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Billing code 27347: Knee cyst excisionMedicare rate & RVUs

Report open surgical excision of a cyst arising in the knee area, such as a ganglion, when the surgeon removes the cyst rather than aspirating it.

CMS RVU26DEffective Oct 1, 2026109 payment localities414 Medicare services in 2024

Medicare pays $508.03 for 27347 nationally in a facility.

Medicare rate · 27347

Knee cyst excision

Swap in your local Medicare rate.

Work RVUs
6.56
Total RVUs
15.21
Global days
090

National rate · 2026

$508.03

Facility setting, before claim adjustments.

See every locality for 27347 → · 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 27347 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 27347 covers

This code describes open removal of a cyst in the knee area, commonly a ganglion cyst. An orthopedic surgeon typically performs the procedure in an operating room, exposing and excising the cyst through an incision. The operative report should establish that the target was a cyst and that it was removed by an open approach, rather than treated by aspiration or arthroscopy.

Select this code for the documented knee cyst; use a code specific to a popliteal cyst when that is the lesion removed. The operative note should identify the cyst’s location and describe the excision. CMS assigns 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%; bilateral reporting with modifier 50 is paid at 150%. Assistant-at-surgery payment may be available; co-surgeon payment requires 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.

Where 27347 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

27347 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$458.08
Alaska*Unavailable$613.36
ArizonaUnavailable$494.01
ArkansasUnavailable$451.89
AtlantaUnavailable$521.59
AustinUnavailable$517.52
BakersfieldUnavailable$518.13
Baltimore/Surr. CntysUnavailable$539.96
BeaumontUnavailable$482.88
BrazoriaUnavailable$497.74

27347 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
27347 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 27347 rate is calculated

Each of 27347’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 · 27347

RVUs × geographic indexes × conversion factor

Swap in your local Medicare rate.

Work 6.56Practice expense 7.31Malpractice 1.34

15.2100 adjusted RVUs×$33.4009 conversion factor=$508.03

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

Payment rules and modifiers for 27347

27347 has a 90-day global period: related visits in that window are included in the surgery payment.

CMS payment indicators · 27347

Knee cyst excision

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)2Paid.
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 · 27347

Knee cyst excision

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 50 · payment effect

With and without the modifier

27347 without 50 · national facility

$508.03

Knee cyst excision

27347-50 · Bilateral: 150%

$762.05

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

27347 compared with similar codes

Compare codes

27347 vs 27345 vs 27340 vs 27327 vs 27328: national Medicare rates

Swap in your local Medicare rate.

  • 27347
    Knee cyst excision · 6.56 wRVU
    —
  • 27345
    Knee cyst excision · 5.94 wRVU
    —
  • 27340
    Bursa excision · 4.21 wRVU
    —
  • 27327
    Soft-tissue excision · 3.86 wRVU
    $539.42
  • 27328
    Soft-tissue tumor excision · 8.63 wRVU
    —

How to choose

27345Knee cyst excision
27345 is specific to excision of a popliteal cyst. Use 27347 for open excision of another knee-area cyst, such as a ganglion.
27340Bursa excision
27340 describes removal of the prepatellar bursa. A cyst excision is reported with 27347 when the removed structure is documented as a cyst.
27327Soft-tissue excision
27327 applies to a small, superficial soft-tissue lesion in the thigh or knee area. Use 27347 when the operative target is a knee cyst.
27328Soft-tissue tumor excision
27328 describes excision of a deep soft-tissue tumor in the thigh or knee area. It is not the cyst-specific code for an open knee cyst excision.

Codes related to 27347

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

Codes related to 27347
CodeHow it relatesNational office range
Used instead
27345Knee cyst excisionFor excision of a popliteal cyst rather than another knee-area cyst.No office rate
27340Bursa excisionFor removal of the prepatellar bursa, not excision of a cyst.No office rate
27327Soft-tissue excisionFor excision of a small superficial soft-tissue lesion in the thigh or knee area.$471.55–$708.72
27328Soft-tissue tumor excisionFor excision of a deep soft-tissue tumor in the thigh or knee area.No office rate

27347 billing questions

How is this different from removal of a popliteal cyst?

Use 27347 for open excision of a knee cyst such as a ganglion. Code 27345 is specific to excision of a popliteal cyst.

Does this code describe aspiration or arthroscopic treatment?

No. It describes open excision. The operative documentation should show that the surgeon removed the cyst through an open approach.

What documentation supports reporting 27347?

Document the cyst diagnosis and knee-area location, the open approach, and the surgeon’s excision of the cyst. The note should distinguish the cyst from a soft-tissue mass or bursa.

How does the 90-day global period affect follow-up visits?

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

Can 27347 be reported for both knees?

CMS lists bilateral payment with modifier 50 at 150%. The operative documentation must support treatment of cysts on both sides.

How are other procedures in the same session paid?

Under the standard multiple-procedure reduction, the highest-valued procedure is paid in full and other procedures are paid at 50%. Assistant-at-surgery payment may be available; co-surgeon payment requires supporting documentation.

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 27347PPRRVU2026_Oct_nonQPP.csv, line 2,851 (RVU26D)

Open CMS sourceHow we calculate rates

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