payment localities, the office rate for 73580 runs from $102.52 in Arkansas to $160.20 in San Benito County, CA. Iowa pays $107.53. The RVUs are the same everywhere; the geographic indexes change the dollars.

73580 in Iowa vs other payment areas
  1. Iowa · this page$107.53
  2. Los Angeles, CA · California$134.55+$27.02
  3. Washington, DC area · District of Columbia$135.53+$28.00
  4. Miami, FL · Florida$125.23+$17.70
  5. Chicago, IL · Illinois$121.31+$13.78
  6. Manhattan, NY · New York$135.46+$27.93
  7. Alaska · Alaska$131.91+$24.38

Other areas in Iowa first, then benchmark localities. Bars start at $0.

Every other payment area

73580 in every other Medicare payment locality
Payment localityOfficeFacility
AlabamaAlabama$104.18—
ArkansasArkansas$102.52—
ArizonaArizona$113.90—
Bakersfield, CACalifornia$125.70—
Chico, CACalifornia$125.47—
El Centro, CACalifornia$125.48—
Fresno, CACalifornia$125.47—
Hanford, CACalifornia$125.47—

73580 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.

$102.52

$142.83

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

View every state and territory as a table
73580 office rate range by state
State / territoryOffice rate rangeLocalities
AK$131.911
AL$104.181
AR$102.521
AZ$113.901
CA$125.47–$160.2029
CO$122.981
CT$125.521
DC$135.531
DE$115.921
FL$114.39–$125.233
GA$107.47–$119.362
GU$129.151
HI$129.151
IA$107.531
ID$108.211
IL$110.46–$122.014
IN$108.911
KS$106.771
KY$106.441
LA$106.18–$111.982
MA$122.05–$136.202
MD$118.35–$135.533
ME$108.61–$115.392
MI$109.30–$115.742
MN$118.121
MO$104.03–$112.673
MS$103.311
MT$117.231
NC$109.891
ND$115.651
NE$108.251
NH$120.811
NJ$127.03–$133.872
NM$109.871
NV$116.891
NY$111.68–$138.765
OH$108.981
OK$106.461
OR$116.06–$127.432
PA$109.28–$122.002
PR$118.241
RI$120.461
SC$109.601
SD$115.461
TN$107.341
TX$108.48–$122.498
UT$111.251
VA$114.83–$135.532
VI$118.241
VT$114.971
WA$121.90–$139.332
WI$111.391
WV$105.921
WY$116.541

See 73580 in every payment locality

How the 73580 rate is calculated

Each of 73580’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 · 73580

RVUs × geographic indexes × conversion factor

Office or facility?

Work0.58

0.58 RVUs× 1.000 GPCI

Practice expense2.85

2.85 RVUs× 1.000 GPCI

Malpractice0.08

0.08 RVUs× 1.000 GPCI

Adjusted RVUs

3.5100

Conversion factor

$33.4009

Medicare rate

$117.24

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

The exact Iowa inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

8,225

Code
73580
Physician work
0.58
Practice expense
2.85
Malpractice
0.08

GPCI2026.csv

53

Locality
Iowa
Physician work
1.000
Practice expense
0.915
Malpractice
0.397
Office calculation for 73580 in Iowa
ComponentRVULocality factorAdjusted
Physician work0.58× 1.0000.5800
Practice expense2.85× 0.9152.6078
Malpractice0.08× 0.3970.0318
Total RVUs3.2195
Conversion factor× 33.4009

Office rate, Iowa$107.53

Office: (0.58 × 1 + 2.85 × 0.915 + 0.08 × 0.397) × $33.4009 = $107.53

Open 73580 in the RVU calculator

Payment rules and modifiers for 73580

The CMS indicators that decide how 73580 is paid alongside other services.

CMS payment indicators · 73580

Knee arthrography, radiographic contrast study

RuleCMS valueWhat it means
Global periodXXXThe global surgery concept doesn’t apply.
Multiple procedures0No multiple-procedure reduction.
Bilateral (modifier 50)3Each side paid at 100% (no 150% cap).
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

73580 without 26 · national office

$117.24

Knee arthrography, radiographic contrast study

73580-26 · Professional component

$31.73

Pays only the interpretation and report.

When to use modifier 26

Codes related to 73580

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

Codes related to 73580
CodeHow it relatesOffice range, Iowa
Used instead
73560Knee X-ray, one or two viewsRoutine noncontrast knee radiographs with one or two views.$31.59
73562Knee X-ray, three views, one kneeRoutine noncontrast knee radiographs with three views.$38.98
73564Knee X-ray, four or more views, one kneeRoutine noncontrast knee radiographs with four or more views.$45.48

How 73580 has changed in Iowa

73580 · Office / nonfacility

$107.53

Effective 2026-10-01

The base rate is $11.51 higher than on 2025-10-01, moving from $96.02 to $107.53 (12.0%).

It is unchanged from the immediately preceding available release, effective 2026-07-01.

Base rate by release · bars start at $0 · select a bar to compare

One bar per available release, ordered by effective date. Missing rates remain gaps. These comparisons hold the code, setting and locality identifiers constant; they do not isolate which policy or input caused a change.

What changed, release by release

  1. January 1, 2026

    RVU26A

    $96.02changed to$107.53

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 0.59 changed to 0.58
    • Practice expense RVU 2.57 changed to 2.85
    • Malpractice RVU 0.07 changed to 0.08
    • Practice expense GPCI 0.913 changed to 0.915
    • Malpractice GPCI 0.457 changed to 0.397

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $101.55changed to$96.02

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 2.66 changed to 2.57

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $99.89changed to$101.55

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $119.10changed to$99.89

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 3.18 changed to 2.66
    • Practice expense GPCI 0.910 changed to 0.913
    • Malpractice GPCI 0.441 changed to 0.457

  5. January 1, 2023

    RVU23A

    $140.71changed to$119.10

    • Conversion factor 34.6062 changed to 33.8872
    • Work RVU 0.54 changed to 0.59
    • Practice expense RVU 3.85 changed to 3.18
    • Malpractice RVU 0.08 changed to 0.07
    • Practice expense GPCI 0.907 changed to 0.910
    • Malpractice GPCI 0.425 changed to 0.441

    Held through RVU23B, RVU23C, RVU23D.

  6. January 1, 2022

    RVU22A

    $136.20changed to$140.71

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 3.68 changed to 3.85
    • Malpractice RVU 0.06 changed to 0.08

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $126.46changed to$136.20

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 3.24 changed to 3.68
    • Malpractice GPCI 0.424 changed to 0.425

    Held through RVU21B, RVU21C, RVU21D.

  8. January 1, 2020

    RVU20A

    $118.11changed to$126.46

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 2.99 changed to 3.24
    • Malpractice GPCI 0.423 changed to 0.424

    Held through RVU20B, RVU20C, RVU20D.

  9. January 1, 2019

    RVU19A

    $108.84changed to$118.11

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 2.71 changed to 2.99

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $105.02changed to$108.84

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 2.62 changed to 2.71
    • Malpractice RVU 0.05 changed to 0.06
    • Practice expense GPCI 0.902 changed to 0.907
    • Malpractice GPCI 0.458 changed to 0.423

    Held through RVU18B, RVU18C, RVU18D.

  11. January 1, 2017

    RVU17A

    $105.23changed to$105.02

    • Conversion factor 35.8043 changed to 35.8887
    • Practice expense RVU 2.65 changed to 2.62
    • Practice expense GPCI 0.896 changed to 0.902
    • Malpractice GPCI 0.493 changed to 0.458

    Held through RVU17B, RVU17C, RVU17D.

  12. January 1, 2016

    RVU16A

    $105.11changed to$105.23

    • Conversion factor 35.9335 changed to 35.8043
    • Practice expense RVU 2.64 changed to 2.65
    • Malpractice RVU 0.04 changed to 0.05

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $104.59changed to$105.11

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $116.55changed to$104.59

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 3.01 changed to 2.64
    • Malpractice RVU 0.06 changed to 0.04
    • Practice expense GPCI 0.892 changed to 0.896
    • Malpractice GPCI 0.475 changed to 0.493

    Held through RVU15B.

  15. January 1, 2014

    RVU14A

    $121.00changed to$116.55

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 3.37 changed to 3.01
    • Practice expense GPCI 0.887 changed to 0.892
    • Malpractice GPCI 0.456 changed to 0.475

    Held through RVU14B, RVU14C, RVU14D.

  16. January 1, 2013

    RVU13AR

    Earliest loaded release: $121.00

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$107.53Not available in this settingRVU26D
2026-07-01$107.53Not available in this settingRVU26C
2026-04-01$107.53Not available in this settingRVU26B
2026-01-01$107.53Not available in this settingRVU26A
2025-10-01$96.02Not available in this settingRVU25D
2025-07-01$96.02Not available in this settingRVU25C
2025-04-01$96.02Not available in this settingRVU25B
2025-01-01$96.02Not available in this settingRVU25A
2024-10-01$101.55Not available in this settingRVU24D
2024-07-01$101.55Not available in this settingRVU24C
2024-04-01$101.55Not available in this settingRVU24B
2024-03-09$101.55Not available in this settingRVU24AR
2024-01-01$99.89Not available in this settingRVU24A
2023-10-01$119.10Not available in this settingRVU23D
2023-07-01$119.10Not available in this settingRVU23C
2023-04-01$119.10Not available in this settingRVU23B
2023-01-01$119.10Not available in this settingRVU23A
2022-10-01$140.71Not available in this settingRVU22D
2022-07-01$140.71Not available in this settingRVU22C
2022-04-01$140.71Not available in this settingRVU22B
2022-01-01$140.71Not available in this settingRVU22A
2021-10-01$136.20Not available in this settingRVU21D
2021-07-01$136.20Not available in this settingRVU21C
2021-04-01$136.20Not available in this settingRVU21B
2021-01-01$136.20Not available in this settingRVU21A
2020-10-01$126.46Not available in this settingRVU20D
2020-07-01$126.46Not available in this settingRVU20C
2020-04-01$126.46Not available in this settingRVU20B
2020-01-01$126.46Not available in this settingRVU20A
2019-10-01$118.11Not available in this settingRVU19D
2019-07-01$118.11Not available in this settingRVU19C
2019-04-01$118.11Not available in this settingRVU19B
2019-01-01$118.11Not available in this settingRVU19A
2018-10-01$108.84Not available in this settingRVU18D
2018-07-01$108.84Not available in this settingRVU18C
2018-04-01$108.84Not available in this settingRVU18B
2018-01-01$108.84Not available in this settingRVU18AR1
2017-10-01$105.02Not available in this settingRVU17D
2017-07-01$105.02Not available in this settingRVU17C
2017-04-01$105.02Not available in this settingRVU17B
2017-01-01$105.02Not available in this settingRVU17A
2016-10-01$105.23Not available in this settingRVU16D
2016-07-01$105.23Not available in this settingRVU16C
2016-04-01$105.23Not available in this settingRVU16B
2016-01-01$105.23Not available in this settingRVU16A
2015-10-01$105.11Not available in this settingRVU15D
2015-07-01$105.11Not available in this settingRVU15C
2015-04-01$104.59Not available in this settingRVU15B
2015-01-01$104.59Not available in this settingRVU15A
2014-10-01$116.55Not available in this settingRVU14D
2014-07-01$116.55Not available in this settingRVU14C
2014-04-01$116.55Not available in this settingRVU14B
2014-01-01$116.55Not available in this settingRVU14A
2013-10-01$121.00Not available in this settingRVU13D
2013-07-01$121.00Not available in this settingRVU13C
2013-04-01$121.00Not available in this settingRVU13B
2013-01-01$121.00Not available in this settingRVU13AR

Price 73580 for an earlier date of service

Where the Iowa rate applies

Iowa is a Medicare payment area, not a city. Our Census mapping connects it to 1026 cities and communities in Iowa. Some span more than one payment area; confirm with the service ZIP.

  • Ackley
  • Ackworth
  • Adair
  • Adel
  • Afton
  • Agency
  • Ainsworth
  • Akron

Browse all communities in Iowa

73580 billing questions

How does 73580 differ from routine knee x-rays?

73580 is for radiographic imaging and interpretation of a knee arthrogram using contrast introduced into the joint. Routine knee x-ray codes describe noncontrast examinations and are selected by the number of views.

Is the contrast injection included in 73580?

The injection is commonly reported separately with 27370. Keep documentation clear about the injection and the radiographic arthrogram service.

When should modifier 26 or TC be used?

Use modifier 26 for the professional interpretation and modifier TC for the technical service, including equipment and staff. Without either modifier, 73580 represents the global service.

How is bilateral knee arthrography paid?

CMS pays each side separately at 100% when both knees are examined. Document which knee was studied and report the services for each side.

What documentation supports 73580?

The record should identify the knee, document that the examination used intra-articular contrast, and support the radiographic imaging and interpretation. The report should reflect the arthrogram findings.

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 73580PPRRVU2026_Oct_nonQPP.csv, line 8,225 (RVU26D)
Geographic factors for IowaGPCI2026.csv, line 53 (RVU26D)

Open CMS sourceHow we calculate rates

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