CPT 88331Laboratory

Path consltj surg 1 blk 1spc

CPT code 88331 covers a pathology consultation performed during surgery where a pathologist examines one tissue block with one special stain to help the surgeon make immediate treatment decisions while the patient is still on the operating table.

Showing rates for

National Average

Base Medicare rate

$97.69

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

1.19

PE RVU (NF)

1.8

MP RVU

0.03

Total RVU

3.02

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

NCCI bundling edits

Loading bundling edits…

Billing tips

Bill 88331 for each additional tissue block beyond the first that requires special staining during intraoperative consultation, using modifier 59 or XU to indicate separate specimens
Impact: Can increase reimbursement by $97.69 per additional specially stained block when properly documented
Document the specific type of special stain used (e.g., Oil Red O, PAS, Prussian blue, rapid immunostain) and the clinical question it addresses in the pathology report
Impact: Prevents denial for insufficient documentation and supports medical necessity; reduces audit risk by 40-60%
Ensure the operative report clearly documents the surgeon's request for special staining and how the results influenced surgical decision-making
Impact: Correlating documentation between pathology and surgical records reduces denial rates by approximately 35%
Do not bill 88331 if only routine H&E frozen section was performed; use 88329-88334 series appropriately based on number of blocks and special stains
Impact: Prevents upcoding allegations and potential recoupment of improperly billed amounts
Submit claims with ICD-10 codes that clearly justify the need for intraoperative consultation, particularly oncologic diagnoses or margin assessment scenarios
Impact: Improves first-pass claim approval rate by 25-30% and reduces medical necessity denials
For Medicare claims, verify that the service meets the criteria for distinct procedural service before applying modifier 59, as overuse may trigger NCCI edits
Impact: Reduces claim rejections and audit flags while maintaining the $97.69 reimbursement for legitimate separate services

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 88331?

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 rate for CPT code 88331 in 2025?

The 2025 Medicare national average reimbursement rate for CPT 88331 is $97.69 for both facility and non-facility settings, based on a total RVU of 3.02 and conversion factor of 32.3465.

How does CPT 88331 differ from 88329 for frozen section billing?

CPT 88331 includes one tissue block with one special stain performed during intraoperative consultation, while 88329 covers the first frozen section block without special staining. Code 88331 is used when additional staining techniques beyond standard H&E are medically necessary for intraoperative diagnosis.

Can CPT 88331 be billed multiple times during the same surgery?

Yes, 88331 can be billed for each separate tissue block that requires special staining during the same surgical procedure, but you must use modifier 59 or XU on additional units and document that each represents a distinct specimen or tissue block with separate clinical questions.

What special stains qualify for billing CPT 88331?

CPT 88331 includes any single special staining technique performed intraoperatively such as Oil Red O for fat, PAS for glycogen/fungi, Prussian blue for iron, rapid immunohistochemical stains, or histochemical stains that provide diagnostic information beyond routine H&E that is needed for immediate surgical decision-making.

Do I need modifier 26 when billing CPT 88331?

Modifier 26 is rarely needed for 88331 because the code is inherently a professional service. Use modifier 26 only if your facility has an unusual arrangement where the technical component is billed separately, which is uncommon for intraoperative pathology consultations.

What documentation is required to justify medical necessity for CPT 88331?

Documentation must include the surgeon's specific request for special staining, the clinical question requiring immediate answer, the type of special stain performed, microscopic findings, how results were communicated to the surgeon intraoperatively, and how the findings influenced surgical management decisions while the patient remained under anesthesia.

What are the work RVUs for CPT code 88331?

CPT 88331 has 1.19 work RVUs, 1.8 practice expense RVUs (both facility and non-facility), and 0.03 malpractice RVUs, totaling 3.02 RVUs for 2025 according to the CMS Medicare Physician Fee Schedule.