88305

Level IV - Surgical pathology, gross and microscopic examination

CPT code 88305 represents a Level IV surgical pathology service, involving both gross and microscopic examination of a surgical specimen. This level is characterized by moderate complexity and typically applies to common biopsies and excisions where definitive diagnosis often requires microscopic evaluation of multiple tissue sections. The pathologist performs a macroscopic (gross) examination of the specimen, describing its features, dimensions, and relationship to margins if applicable. Following gross examination, appropriate tissue sections are selected, processed, embedded, and cut into microscopic slides. The pathologist then performs a microscopic examination of these slides to identify cellular and architectural changes, render a diagnosis, and provide prognostic and predictive information as needed. This code is reported per specimen.

Clinical Indications

  • Diagnosis and grading of common neoplasms (e.g., basal cell carcinoma, squamous cell carcinoma, routine breast biopsies, colon polyps)
  • Evaluation of inflammatory conditions (e.g., appendicitis, cholecystitis, inflammatory bowel disease biopsies)
  • Assessment of resection margins for tumor involvement
  • Confirmation of benign lesions and cysts
  • Pathological evaluation of routine gynecological specimens (e.g., endometrial biopsies, cervical conization)
  • Diagnosis of conditions affecting organs such as gallbladders, appendices, tonsils, or routine prostate biopsies

Procedure Steps

  1. Specimen receipt and accessioning: The surgical specimen is received in the pathology laboratory, verified against the requisition, and assigned a unique identification number.
  2. Gross examination: A pathologist or pathology assistant macroscopically examines the specimen, describes its physical characteristics (size, shape, color, consistency), identifies anatomical structures, and dictates relevant findings.
  3. Tissue sectioning and submission: Based on the gross findings, representative sections of tissue are carefully selected, oriented, and submitted into labeled cassettes for processing.
  4. Tissue processing: The tissue in cassettes undergoes a series of steps including fixation, dehydration, clearing, and impregnation with paraffin wax.
  5. Paraffin embedding: The processed tissue is embedded in a block of paraffin wax, which provides structural support for sectioning.
  6. Microtomy: Thin sections (typically 3-5 micrometers) are cut from the paraffin block using a microtome and mounted onto glass slides.
  7. Staining: The tissue sections on slides are routinely stained with Hematoxylin and Eosin (H&E) to highlight cellular and architectural details.
  8. Microscopic examination: A board-certified pathologist examines the stained slides under a microscope, interprets the cellular and tissue morphology, correlates findings with clinical information, and formulates a diagnosis.
  9. Pathology report generation: A comprehensive report is generated, detailing gross findings, microscopic description, and the final diagnosis.

Coding Guidelines

  • Code 88305 is reported per specimen. A 'specimen' is defined as tissue or tissues that is submitted for individual and separate examination and pathologic diagnosis.
  • If multiple individual specimens are removed during a single surgical procedure and each requires separate gross and microscopic examination, 88305 should be reported for each specimen. For example, a gallbladder and an appendix removed during the same surgery would be coded as 88305 x 2.
  • This code includes the technical preparation (gross examination, tissue processing, slide preparation) and the professional component (microscopic examination, diagnosis, report generation).
  • Special stains (e.g., immunohistochemistry, histochemical stains) are reported separately with codes 88312-88314, 88342, 88344, 88360-88361, or 88365 when performed in addition to the routine H&E staining included in 88305.
  • Consultations (e.g., second opinions on slides from another institution) are reported with codes 88321-88325 and should not be confused with the primary interpretation of a new specimen.
  • Documentation must clearly specify the type of specimen, the gross description, the microscopic findings, and the final diagnosis.
  • Frozen sections performed intraoperatively are typically reported with code 88331 or 88332 and are separate from the final permanent section diagnosis (88305).

Associated ICD-10 Codes