Summary & Overview

CPT 88323: Pathology Consultation and Slide Preparation

CPT code 88323 represents a pathology consultation on referred material, where a qualified pathologist reviews tissue blocks or other material, prepares and stains slides as necessary, and issues a consultation report. This code is used nationally for cases where diagnostic expertise is sought on specimens originating from another facility or service line and is important for accurate diagnosis, continuity of care, and appropriate downstream clinical management. Key payers in standard analyses include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will learn the clinical context for use of CPT code 88323, typical sites of service, and common operational considerations tied to specimen receipt, slide preparation, and reporting workflows. The publication also covers benchmarking and policy-relevant points such as payer coverage considerations and coding practice implications where available. Data not available in the input is noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 88323pathologysurgical pathologyconsultationslide preparationlaboratory servicesspecimen referraldiagnostic pathology

Billing Code Overview

CPT code 88323 describes a pathology consultation on referred material, typically performed by a qualified pathologist. The service includes review of a referred specimen or tissue block, preparation and staining of slides as needed, and issuance of a consultation report reflecting the pathologist's findings and opinions.

Service Type: Pathology consultation and slide preparation

Typical Site of Service: Hospital pathology laboratory, independent pathology laboratory, or outpatient surgical pathology facility

Clinical & Coding Specifications

Clinical Context

A typical patient scenario involves a community surgeon or dermatologic clinician who has excised a lesion and submits the paraffin-embedded tissue block or unstained slides to a pathology laboratory for expert review. A pathologist performs a consultative case review that may include preparing and staining additional slides from a received block, microscopic examination, and issuance of a diagnostic report. The workflow often begins when a specimen is sent from an outside facility or when subspecialty review is requested by the treating provider. The laboratory accessioning team documents receipt, the histology staff prepares and stains required sections, and a pathologist interprets the findings and generates a consultation report. The unit of service for 88323 is the surgical case, and billing is typically performed by the consulting pathologist for a single referred case, regardless of the amount of material received. Typical sites of service include hospital-based pathology laboratories, independent reference pathology laboratories, and outpatient surgical centers that send material for external pathology consultation.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when reporting only the professional component of a service if the technical component is billed separately by another entity.
`59`	Distinct procedural service	Use when another procedure or service on the same day is separate and distinct from the consultative pathology service and needs clarification of billing.
`78`	Return to the operating room for a related procedure during the postoperative period	Rarely used directly with consultation codes; may be appended if the consultation is related to a return-to-OR event that affects billing context.
`80`	Assistant at surgery	Use when an assistant surgeon is involved in the primary surgical procedure that generated the specimen; clarifies roles but not commonly appended to pathology consultations.
`90`	Reference (outside) laboratory	Use when portions of the pathology service are performed by an outside reference laboratory.
`TC`	Technical component	Use when billing only the technical component (laboratory processing, staining) and the professional component is billed separately.
`QK`	Medical direction of two to four ancillary personnel	Use when the reporting pathologist medically directs multiple laboratory staff during preparation or special studies.
`QX`	Modifier for assistant at surgery when assistant surgeon requirements are met	Similar contextual use as `80` when needed for payer adjudication.
`GZ`	Unbundled service expected to be paid only if documentation supports medical necessity	Use when documentation is incomplete or when the service is provided without expected prior authorization.
`GC`	Service performed in part by a resident, teaching physician not present	Use when a resident performed parts of the consultative tasks with a teaching physician countersigning.

Taxonomy Code	Specialty	Notes
`207K00000X`	Anatomic Pathology	Primary specialty performing consultative surgical pathology services.
`207L00000X`	Clinical Pathology	Often associated when laboratory technical aspects or consults cross into clinical laboratory interpretation.
`208100000X`	Dermatopathology	Subspecialty frequently providing consults on skin excisions and specialized stains.
`207P00000X`	Hematopathology	Relevant when the referred material involves lymphoid or bone marrow specimens requiring specialized review.
`2086S0127X`	Surgical Pathology	Pathologists focused on surgical specimen diagnosis and consultation.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`C44.9`	Malignant neoplasm of skin, unspecified	Common indication for excisional biopsy specimens referred for pathologic consultation and review.
`D48.5`	Neoplasm of uncertain behavior of skin	Applies to lesions where definitive classification requires specialist pathologic review.
`K02.9`	Dental caries, unspecified	Oral/maxillofacial specimens submitted for histopathology after excision or biopsy may require consultation.
`N40.0`	Benign prostatic hyperplasia	Core or transurethral resection specimens sometimes undergo consultative review for concurrent pathology.
`R22.2`	Localized swelling, mass and lump of trunk	Biopsy specimens from masses submitted for surgical pathology consultation to establish diagnosis.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`88305`	Level IV surgical pathology, gross and microscopic examination	Common primary surgical pathology code for initial diagnostic examination of tissue; `88323` may be billed when materials are referred for consultation after initial processing.
`88342`	Immunohistochemistry, each antibody (single or multiplex)	Often performed after consultation to clarify diagnosis; may be ordered by the consulting pathologist.
`88331`	Special staining, per specimen; initial single stain	Special stains prepared by histology during consultative review and billing coordination with `88323`.
`88360`	Morphometric analysis, quantitative, per specimen	Used when additional quantitative analysis is needed following the consultative review.
`88329`	Pathology consultation during surgery (intraoperative)	Intraoperative frozen section consultation differs from `88323` which is a referral consult on prepared material; both can be part of the same patient episode.