CPT 23066Surgery

Biopsy shoulder tissues

CPT code 23066 represents a surgical procedure where a physician removes a small tissue sample from the shoulder area for laboratory analysis. This biopsy helps diagnose conditions like tumors, infections, or inflammatory diseases affecting shoulder tissues.

Showing rates for

National Average

Base Medicare rate

$562.83

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

4.3

PE RVU (NF)

12.2

MP RVU

0.9

Total RVU

17.4

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

Loading bundling edits…

Billing tips

Always verify place of service code matches actual location - billing as non-facility (POS 11) when performed in facility setting (POS 22/24) constitutes fraud
Impact: Incorrect POS coding creates $192.14 overpayment per claim and significant audit risk with potential False Claims Act liability
Document exact tissue type biopsied (muscle, tendon, bursa, capsule) and depth in operative report to differentiate from superficial soft tissue biopsy codes (20206) or deeper bone biopsy (23065)
Impact: Prevents downcoding to 20206 ($247.59) which represents a $315.24 loss per procedure or incorrect upcoding risk
Link diagnosis codes showing medical necessity such as neoplasm of uncertain behavior (D48.1), shoulder mass (M79.89), or specific tumor codes rather than vague pain codes
Impact: Vague diagnosis codes like M25.511 (shoulder pain) increase denial risk by 45-60% requiring costly appeals and delaying payment
Submit pathology report with claim or on appeal to support medical necessity, especially for Medicare Advantage and commercial payers with prior authorization requirements
Impact: Pathology documentation reduces denial rate from 28% to under 5% and expedites payment by 15-20 days on average
When imaging-guided (ultrasound or fluoroscopy), bill appropriate imaging code separately (76942 or 77002) with modifier 26 if only interpretation performed
Impact: Adds $42-68 in additional reimbursement when imaging guidance is used and documented; frequently overlooked revenue
For Medicare patients, verify 23066 is not on the Inpatient Only list in your MAC jurisdiction; if performed inpatient, ensure medical necessity supports admission

Live Field Datano reports yet

Real billers contribute denial patterns and appeal strategies for this code. Once 5+ reports come in, you’ll see live aggregated data here — the only place this exists, free.

Working with CPT 23066?

Get the free Revenue Protection Toolkit — the denial triggers, modifier pitfalls, and bundling conflicts that quietly cost you reimbursement. Instant download.

Help build the field knowledge

MedPayIQ gets smarter as billers contribute. If you've had this code denied, share what happened so others learn from it. Anonymous, no patient info.

Related actions

Frequently asked questions

What is the Medicare reimbursement for CPT code 23066 in 2025?

Medicare pays $562.83 for CPT 23066 when performed in a non-facility setting (physician office with equipment) and $370.69 when performed in a facility setting (hospital or ASC) based on 2025 national average rates. Actual payment varies by geographic locality using the GPCI adjustment factors.

What is the difference between CPT 23066 and 20206?

CPT 23066 is specifically for deep shoulder tissue biopsy requiring dissection through muscle, fascia, or joint structures, while 20206 is for superficial soft tissue biopsy in any location at subcutaneous level or above. The key differentiator is anatomic depth and complexity; 23066 reimburses at $562.83 versus 20206 at approximately $247.59 non-facility.

Does CPT 23066 require a modifier for left or right shoulder?

Yes, CPT 23066 requires laterality modifiers LT (left) or RT (right) to indicate which shoulder was biopsied. Medicare and most payers will reject or deny claims for 23066 without appropriate laterality designation as this is a bilateral anatomic code.

Can CPT 23066 be billed with an E/M code on the same day?

Generally no, unless there is a separately identifiable evaluation and management service unrelated to the decision for surgery, documented with modifier 25. For surgical procedures like 23066, the decision for surgery is typically made in a prior visit, and same-day E/M would be bundled into the surgical payment.

What diagnosis codes support medical necessity for CPT 23066?

Appropriate diagnoses include neoplasm of uncertain behavior shoulder (D48.1), primary bone/soft tissue neoplasms (C40-C41, C49.3), shoulder mass (M79.89), chronic synovitis (M65.80-M65.82), osteomyelitis requiring tissue diagnosis (M86.80-M86.89), and specific tumor codes. Avoid unsupported pain codes like M25.511 which often result in medical necessity denials.

How many RVUs is CPT code 23066 worth in 2025?

CPT 23066 has a total RVU value of 17.4, comprised of 4.3 work RVUs, 12.2 non-facility practice expense RVUs (6.26 facility PE RVUs), and 0.9 malpractice RVUs. This represents a moderate complexity surgical procedure with significant practice expense for equipment and supplies.

Can CPT 23066 be billed bilaterally with modifier 50?

Yes, if bilateral shoulder biopsies are medically necessary and performed during the same operative session, modifier 50 can be appended. Medicare typically reimburses bilateral procedures at 150% of the unilateral allowable, resulting in approximately $843.45 non-facility payment, though medical necessity for simultaneous bilateral biopsies must be clearly documented.