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Billing code 31400: Larynx revisionMedicare rate & RVUs

Reports an operative revision of laryngeal anatomy, typically by an otolaryngologist when prior laryngeal surgery requires surgical correction.

CMS RVU26DEffective Oct 1, 2026109 payment localities42 Medicare services in 2024

Medicare pays $933.89 for 31400 nationally in a facility.

Medicare rate · 31400

Larynx revision

Swap in your local Medicare rate.

Work RVUs
11.31
Total RVUs
27.96
Global days
090

National rate · 2026

$933.89

Facility setting, before claim adjustments.

See every locality for 31400 → · 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 31400 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 31400 covers

billing code 31400 represents an operative revision of laryngeal anatomy, commonly performed by an otolaryngologist or head and neck surgeon in an operating room. It is used when the surgeon revises a prior laryngeal alteration rather than performing only an examination, biopsy, or routine endoscopic treatment. The operative report should identify the laryngeal structures revised, the corrective work performed, and the reason for revision.

Select this code when the documented operation fits a general larynx revision and a more specific laryngoplasty or other laryngeal procedure does not better describe the work. The 90-day global period includes 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 other procedures are subject to the standard 50% reduction. Report one service rather than modifier 50. An assistant at surgery may be paid; 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.

Where 31400 pays more and less

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

109 of 109 payment localities

31400 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$847.34
Alaska*Unavailable$1,130.59
ArizonaUnavailable$910.42
ArkansasUnavailable$836.52
AtlantaUnavailable$954.12
AustinUnavailable$957.42
BakersfieldUnavailable$967.62
Baltimore/Surr. CntysUnavailable$989.57
BeaumontUnavailable$884.89
BrazoriaUnavailable$920.28

31400 rates by state

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

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

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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.

View every state and territory as a table
31400 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

How the 31400 rate is calculated

Each of 31400’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 · 31400

RVUs × geographic indexes × conversion factor

Swap in your local Medicare rate.

Work 11.31Practice expense 15.00Malpractice 1.65

27.9600 adjusted RVUs×$33.4009 conversion factor=$933.89

All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.

Payment rules and modifiers for 31400

31400 has a 90-day global period: related visits in that window are included in the surgery payment.

CMS payment indicators · 31400

Larynx revision

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)0The 150% bilateral adjustment doesn’t apply.
Assistant at surgery (80/81/82/AS)2Paid.
Co-surgeons (62)0Not permitted.
Team surgery (66)0Not permitted.
Professional/technical0Physician service: no professional/technical split.
Split (54/55/56)0.10/0.76/0.14Share of the payment for pre-op, the procedure itself, and post-op care.

Global surgery period · 31400

Larynx revision

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.

  • 24 Unrelated E/M visit by the same physician
  • 79 Unrelated procedure (starts its own global period)
  • 58 Staged, more extensive, or therapy procedure that was planned
  • 78 Unplanned 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 51 · payment effect

With and without the modifier

31400 without 51 · national facility

$933.89

Larynx revision

31400-51 · Second procedure: 50%

$466.95

When this isn’t the highest-valued procedure in the session, Medicare pays 50% of its fee schedule amount (the highest is paid at 100%).

When to use modifier 51

31400 compared with similar codes

Compare codes

31400 vs 31580 vs 31599: national Medicare rates

Swap in your local Medicare rate.

  • 31400
    Larynx revision · 11.31 wRVU
    —
  • 31580
    Laryngoplasty · 14.24 wRVU
    —
  • 31599
    · 0 wRVU
    —

How to choose

31580Laryngoplasty
31580 describes a specific laryngoplasty service. Use 31400 when the operation is a laryngeal revision that is not better represented by that specific procedure.
31599Unlisted procedure larynx
Use 31599 for a laryngeal procedure without a specific listed code. Use 31400 when the documented service is appropriately represented as larynx revision.

Codes related to 31400

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

Codes related to 31400
CodeHow it relatesNational office range
Used instead
31580LaryngoplastyA laryngoplasty code may be more appropriate when the operation matches that specific procedure.No office rate
31599Unlisted procedure larynxUnlisted larynx procedure code for work not represented by a specific listed procedure.No office rate

31400 billing questions

When should I report 31400 instead of a laryngoplasty code?

Use 31400 for a documented operative revision that is not more specifically described by a laryngoplasty code. If the operative report identifies a specific reconstructive technique, evaluate the corresponding specific code.

Can I report 31400 for a laryngeal examination or biopsy?

No. The operative documentation must support revision of laryngeal anatomy; examination or biopsy alone does not describe this service.

What postoperative care is included?

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

How are other procedures in the same session paid?

The highest-valued procedure is paid in full, and other procedures are subject to the standard multiple procedure reduction.

Can I report modifier 50 for bilateral laryngeal revision?

No. Report the laryngeal revision as one service; modifier 50 is not appropriate for this code.

Can an assistant or co-surgeon be reported?

An assistant at surgery may be paid. Co-surgeons and team surgery are not permitted 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 31400PPRRVU2026_Oct_nonQPP.csv, line 3,568 (RVU26D)

Open CMS sourceHow we calculate rates

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