CPT 88305Laboratory

Tissue exam by pathologist

CPT 88305 covers the pathologist's examination of tissue samples removed during biopsies or surgical procedures. This is the most frequently billed pathology code and applies to routine tissue specimens like skin biopsies, polyps, and small lesions.

Showing rates for

National Average

Base Medicare rate

$69.54

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

0.75

PE RVU (NF)

1.38

MP RVU

0.02

Total RVU

2.15

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

NCCI bundling edits

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Billing tips

Bill one unit of 88305 per specimen submitted in a separate container with unique anatomic site identification, not per slide or block
Impact: Proper specimen counting can increase revenue by 200-400% when multiple sites are biopsied; each separately labeled container qualifies as one unit
Ensure surgical pathology requisition clearly documents each specimen's anatomic source and clinical indication before accessioning
Impact: Reduces denial risk by 35-50%; Medicare and commercial payers require specific anatomic site documentation to support multiple units
Do not bill 88305 with 88304 or 88307 for the same specimen; use the code representing the highest complexity level for that specimen
Impact: Prevents automatic denials and potential fraud flags; always code to the most complex examination performed
Use modifier 59 when billing multiple units of 88305 on same date to indicate distinct specimens from different anatomic sites
Impact: Prevents NCCI bundling edits that could deny 50-100% of additional specimen charges; essential for multiple biopsy sessions
Verify that specimen complexity truly matches 88305 criteria versus 88304 or 88307; skin tags and simple cysts are 88304, while complex resections are 88307
Impact: Coding one level too high or low affects reimbursement by $30-100 per specimen and increases audit risk significantly
For prostate biopsies, confirm payer policy on per-specimen versus per-case billing; some payers bundle all cores into one unit while Medicare allows per-container billing
Can affect revenue by $500-1000 per prostate biopsy case depending on number of cores and payer policy interpretation

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 88305 in 2025?

The 2025 Medicare national average payment rate for CPT 88305 is $69.54 for both facility and non-facility settings. This is based on 2.15 total RVUs (0.75 work RVU, 1.38 PE RVU, 0.02 MP RVU) multiplied by the 2025 conversion factor of 32.3465. Actual payment may vary by geographic locality.

How many times can you bill 88305 on the same day?

You can bill 88305 multiple times on the same day based on the number of separately submitted specimens from distinct anatomic sites, each in its own labeled container. Use modifier 59 on additional units to indicate distinct specimens. Medicare and most payers recognize per-specimen billing, not per-block or per-slide billing.

What is the difference between CPT 88304 and 88305?

88304 is Level III surgical pathology for simpler specimens like skin tags, hemorrhoids, and simple cysts requiring minimal microscopic examination. 88305 is Level IV for intermediate complexity specimens like skin biopsies with diagnosis, colon polyps, and prostate biopsies requiring more extensive evaluation. The reimbursement difference is approximately $30-40 per specimen.

Does CPT 88305 include both gross and microscopic examination?

Yes, 88305 is a global code that includes gross examination, tissue processing, preparation of slides, microscopic examination, and the pathologist's written diagnostic report. You cannot separately bill for these individual components when performing 88305.

Can you bill 88305 for multiple prostate biopsy cores?

Yes, Medicare allows billing one unit of 88305 for each separately submitted prostate biopsy specimen container. If each core or group of cores from specific anatomic sites is submitted in separate containers with distinct labels, each qualifies as a billable unit. However, verify individual payer policies as some commercial payers may have different bundling rules.

What specimens are included in CPT 88305?

88305 includes specimens such as skin biopsies, colon polyps, prostate needle biopsies, breast biopsies without sentinel lymph nodes, endometrial curettings, lymph nodes for staging, soft tissue tumors under 5cm, bone marrow biopsy, kidney biopsies, nasal polyps, and many other intermediate-complexity tissues listed in the CPT codebook's 88305 descriptor.

Do you need a modifier when billing 88305 with an E/M service?

No, 88305 does not typically require modifier 25 when billed with E/M services because it is a diagnostic test, not a procedure subject to E/M bundling. However, 88305 is usually billed by the pathologist or laboratory, not the physician performing the biopsy or seeing the patient for E/M services, so they are separate claims from different providers.