G9430 Specimen Non-Cutaneous Site Reimbursement

HCPCS Level II code G9430 identifies a specimen site that is not an anatomic cutaneous location. Nationally, accurate coding of specimen sites supports correct laboratory and pathology reporting, ensures consistent clinical documentation, and affects downstream claims processing for non-cutaneous specimen handling. This code is relevant across payers for encounters involving biopsies, surgical specimen submissions, or other diagnostic tissue collections from mucosal, internal organ, or other non-skin sites.

Key payers covered include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the codes clinical meaning, typical service context, and payer relevance. The publication outlines how G9430 is applied in practice, highlights common billing modifiers and operational considerations where data is available, and summarizes any notable policy or documentation implications. Benchmarks and payer-specific coverage determinations are addressed where accessible; when detailed payer policy information is not provided, the report notes that data is not available in the input.

Billing Code Overview

HCPCS Level II code G9430 denotes a specimen site other than anatomic cutaneous location. This code is used to indicate procedures or specimen collections that are taken from non-cutaneous anatomical sites.

Service type: Specimen collection or pathology specimen designation from a non-cutaneous site
Typical site of service: Non-cutaneous anatomical locations (for example, mucosal, internal organ, or other non-skin sites)

Data not available in the input.

Clinical Context

A patient presents to an outpatient dermatology clinic or ambulatory surgical center for biopsy of a lesion located at a non-cutaneous specimen site (for example, mucosal sample from the oral cavity, nasal mucosa, conjunctiva, or genital mucosa). The patient is a 52-year-old with a persistent ulcerated lesion of the oral mucosa, failing empiric topical therapy, and the clinician elects to obtain a targeted biopsy for histopathology and culture. The workflow includes pre-procedure consent and site verification, local anesthesia (topical or local infiltration), either punch or excisional biopsy technique adapted to the mucosal surface, specimen preservation in appropriate media (formalin for histology, transport media for microbiology if indicated), labeling with anatomic site and laterality, and submission to pathology. Documentation includes the lesion description, anatomic site (mucosal/other non-cutaneous), size, procedure performed, anesthesia type, and specimens sent. Billing uses G9430 to indicate a specimen site other than anatomic cutaneous location when reporting site-specific reporting for quality or registry purposes; the clinical encounter may also generate CPT codes for the biopsy procedure itself and relevant ICD-10 diagnosis codes for the lesion sampled.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work or complexity of the biopsy is substantially greater than typical and documented.

Taxonomy Code	Specialty	Notes
`2080P0206X`	Dermatology	Dermatologists commonly perform mucosal and cutaneous biopsies when indicated.
`208800000X`	Otolaryngology (ENT)	ENT specialists perform biopsies of nasal, oral, or pharyngeal mucosal lesions.
`207L00000X`	Ophthalmology	Ophthalmologists perform conjunctival or periocular mucosal biopsies.
`207Q00000X`	Urology	Urologists perform genital mucosal biopsies (urethral or penile) when indicated.
`207K00000X`	General Surgery	General surgeons may biopsy mucosal lesions in head/neck or GI-adjacent sites in operative settings.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`K13.0`	Glossitis and stomatitis	Mucosal inflammatory lesions of the oral cavity that may require biopsy to exclude dysplasia or infection.
`K13.79`	Other diseases of lip and oral mucosa	Miscellaneous mucosal lesions prompting biopsy for diagnosis.
`J34.89`	Other specified disorders of nose and nasal sinuses	Nasal mucosal lesions or masses that may be biopsied for histologic diagnosis.
`H11.39`	Other conjunctival disorders	Conjunctival lesions suspicious for neoplasm or chronic inflammatory disease requiring biopsy.
`N48.6`	Other specified inflammatory disorders of penis	Penile mucosal or genital lesions sampled for infection, inflammatory disease, or neoplasm.
`R22.2`	Localized swelling, mass and lump, trunk	Applies when a palpable non-cutaneous lesion in anatomic site other than cutaneous needs tissue diagnosis.
`D04.9`	Carcinoma in situ of skin, unspecified	Used when mucosal in-situ neoplasia is suspected and biopsy is required to confirm.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`11102`	Tangential biopsy of skin (e.g., shave, scoop), single lesion; simple, without closure	Performed when a superficial mucosal or cutaneous lesion requires a tangential biopsy; may be used when lesion depth is superficial.
`11104`	Punch biopsy of skin, single lesion	Common technique for mucosal or small lesion sampling when a full-thickness punch is suitable; used at the time of specimen collection.
`11400`	Excision, benign lesion including margins, face, ears, eyelids, nose, mucous membrane; excised diameter 0.5 cm or less	Used when a small benign-appearing mucosal lesion is excised entirely and sent as a specimen from a non-cutaneous site.
`12001`	Simple repair of superficial wound; 2.5 cm or less	May be used for closure of biopsy sites on mucosal or adjacent skin if simple repair is performed after the biopsy.
`99213`	Office or other outpatient visit for evaluation and management, established patient, low to moderate complexity	Typical E/M service reported for pre-procedure evaluation or follow-up after biopsy if separate and significant.

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Summary & Overview

HCPCS G9430: Specimen Site Other Than Cutaneous Location