Arthrocentesis

CPT 20610
Approach Bedside
Add-on / Variant CPTs
  • 20605 — Arthrocentesis, intermediate joint (wrist, elbow, TMJ)
  • 20600 — Arthrocentesis, small joint (finger, toe)
  • 76942 — Ultrasound guidance for needle placement (if used with real-time imaging)
Preoperative Diagnosis:

[Knee / shoulder / hip / ankle] effusion, [septic arthritis / gout / pseudogout / traumatic / inflammatory arthritis / unknown]

Postoperative Diagnosis:

Same

Procedure Performed:

Arthrocentesis, [right / left] [knee / shoulder / hip / ankle] [with / without] ultrasound guidance

Attending Surgeon:

[Attending name], MD

First Assistant:

N/A

Anesthesia:

Local: 1% lidocaine infiltrated to skin and subcutaneous tissue. [Ultrasound-guided approach used.]

Indications:

Patient presents with [painful / swollen / warm] [right / left] [knee] with [X] mL clinical effusion. [Fever / leukocytosis / elevated CRP / trauma] present. Concern for [septic arthritis / crystal arthropathy / inflammatory flare]. Arthrocentesis indicated for diagnosis and relief. Risks including infection, bleeding, joint injury, and vasovagal response discussed. Consent obtained.

Findings:

[Clear / cloudy / yellow / bloody / purulent] synovial fluid aspirated. [X] mL removed. [Sent for cell count, differential, crystal analysis, gram stain, and culture / Gram stain and culture sent given concern for infection.] [Corticosteroid / hyaluronic acid injected after aspiration.]

Description of Procedure:

The patient was positioned [supine / seated] with the [right knee / shoulder] in [mild flexion / abduction / neutral]. The [knee / shoulder] was identified by [palpation / ultrasound landmarks]. The skin was prepped with [betadine / chlorhexidine]. [1% lidocaine was infiltrated to the skin and subcutaneous tissue.]
A [18-gauge / 20-gauge] needle was advanced into the [joint space / suprapatellar pouch / glenohumeral joint] using [palpation landmarks / ultrasound guidance with real-time visualization of needle tip]. [Aspiration confirmed by return of synovial fluid.] [X] mL of [clear / turbid / bloody / purulent] fluid was aspirated. [Corticosteroid / [X] mg triamcinolone with [X] mL 0.5% bupivacaine was injected after aspiration.]
Needle removed. Gentle pressure applied. A bandage was placed. Patient tolerated the procedure well without complications. [Fluid sent to laboratory for cell count, differential, crystal analysis, gram stain, and culture.]

Complications:

None

Specimens:

Synovial fluid sent for cell count, differential, crystal analysis, gram stain, and culture

Estimated Blood Loss:

Minimal

Drains:

None

Disposition:

Patient discharged home / remaining admitted for further management.

Epic SmartPhrase Version 
PREOPERATIVE DIAGNOSIS: [Right / left] [knee / shoulder / hip / ankle] effusion, [septic arthritis / crystal arthropathy / inflammatory / traumatic / unknown]
POSTOPERATIVE DIAGNOSIS: Same
PROCEDURE PERFORMED: Arthrocentesis, [right / left] [knee / shoulder / hip / ankle] [with / without] ultrasound guidance
ATTENDING SURGEON: ***, MD/DO
ANESTHESIA: Local: 1% lidocaine to skin and subcutaneous tissue

INDICATIONS: The patient is a .PTAGE-year-old .PTSEX presenting with [painful / swollen / warm] [right / left] [knee / shoulder] with clinical effusion. [Fever / leukocytosis / elevated CRP] present. Concern for [septic arthritis / gout / pseudogout / inflammatory flare]. Arthrocentesis indicated for diagnosis and therapeutic relief. Risks discussed. Informed consent obtained.

FINDINGS: [Clear / cloudy / turbid / bloody / purulent] synovial fluid aspirated. *** mL removed. Fluid sent for cell count, differential, crystal analysis, gram stain, and culture. [Corticosteroid injected after aspiration.]

DESCRIPTION OF PROCEDURE:
Patient [supine / seated]; [right / left] [knee / shoulder] positioned [in mild flexion / in abduction]. Site identified by [palpation / ultrasound guidance]. Skin prepped with [betadine / chlorhexidine]. 1% lidocaine infiltrated to skin. [18 / 20]-gauge needle advanced into [joint space / suprapatellar pouch / glenohumeral joint] via [medial / lateral / anterior approach] under [palpation / real-time ultrasound guidance with needle tip visualization]. *** mL [clear / turbid / bloody] fluid aspirated. [*** mg triamcinolone with *** mL 0.5% bupivacaine injected after aspiration.] Needle removed; pressure applied; bandage placed. Fluid sent to laboratory. Patient tolerated the procedure well.

ESTIMATED BLOOD LOSS: Minimal
SPECIMENS: Synovial fluid for cell count, differential, crystal analysis, gram stain, and culture
COMPLICATIONS: None
DRAINS: None
DISPOSITION: [Discharged home / Admitted for further management pending culture results]

Signed: .ME, .MYDEGREE
.TODAY
Variants

Septic arthritis aspiration (bedside vs. OR)

If septic arthritis is confirmed (WBC >50,000, PMN >75%, positive gram stain), formal OR washout and irrigation is generally indicated rather than serial aspirations. Document urgency of disposition after results return.

Hip arthrocentesis

Hip joint is deep. Ultrasound or fluoroscopic guidance is strongly preferred. Anterior or lateral approach. Document approach, guidance modality, and depth of needle insertion.

Shoulder (glenohumeral) arthrocentesis

Posterior approach (posterior portal landmark) or anterior approach. Ultrasound-guided reduces risk of rotator cuff needle passage. Document approach and landmarks.

Charting Tips
  • Document joint aspirated, laterality, and approach (medial, lateral, anterior, posterior)
  • State volume and appearance of synovial fluid aspirated
  • List all studies sent on the fluid (cell count, crystal, culture at minimum)
  • Document whether corticosteroid or hyaluronic acid was injected and the drug/dose
  • Note ultrasound guidance if used, as it is required for separate billing of 76942
  • WBC >50,000/mm3 in synovial fluid should trigger urgent orthopedic evaluation for septic arthritis
Billing Tips
  • Bill 20610 for arthrocentesis of a major joint or bursa (knee, shoulder, hip, ankle, sacroiliac joint) with or without ultrasound guidance: 0.77 wRVU, 0-day global. Bill 20605 for intermediate joint (wrist, elbow, ankle), and 20600 for small joint (finger, toe). Joint size determines the code; verify at coding.
  • Ultrasound guidance (76942) can be billed separately when used for image-guided arthrocentesis, but only if a separately licensed provider performs or supervises the imaging and a formal ultrasound report is generated. Document real-time ultrasound guidance and needle tip visualization explicitly.
  • Injection of corticosteroid or hyaluronic acid at the same session: 20610 covers both aspiration and injection. Do not separately bill for the injection procedure. The drug itself (J-code) is separately billable as a supply.
  • 0-day global period: follow-up visits after arthrocentesis are fully separately billable with standard E/M codes. There is no bundled postoperative period.
  • If performed in the office, modifier -25 may be required on the associated E/M visit to confirm a separately identifiable evaluation and management service was provided on the same day as the procedure. Confirm payer policy.