20610

Aspiration and/or injection of a major joint or bursa (shoulder, hip, knee, or subacromial bursa) performed without ultrasound guidance.

Verified May 8, 2026 · 7 sources ↓

Medicare: $68.81
Total RVUs: 2.06
Global, days: 0
Region: Multi-region

Drawn from AAPCKzanowAnnexmedAskphcCMS

Documentation requirements

What must appear in the operative or office note to support the claim.

Source · Editorial brief grounded in 7 cited references ↓

Identify the specific joint treated by name and laterality (e.g., right knee, left shoulder).
State whether the procedure was aspiration, injection, or both.
Document the medication name and dosage for any therapeutic injection.
Record the clinical indication (e.g., degenerative joint disease, inflammatory arthritis, diagnostic fluid evaluation).
Confirm no ultrasound guidance was used, or — if it was — code to 20611 with saved images and a separate interpretation report.
Provider signature and date of service on the procedure note.
If billing a same-day E/M with modifier 25, document the distinct medical decision-making separately from the injection note.

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 24 Unrelated E/M during global 25 Significant separate E/M 50 Bilateral procedure 51 Multiple procedures 59 Distinct service 76 Repeat, same physician 77 Repeat, another physician 78 Unplanned return — related 79 Unrelated during global LT Left side RT Right side XS Separate structure

What this code covers

Source · Editorial summary grounded in 7 cited references ↓

CPT 20610 covers arthrocentesis of a major joint — shoulder, hip, knee, or subacromial bursa — whether the physician aspirates fluid, injects medication, or does both in the same session. The unit of service is the joint, not the number of passes or substances introduced. Two injections into the same knee on the same day still bill as one unit of 20610. If ultrasound guidance is used and fully documented (saved images, interpretation, separate report), the correct code is 20611 — not 20610.

Site laterality matters. CMS instructs billers to append RT or LT on every claim to identify which joint was treated. Bilateral same-day injections (e.g., both knees) report on two claim lines with RT and LT, or with modifier 50 depending on payer preference. Do not report more than one unit of 20610 per joint per encounter.

The global period is 000, so there is no post-op follow-up restriction beyond the day of service itself. A same-day E/M is billable with modifier 25 when the visit addresses a separate problem or a decision requiring additional workup beyond the injection itself — but the documentation must stand on its own. Arthrocentesis performed on the same joint as an open or arthroscopic procedure on that joint is not separately reportable per NCCI policy.

RVU & reimbursement

Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	0.77
Practice expense RVU	1.16
Malpractice RVU	0.13
Total RVU	2.06
Medicare national rate	$68.81
Global period	0 days

Payment by site of service

Medicare pays different rates by setting. HOPD typically pays substantially more than ASC for the same procedure.

Source · CMS OPPS Addendum B·ASC HCPCS payment rates·2026

Setting	Medicare rate (national)
Office (PFS non-facility) Procedure performed in physician's office	$68.81
HOPD (APC 5441) Hospital outpatient department	$313.60
ASC (PI P3) Ambulatory surgical center (freestanding)	$38.94

Common denial reasons

The recurring reasons claims for CPT 20610 get rejected.

Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓

Billing 20611 without saved ultrasound images or a separate interpretation report — default to 20610 when that documentation is absent.
Multiple units of 20610 reported for the same joint in one encounter; CMS allows only one unit per joint regardless of number of injections or aspirations.
Same-day E/M denied because documentation fails to show a distinct problem or decision separate from the injection.
Missing RT/LT laterality modifier triggers claim edits or payer rejections, especially on Medicare claims.
20610 billed on the same joint as a same-day arthroscopic or open joint procedure — NCCI bundles these and does not allow unbundling with a modifier.

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 7 cited references ↓

01Can I bill two units of 20610 if the physician injected both the knee joint and the prepatellar bursa in the same session?

No. The unit of service for 20610 is the joint and its surrounding bursae combined. Per CMS NCCI policy, one unit covers the joint and any bursae associated with it, regardless of how many structures are injected.

02When does the physician's use of ultrasound require switching from 20610 to 20611?

Switch to 20611 only when the note documents a focused ultrasound evaluation, images obtained in multiple planes, interpretation of normal and abnormal findings, and a separate stand-alone report stored in the chart. If any of those elements are missing, bill 20610.

03Can I bill a same-day E/M with 20610?

Yes, with modifier 25, but only if the E/M addresses a separate or newly presenting problem that requires independent medical decision-making. The E/M note must be distinct from the injection procedure note. If payers routinely deny it, appeal with the office note showing the separate problem.

04How do I bill bilateral knee injections performed on the same date?

Report two claim lines of 20610 — one with RT and one with LT — or use modifier 50 on a single line, depending on the payer. Medicare prefers separate lines with RT and LT. Confirm individual payer preference before submitting.

05Is 20610 separately billable when performed on the same joint as a same-day arthroscopy?

No. NCCI policy bundles arthrocentesis with open or arthroscopic joint procedures performed on the same joint at the same encounter. You cannot unbundle with modifier 59. If the arthrocentesis was performed on a different joint during the same visit, laterality or anatomic modifiers may support separate reporting.

06Can 20610 and 96372 be billed together for a joint injection?

Generally no. NCCI bundles 20610 with 96372 (subcutaneous or intramuscular injection). The modifier indicator is 1, so unbundling is theoretically possible with supporting documentation, but the injection administration is typically considered integral to the arthrocentesis service.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

Mira's AI scribe captures the joint name and side from dictation, the procedure type (aspiration, injection, or both), the medication and dosage, and the clinical indication — then flags if the physician mentions ultrasound so the coder can evaluate whether 20611 applies. This prevents the most common 20610 denial: a note that says 'knee injection' without laterality, substance, or indication, which auditors and payers routinely reject.

See how Mira captures CPT 20610 documentation