Billing code 23935: Bone drainageMedicare rate & RVUs in Redding

Reports deep operative drainage involving the humerus or elbow when the surgeon opens the bone cortex to reach and drain the affected site.

CMS RVU26DEffective Oct 1, 2026One payment locality123 Medicare services in 2024

In Redding, Medicare pays $502.16 for 23935 in a facility. There’s no office rate.

Not available in this settingOffice (non-facility)
$502.16Hospital or facility

Check a contract rate as a % of Medicare · 23935 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 23935 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Redding
  2. What 23935 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 23935 covers

This service involves a deep incision to reach the humerus or elbow and opening the bone cortex to drain an affected site, such as a bone abscess. It is typically performed by an orthopedic surgeon in an operating room when the infection or collection requires access through the cortex rather than drainage of a superficial or soft-tissue space.

Select 23935 when the operative work includes opening the cortex of the humerus or elbow; the operative report should identify the anatomic site, the deep collection or bone involvement, and the cortical opening and drainage performed. CMS classifies the service as major surgery with a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures occur in the same session, the highest-valued procedure is paid in full and others at 50%. For bilateral procedures, modifier 50 is paid at 150%. Assistant-at-surgery payment requires documented medical necessity; co-surgeons and team surgery are 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 Redding compares for 23935

Across 109 of 109 payment localities, the facility rate for 23935 runs from $439.85 in Arkansas to $605.96 in San Jose-Sunnyvale-Santa Clara (San Benito Cnty). Redding pays $502.16. The RVUs are the same everywhere; the geographic indexes change the dollars.

23935 in Redding vs other payment areas
  1. Redding · this page$502.16
  2. Bakersfield · California$505.74+$3.58
  3. Chico · California$502.16
  4. El Centro · California$502.38+$0.22
  5. Fresno · California$502.16
  6. Hanford-Corcoran · California$502.16

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

Every other payment area

23935 in every other Medicare payment locality
Payment localityOfficeFacility
MaderaCalifornia—$502.16
MercedCalifornia—$502.16
ModestoCalifornia—$502.16
NapaCalifornia—$564.70
Oxnard-Thousand Oaks-VenturaCalifornia—$529.22
Rest Of CaliforniaCalifornia—$502.16
Riverside-San Bernardino-OntarioCalifornia—$516.13
Sacramento-Roseville-FolsomCalifornia—$522.47

23935 rates by state

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

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Local rates. Clear comparisons.

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

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23935 office rate range by state
State / territoryOffice rate rangeLocalities
AKNo published base rate1
ALNo published base rate1
ARNo published base rate1
AZNo published base rate1
CANo published base rate29
CONo published base rate1
CTNo published base rate1
DCNo published base rate1
DENo published base rate1
FLNo published base rate3
GANo published base rate2
GUNo published base rate1
HINo published base rate1
IANo published base rate1
IDNo published base rate1
ILNo published base rate4
INNo published base rate1
KSNo published base rate1
KYNo published base rate1
LANo published base rate2
MANo published base rate2
MDNo published base rate3
MENo published base rate2
MINo published base rate2
MNNo published base rate1
MONo published base rate3
MSNo published base rate1
MTNo published base rate1
NCNo published base rate1
NDNo published base rate1
NENo published base rate1
NHNo published base rate1
NJNo published base rate2
NMNo published base rate1
NVNo published base rate1
NYNo published base rate5
OHNo published base rate1
OKNo published base rate1
ORNo published base rate2
PANo published base rate2
PRNo published base rate1
RINo published base rate1
SCNo published base rate1
SDNo published base rate1
TNNo published base rate1
TXNo published base rate8
UTNo published base rate1
VANo published base rate2
VINo published base rate1
VTNo published base rate1
WANo published base rate2
WINo published base rate1
WVNo published base rate1
WYNo published base rate1

See 23935 in every payment locality

How the 23935 rate is calculated

Each of 23935’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 · 23935

RVUs × geographic indexes × conversion factor

Work6.22

6.22 RVUs× 1.000 GPCI

Practice expense7.31

7.31 RVUs× 1.000 GPCI

Malpractice1.30

1.30 RVUs× 1.000 GPCI

Adjusted RVUs

14.8300

Conversion factor

$33.4009

Medicare rate

$495.34

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

The exact Redding inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

2,255

Code
23935
Physician work
6.22
Practice expense
7.31
Malpractice
1.30

GPCI2026.csv

19

Locality
Redding
Physician work
1.017
Practice expense
1.096
Malpractice
0.536
Facility calculation for 23935 in Redding
ComponentRVULocality factorAdjusted
Physician work6.22× 1.0176.3257
Practice expense7.31× 1.0968.0118
Malpractice1.30× 0.5360.6968
Total RVUs15.0343
Conversion factor× 33.4009

Facility rate, Redding$502.16

Facility: (6.22 × 1.017 + 7.31 × 1.096 + 1.3 × 0.536) × $33.4009 = $502.16

Open 23935 in the RVU calculator

Payment rules and modifiers for 23935

23935 has a 90-day global period: related visits in that window are included in the surgery payment.

CMS payment indicators · 23935

Bone drainage

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)0Not paid without supporting documentation.
Co-surgeons (62)0Not permitted.
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 · 23935

Bone drainage

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

23935 without 50 · national facility

$495.34

Bone drainage

23935-50 · Bilateral: 150%

$743.01

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

How 23935 has changed in Redding

23935 · Office / nonfacility

Rate unavailable

Effective 2026-10-01

A rate is unavailable in one of these releases, so a change cannot be calculated.

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
Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01Not available in this setting$502.16RVU26D
2026-07-01Not available in this setting$502.16RVU26C
2026-04-01Not available in this setting$502.16RVU26B
2026-01-01Not available in this setting$502.16RVU26A
2025-10-01Not available in this setting$522.88RVU25D
2025-07-01Not available in this setting$522.88RVU25C
2025-04-01Not available in this setting$522.88RVU25B
2025-01-01Not available in this setting$522.88RVU25A
2024-10-01Not available in this setting$533.36RVU24D
2022-07-01Not available in this setting$531.94RVU22C
2021-04-01Not available in this setting$534.28RVU21B
2021-01-01Not available in this setting$534.28RVU21A
2020-10-01Not available in this setting$536.68RVU20D
2020-07-01Not available in this setting$536.68RVU20C
2020-04-01Not available in this setting$536.68RVU20B
2020-01-01Not available in this setting$536.68RVU20A
2019-10-01Not available in this setting$530.38RVU19D
2019-07-01Not available in this setting$530.38RVU19C
2019-04-01Not available in this setting$530.38RVU19B
2019-01-01Not available in this setting$530.38RVU19A
2018-10-01Not available in this setting$526.49RVU18D
2018-07-01Not available in this setting$526.49RVU18C
2018-04-01Not available in this setting$526.49RVU18B
2018-01-01Not available in this setting$526.49RVU18AR1
2017-10-01Not available in this setting$528.76RVU17D
2017-07-01Not available in this setting$528.76RVU17C
2017-04-01Not available in this setting$528.76RVU17B
2017-01-01Not available in this setting$528.76RVU17A
2016-10-01Not available in this settingRate data unavailableRVU16D
2016-07-01Not available in this settingRate data unavailableRVU16C
2016-04-01Not available in this settingRate data unavailableRVU16B
2016-01-01Not available in this settingRate data unavailableRVU16A
2015-10-01Not available in this settingRate data unavailableRVU15D
2015-07-01Not available in this settingRate data unavailableRVU15C
2015-04-01Not available in this settingRate data unavailableRVU15B
2015-01-01Not available in this settingRate data unavailableRVU15A
2014-10-01Not available in this settingRate data unavailableRVU14D
2014-07-01Not available in this settingRate data unavailableRVU14C
2014-04-01Not available in this settingRate data unavailableRVU14B
2014-01-01Not available in this settingRate data unavailableRVU14A
2013-10-01Not available in this settingRate data unavailableRVU13D
2013-07-01Not available in this settingRate data unavailableRVU13C
2013-04-01Not available in this settingRate data unavailableRVU13B
2013-01-01Not available in this settingRate data unavailableRVU13AR

Price 23935 for an earlier date of service

Where the Redding rate applies

Redding is a Medicare payment area, not a city. Our Census mapping connects it to 32 cities and communities in California. Some span more than one payment area; confirm with the service ZIP.

Browse all communities in California

23935 billing questions

When should I choose 23935 instead of 23930?

Use 23935 when the surgeon opens the bone cortex of the humerus or elbow to drain the deep site. Code 23930 describes deep drainage in the upper arm or elbow area without that cortical opening.

How is 23935 different from drainage of an elbow bursa?

23935 involves opening the humerus or elbow cortex. Use 23931 when the operative target is an upper-arm or elbow bursa.

What documentation supports 23935?

The operative report should identify the humerus or elbow site and describe the deep approach, cortical opening, and drainage performed.

What does the 90-day global period include?

The day-before preoperative visit and 90 days of related postoperative care are included in the global period.

Can 23935 be reported bilaterally?

For a bilateral procedure, CMS pays the service with modifier 50 at 150%.

When can an assistant surgeon be paid?

Assistant-at-surgery payment is allowed only when medical necessity is documented. CMS does not permit co-surgeons or team surgery for this code.

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 23935PPRRVU2026_Oct_nonQPP.csv, line 2,255 (RVU26D)
Geographic factors for ReddingGPCI2026.csv, line 19 (RVU26D)

Open CMS sourceHow we calculate rates

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