FeeBase
Log inGet started
Menu

HCPCS code J3304: Triamcinolone injection, extended-release, per 1 mg2026 Medicare rate & RVUs

J3304 identifies preservative-free, extended-release triamcinolone acetonide in microspheres, generally administered into the knee joint for osteoarthritis.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare rate · J3304

Triamcinolone injection, extended-release, per 1 mg

Office or facility?

Work RVUs
0
Total RVUs
0.00
Global days
XXX

National rate · 2026

—

Not priced in the facility setting.

See every locality for J3304 →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.

Your location

Medicare pays by the payment locality where the service is performed.

On this page 10 sections
  1. Medicare rate
  2. What J3304 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 J3304 covers

J3304 represents preservative-free triamcinolone acetonide in an extended-release microsphere formulation, marketed as Zilretta. It is administered by intra-articular injection, typically by a physician or other qualified practitioner treating knee osteoarthritis. The code identifies the drug, not the joint-injection procedure; the administration is reported separately when appropriate.

CMS assigns J3304 physician fee schedule status E, meaning it is excluded from the physician fee schedule. When Medicare covers the drug, payment is handled under another payment method; as a Part B drug, it is generally priced using CMS quarterly Average Sales Price files. Special Medicare coverage instructions apply. Each unit represents 1 mg of triamcinolone acetonide, so report the number of units that matches the dose administered.

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 J3304 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

J3304 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailableUnavailable
AlaskaUnavailableUnavailable
ArizonaUnavailableUnavailable
ArkansasUnavailableUnavailable
Atlanta, GAUnavailableUnavailable
Austin, TXUnavailableUnavailable
Bakersfield, CAUnavailableUnavailable
Baltimore area, MDUnavailableUnavailable
Beaumont, TXUnavailableUnavailable
Brazoria, TXUnavailableUnavailable

J3304 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.

View every state and territory as a table
J3304 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 J3304 rate is calculated

Each of J3304’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 · J3304

RVUs × geographic indexes × conversion factor

Office or facility?

Work0.00

0.00 RVUs× 1.000 GPCI

Practice expense0.00

0.00 RVUs× 1.000 GPCI

Malpractice0.00

0.00 RVUs× 1.000 GPCI

Adjusted RVUs

0.0000

Conversion factor

$33.4009

Medicare rate

$0.00

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

Payment rules and modifiers for J3304

J3304 has no global surgery period, no multiple-procedure, bilateral or assistant-at-surgery adjustment, and no professional/technical split. What changes the payment is where the service happens: the place of service on the claim decides whether Medicare pays the office or the facility rate.

Place of service · J3304

Which rate does Medicare pay?

The POS code on the claim line (CMS-1500 box 24B).

POS 11 · non-facility rate · national

—

J3304 isn’t priced in this setting.

J3304 compared with similar codes

Compare codes · National

4 codes, side by side

Office or facility?

  • J3304

    Triamcinolone injection, extended-release, per 1 mg0 wRVU

    Not priced

  • J3301

    Triamcinolone injection, per 10 mg0 wRVU

    Not priced

  • J3300

    Triamcinolone injection, preservative-free, per 1 mg0 wRVU

    Not priced

  • J3303

    Triamcinolone hexacetonide, per 5 mg0 wRVU

    Not priced

How to choose

J3301Triamcinolone injectionPer 10 mg
J3301 identifies another triamcinolone acetonide injection. J3304 is specific to the preservative-free extended-release microsphere product.
J3300Triamcinolone injectionPreservative-free, per 1 mg
J3300 identifies preservative-free triamcinolone acetonide in a different formulation; J3304 identifies the extended-release microsphere product.
J3303Triamcinolone hexacetonidePer 5 mg
J3303 is triamcinolone hexacetonide. Select J3304 only when the extended-release triamcinolone acetonide microsphere product was administered.

Codes related to J3304

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

Codes related to J3304
CodeHow it relatesNational office range
Same family
J3301Triamcinolone injection, per 10 mgTriamcinolone acetonide injection in a different formulation.No office rate
J3300Triamcinolone injection, preservative-free, per 1 mgPreservative-free triamcinolone acetonide injection in a different formulation.No office rate
J3302Triamcinolone diacetate, per 5 mgTriamcinolone diacetate injection, a different triamcinolone product.No office rate
J3303Triamcinolone hexacetonide, per 5 mgTriamcinolone hexacetonide injection, a different triamcinolone product.No office rate
Often billed with
20610Joint injection, major joint or bursa, no ultrasoundReports injection into a major joint or bursa without ultrasound guidance.$61.24–$86.75

J3304 billing questions

When should J3304 be used instead of J3301?

Use J3304 for the preservative-free, extended-release microsphere formulation. J3301 identifies a different triamcinolone acetonide injection and is not a substitute for this formulation.

How many units should be reported?

Each J3304 unit represents 1 mg. Report units corresponding to the milligrams administered.

Does J3304 include the joint injection procedure?

No. J3304 identifies the drug; report the joint-injection procedure separately when appropriate. CPT 20610 describes injection into a major joint or bursa without ultrasound guidance.

How does Medicare treat J3304?

CMS assigns physician fee schedule status E, so the code is excluded from the physician fee schedule. When covered, it is generally paid as a Part B drug using CMS quarterly ASP drug pricing files, and special Medicare coverage instructions apply.

What should the record support?

Document the extended-release product administered, the dose in milligrams, and the injection site. The product and dose support selection of J3304 and calculation of its units.

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

Open CMS sourceHow we calculate rates

Did this answer your question about what J3304 pays?

Tell us what you were actually trying to work out. We’ll answer you directly, or build the page that does.

Fee sheets · Coming soon

Put J3304 and the rest of your codes on one sheet

Your codes at your locality, with payer contracts beside Medicare.

Join the waitlist