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CPT code 29870: Knee arthroscopy, diagnostic, with or without biopsy2026 Medicare rate & RVUs in New Mexico

Reports arthroscopic inspection of the knee for diagnostic purposes, including an optional synovial biopsy when tissue sampling is part of the evaluation.

CMS RVU26DEffective Oct 1, 2026One payment locality352 Medicare services in 2024

In New Mexico, Medicare pays $576.64 for 29870 in the office and $390.42 when it’s performed in a hospital or facility.

$576.64Office (non-facility)
$390.42Hospital or facility
−4.4%vs the national office rate ($602.89)

Check a contract rate as a % of Medicare · 29870 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 29870 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in New Mexico
  2. What 29870 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 29870 covers

The orthopedic surgeon examines the knee joint through an arthroscope to evaluate an unresolved problem, such as persistent pain or suspected intra-articular disease. The surgeon may also take a synovial tissue sample for laboratory examination. This service is typically performed in an operating room or ambulatory surgery setting when imaging, examination, or other evaluation has not established the diagnosis.

Select this code when the arthroscopy is diagnostic, with or without synovial biopsy, rather than a therapeutic arthroscopic procedure. The operative report should support the diagnostic purpose, document the areas examined and findings, and describe any biopsy. CMS assigns a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. For multiple procedures in one session, the highest-valued procedure is paid in full and others at 50%. Bilateral reporting with modifier 50 is paid at 150%. Assistant-at-surgery payment is restricted; co-surgeons are paid only with supporting documentation, and 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.

How New Mexico compares for 29870

Across 109 of 109 payment localities, the office rate for 29870 runs from $529.87 in Arkansas to $782.08 in San Benito County, CA. New Mexico pays $576.64. The RVUs are the same everywhere; the geographic indexes change the dollars.

29870 in New Mexico vs other payment areas
  1. New Mexico · this page$576.64
  2. Los Angeles, CA · California$671.36+$94.72
  3. Washington, DC area · District of Columbia$687.01+$110.37
  4. Miami, FL · Florida$671.87+$95.23
  5. Chicago, IL · Illinois$650.62+$73.98
  6. Manhattan, NY · New York$698.58+$121.94
  7. Alaska · Alaska$697.91+$121.27

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

Every other payment area

29870 in every other Medicare payment locality
Payment localityOfficeFacility
AlabamaAlabama$538.02$360.33
ArkansasArkansas$529.87$355.43
ArizonaArizona$585.55$388.77
Bakersfield, CACalifornia$631.00$408.42
Chico, CACalifornia$628.15$405.57
El Centro, CACalifornia$628.32$405.75
Fresno, CACalifornia$628.15$405.57
Hanford, CACalifornia$628.15$405.57

29870 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.

$529.87

$705.12

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

View every state and territory as a table
29870 office rate range by state
State / territoryOffice rate rangeLocalities
AK$697.911
AL$538.021
AR$529.871
AZ$585.551
CA$628.15–$782.0829
CO$622.951
CT$644.251
DC$687.011
DE$595.461
FL$602.61–$671.873
GA$566.35–$616.702
GU$643.131
HI$643.131
IA$548.191
ID$552.801
IL$587.50–$650.624
IN$556.041
KS$547.471
KY$555.621
LA$555.50–$584.002
MA$619.78–$683.532
MD$606.55–$687.013
ME$557.92–$586.602
MI$572.57–$612.512
MN$590.251
MO$546.86–$583.783
MS$538.381
MT$602.821
NC$563.701
ND$582.451
NE$550.731
NH$614.961
NJ$649.74–$679.792
NM$576.641
NV$597.541
NY$572.69–$718.695
OH$568.411
OK$552.471
OR$591.07–$641.122
PA$568.24–$628.952
PR$606.761
RI$615.561
SC$567.371
SD$580.041
TN$550.611
TX$564.49–$622.478
UT$575.411
VA$585.98–$687.012
VI$606.761
VT$581.901
WA$618.03–$695.722
WI$562.301
WV$565.381
WY$593.941

See 29870 in every payment locality

How the 29870 rate is calculated

Each of 29870’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 · 29870

RVUs × geographic indexes × conversion factor

Office or facility?

Work5.06

5.06 RVUs× 1.000 GPCI

Practice expense11.96

11.96 RVUs× 1.000 GPCI

Malpractice1.03

1.03 RVUs× 1.000 GPCI

Adjusted RVUs

18.0500

Conversion factor

$33.4009

Medicare rate

$602.89

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

The exact New Mexico inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

3,353

Code
29870
Physician work
5.06
Practice expense
11.96
Malpractice
1.03

GPCI2026.csv

77

Locality
New Mexico
Physician work
1.000
Practice expense
0.917
Malpractice
1.201
Office calculation for 29870 in New Mexico
ComponentRVULocality factorAdjusted
Physician work5.06× 1.0005.0600
Practice expense11.96× 0.91710.9673
Malpractice1.03× 1.2011.2370
Total RVUs17.2644
Conversion factor× 33.4009

Office rate, New Mexico$576.64

Office: (5.06 × 1 + 11.96 × 0.917 + 1.03 × 1.201) × $33.4009 = $576.64

Facility: (5.06 × 1 + 5.88 × 0.917 + 1.03 × 1.201) × $33.4009 = $390.42

Open 29870 in the RVU calculator

Payment rules and modifiers for 29870

29870 has a 90-day global period: related visits in that window are included in the surgery payment.

CMS payment indicators · 29870

Knee arthroscopy, diagnostic, with or without biopsy

RuleCMS valueWhat it means
Global period090Major surgery: the day before, the day of, and 90 days after are included.
Multiple procedures2Standard reduction: highest-valued procedure at 100%, others at 50%.
Bilateral (modifier 50)1Bilateral with modifier 50 pays 150% of the fee schedule amount.
Assistant at surgery (80/81/82/AS)1Not paid (statutory restriction).
Co-surgeons (62)1Permitted with supporting documentation.
Team surgery (66)0Not permitted.
Professional/technical0Physician service: no professional/technical split.
Split (54/55/56)0.10/0.69/0.21Share of the payment for pre-op, the procedure itself, and post-op care.

Global surgery period · 29870

Knee arthroscopy, diagnostic, with or without biopsy

90-day global period ends

Dec 30, 2026

Covers Sep 30, 2026 through Dec 30, 2026 (92 days, including the day before surgery).

Visit on Oct 31, 2026

Day 30 of the 90-day post-op period: related follow-up care is included in the surgical payment.

  • 24Unrelated E/M visit by the same physician
  • 79Unrelated procedure (starts its own global period)
  • 58Staged, more extensive, or therapy procedure that was planned
  • 78Unplanned return to the operating room for a related complication
SurgeryVisit
Sep 23, 2026Jan 10, 2027

Pre-op dayGlobal period

What modifiers do to the payment

Modifier 50 · payment effect

With and without the modifier

29870 without 50 · national office

$602.89

Knee arthroscopy, diagnostic, with or without biopsy

29870-50 · Bilateral: 150%

$904.34

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).

When to use modifier 50

Codes related to 29870

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

Codes related to 29870
CodeHow it relatesOffice range, New Mexico
Used instead
29871Knee arthroscopy, infection lavage and drainageUsed when knee arthroscopy treats infection rather than serving as diagnostic inspection.No office rate
29875Knee synovectomy, limited arthroscopic excisionReports limited synovectomy when synovial tissue is surgically removed, not merely sampled.No office rate
29876Knee synovectomy, two or more compartmentsReports major synovectomy when extensive synovial removal is performed.No office rate
29881Knee meniscectomy, medial or lateral meniscusReports arthroscopic meniscectomy of one compartment when that therapeutic procedure is performed.No office rate

How 29870 has changed in New Mexico

29870 · Office / nonfacility

$576.64

Effective 2026-10-01

The base rate is $54.44 higher than on 2025-10-01, moving from $522.20 to $576.64 (10.4%).

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

    $522.20changed to$576.64

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 5.19 changed to 5.06
    • Practice expense RVU 10.76 changed to 11.96
    • Malpractice RVU 1.01 changed to 1.03
    • Practice expense GPCI 0.908 changed to 0.917
    • Malpractice GPCI 1.172 changed to 1.201

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $532.73changed to$522.20

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 10.58 changed to 10.76
    • Malpractice RVU 1.03 changed to 1.01

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $524.03changed to$532.73

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $532.71changed to$524.03

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 10.43 changed to 10.58
    • Malpractice RVU 0.96 changed to 1.03
    • Practice expense GPCI 0.902 changed to 0.908
    • Malpractice GPCI 1.169 changed to 1.172

  5. January 1, 2023

    RVU23A

    $539.86changed to$532.71

    • Conversion factor 34.6062 changed to 33.8872
    • Practice expense RVU 10.33 changed to 10.43
    • Malpractice RVU 0.99 changed to 0.96
    • Practice expense GPCI 0.896 changed to 0.902
    • Malpractice GPCI 1.166 changed to 1.169

    Held through RVU23B, RVU23C, RVU23D.

  6. January 1, 2022

    RVU22A

    $551.34changed to$539.86

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 10.58 changed to 10.33
    • Malpractice RVU 0.97 changed to 0.99

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $565.77changed to$551.34

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 10.26 changed to 10.58
    • Practice expense GPCI 0.908 changed to 0.896
    • Malpractice GPCI 1.207 changed to 1.166

    Held through RVU21B, RVU21C, RVU21D.

  8. January 1, 2020

    RVU20A

    $572.10changed to$565.77

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 10.22 changed to 10.26
    • Malpractice RVU 1.02 changed to 0.97
    • Practice expense GPCI 0.921 changed to 0.908
    • Malpractice GPCI 1.247 changed to 1.207

    Held through RVU20B, RVU20C, RVU20D.

  9. January 1, 2019

    RVU19A

    $576.45changed to$572.10

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 10.37 changed to 10.22

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $575.90changed to$576.45

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 10.44 changed to 10.37
    • Malpractice RVU 1.04 changed to 1.02
    • Practice expense GPCI 0.920 changed to 0.921
    • Malpractice GPCI 1.204 changed to 1.247

    Held through RVU18B, RVU18C, RVU18D.

  11. January 1, 2017

    RVU17A

    $574.31changed to$575.90

    • Conversion factor 35.8043 changed to 35.8887
    • Practice expense RVU 10.48 changed to 10.44
    • Malpractice RVU 1.05 changed to 1.04
    • Practice expense GPCI 0.919 changed to 0.920
    • Malpractice GPCI 1.161 changed to 1.204

    Held through RVU17B, RVU17C, RVU17D.

  12. January 1, 2016

    RVU16A

    $578.53changed to$574.31

    • Conversion factor 35.9335 changed to 35.8043
    • Practice expense RVU 10.52 changed to 10.48
    • Malpractice RVU 1.07 changed to 1.05

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $575.66changed to$578.53

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $565.48changed to$575.66

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 10.39 changed to 10.52
    • Malpractice RVU 0.98 changed to 1.07
    • Practice expense GPCI 0.918 changed to 0.919
    • Malpractice GPCI 1.079 changed to 1.161

    Held through RVU15B.

  15. January 1, 2014

    RVU14A

    $570.20changed to$565.48

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 11.52 changed to 10.39
    • Malpractice RVU 1.02 changed to 0.98
    • Practice expense GPCI 0.916 changed to 0.918
    • Malpractice GPCI 0.997 changed to 1.079

    Held through RVU14B, RVU14C, RVU14D.

  16. January 1, 2013

    RVU13AR

    Earliest loaded release: $570.20

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$576.64$390.42RVU26D
2026-07-01$576.64$390.42RVU26C
2026-04-01$576.64$390.42RVU26B
2026-01-01$576.64$390.42RVU26A
2025-10-01$522.20$398.84RVU25D
2025-07-01$522.20$398.84RVU25C
2025-04-01$522.20$398.84RVU25B
2025-01-01$522.20$398.84RVU25A
2024-10-01$532.73$403.97RVU24D
2024-07-01$532.73$403.97RVU24C
2024-04-01$532.73$403.97RVU24B
2024-03-09$532.73$403.97RVU24AR
2024-01-01$524.03$397.37RVU24A
2023-10-01$532.71$401.28RVU23D
2023-07-01$532.71$401.28RVU23C
2023-04-01$532.71$401.28RVU23B
2023-01-01$532.71$401.28RVU23A
2022-10-01$539.86$403.74RVU22D
2022-07-01$539.86$403.74RVU22C
2022-04-01$539.86$403.74RVU22B
2022-01-01$539.86$403.74RVU22A
2021-10-01$551.34$403.46RVU21D
2021-07-01$551.34$403.46RVU21C
2021-04-01$551.34$403.46RVU21B
2021-01-01$551.34$403.46RVU21A
2020-10-01$565.77$414.71RVU20D
2020-07-01$565.77$414.71RVU20C
2020-04-01$565.77$414.71RVU20B
2020-01-01$565.77$414.71RVU20A
2019-10-01$572.10$417.43RVU19D
2019-07-01$572.10$417.43RVU19C
2019-04-01$572.10$417.43RVU19B
2019-01-01$572.10$417.43RVU19A
2018-10-01$576.45$416.97RVU18D
2018-07-01$576.45$416.97RVU18C
2018-04-01$576.45$416.97RVU18B
2018-01-01$576.45$416.97RVU18AR1
2017-10-01$575.90$415.77RVU17D
2017-07-01$575.90$415.77RVU17C
2017-04-01$575.90$415.77RVU17B
2017-01-01$575.90$415.77RVU17A
2016-10-01$574.31$414.39RVU16D
2016-07-01$574.31$414.39RVU16C
2016-04-01$574.31$414.39RVU16B
2016-01-01$574.31$414.39RVU16A
2015-10-01$578.53$416.72RVU15D
2015-07-01$578.53$416.72RVU15C
2015-04-01$575.66$414.65RVU15B
2015-01-01$575.66$414.65RVU15A
2014-10-01$565.48$407.63RVU14D
2014-07-01$565.48$407.63RVU14C
2014-04-01$565.48$407.63RVU14B
2014-01-01$565.48$407.63RVU14A
2013-10-01$570.20$401.91RVU13D
2013-07-01$570.20$401.91RVU13C
2013-04-01$570.20$401.91RVU13B
2013-01-01$570.20$401.91RVU13AR

Price 29870 for an earlier date of service

Where the New Mexico rate applies

New Mexico is a Medicare payment area, not a city. Our Census mapping connects it to 528 cities and communities in New Mexico. Some span more than one payment area; confirm with the service ZIP.

  • Abeytas
  • Abiquiu
  • Acomita Lake
  • Adelino
  • Agua Fria
  • Alamillo
  • Alamo
  • Alamogordo

Browse all communities in New Mexico

29870 billing questions

When should 29870 be chosen instead of a therapeutic knee arthroscopy code?

Use 29870 when the surgeon performs diagnostic inspection, with or without synovial biopsy, rather than a procedure to treat a finding. If the surgeon performs a definitive arthroscopic intervention in the same knee, report the therapeutic procedure rather than separately reporting the diagnostic inspection.

Is synovial biopsy included in 29870?

Yes. The code includes diagnostic knee arthroscopy whether or not the surgeon takes a synovial biopsy. A separately performed laboratory examination of the tissue may be reported by the appropriate laboratory provider.

Can 29870 be reported with a knee meniscectomy performed during the same session?

The diagnostic inspection is generally integral when the surgeon proceeds to a therapeutic arthroscopy in the same knee. Report the code for the meniscectomy, such as 29881 for a single-compartment meniscectomy, rather than separately reporting 29870.

How does the 90-day global period affect billing?

The global period includes the day-before preoperative visit and 90 days of related postoperative care. CMS applies this period to 29870.

How is bilateral 29870 reported?

When the procedure is performed on both knees, report modifier 50; CMS pays the bilateral procedure at 150%.

Can an assistant or co-surgeon be paid for 29870?

CMS restricts assistant-at-surgery payment for this code. Co-surgeons are paid only when supporting documentation is provided; team surgery is not permitted.

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 29870PPRRVU2026_Oct_nonQPP.csv, line 3,353 (RVU26D)
Geographic factors for New MexicoGPCI2026.csv, line 77 (RVU26D)

Open CMS sourceHow we calculate rates

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