CPT 88300Laboratory

Surgical path gross

CPT code 88300 covers the basic examination of a surgical specimen by a pathologist using only the naked eye (gross examination), without preparing slides for microscopic review. This is the simplest level of surgical pathology examination.

Showing rates for

National Average

Base Medicare rate

$16.17

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

0.08

PE RVU (NF)

0.4

MP RVU

0.02

Total RVU

0.5

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

NCCI bundling edits

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Billing tips

Verify medical necessity before billing 88300 - many specimens that appear to qualify actually require microscopic examination and should be coded to higher-level pathology codes (88302-88309)
Impact: Prevents underbilling that can cost $50-$300+ per specimen when microscopic exam is performed but not billed
Document the specific reason why gross-only examination is sufficient and why microscopic evaluation was not medically necessary
Impact: Reduces denial risk by 60-70% when medical necessity is questioned; prevents downcoding from higher-level pathology codes
Do not bill 88300 for specimens that are examined and then discarded without a formal pathology report - no report means no billable service
Impact: Prevents 100% denials and potential fraud allegations; Medicare requires a formal written pathology report for reimbursement
Bill only once per specimen regardless of the number of pieces or fragments unless they represent distinct anatomic sites requiring separate examination
Impact: Prevents bundling denials and compliance issues; improper multiple billing can trigger $16.17+ takebacks per improper claim
Coordinate with dental practices when billing 88300 for tooth specimens - verify that the extraction code doesn't include pathology examination
Impact: Prevents duplicate billing denials; many dental extraction codes bundle pathology, making 88300 non-billable
For placentas from uncomplicated deliveries, confirm payer policy - some commercial payers deny 88300 as not medically necessary for routine deliveries
Reduces denial rate by 40-50% on placenta examinations; obtaining advance ABN when appropriate protects $16.17 payment

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 88300 in 2025?

The 2025 Medicare national average payment for CPT 88300 is $16.17 for both facility and non-facility settings. This rate is based on 0.5 total RVUs (0.08 work RVU, 0.4 practice expense RVU, 0.02 malpractice RVU) multiplied by the 2025 conversion factor of 32.3465.

When should I use CPT 88300 versus 88302 or higher pathology codes?

Use 88300 only when the pathologist performs gross examination alone without any microscopic evaluation. If tissue is processed, slides are prepared, or microscopic examination occurs, you must use 88302-88309 based on specimen complexity. Common 88300 specimens include teeth, simple placentas, and foreign bodies where visual inspection suffices for diagnosis.

Can I bill multiple units of 88300 for the same patient on the same day?

Yes, but only if examining truly distinct specimens from separate anatomic sites or separate surgical events. Each specimen must have its own pathology report and medical necessity justification. Use modifier 59 or XS to indicate distinct services. Billing multiple units for fragments of the same specimen is incorrect and will be denied as duplicate billing.

Do I need a written pathology report to bill CPT 88300?

Yes, absolutely. Medicare and commercial payers require a formal written pathology report signed by the pathologist for any pathology code including 88300. The report must include specimen description, clinical information, gross findings, and diagnosis. Verbal reports or informal notes do not support billing.

Is CPT 88300 bundled with surgical procedure codes?

It depends on the specific procedure and payer policy. 88300 is generally separately billable from most surgical procedures, but some dental extraction codes and certain minor procedures may bundle pathology examination. Always check CCI edits and individual payer policies before billing. When bundled, modifier 59 will not override the edit.

What RVU value is assigned to CPT code 88300?

CPT 88300 has a total RVU of 0.5 for 2025, consisting of 0.08 work RVU, 0.4 practice expense RVU (both facility and non-facility), and 0.02 malpractice RVU. This is among the lowest RVU values in pathology codes, reflecting the minimal work and resources required for gross-only examination.

Can pathology assistants perform and bill for CPT 88300 services?

Pathology assistants can perform the gross examination under pathologist supervision, but the pathologist must review findings and sign the final report for billing purposes. The service is billed under the supervising pathologist's NPI. Pathology assistants cannot independently bill for pathology services; the pathologist is the qualified healthcare professional for CPT pathology codes.