Summary & Overview
CPT 87205: Gram or Giemsa Stain on Primary Source, Technical Interpretation
CPT code 87205 represents a technical laboratory procedure involving Gram or Giemsa staining of a primary specimen with microscopic interpretation to detect bacteria, fungi, or cellular elements. This code is a routine diagnostic tool in infectious disease workups and cytologic assessments, supporting timely clinical decision-making and infection control measures. Nationally, its use affects laboratory workflow, coding accuracy, and payment processes across public and private payers.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of service definitions and typical sites of service, payer coverage patterns and common modifiers used with the code, and clinical context for when the stain is applied. The publication also outlines benchmarks and reimbursement considerations relevant to labs and hospital billing offices, and highlights policy updates that impact claim adjudication and documentation expectations.
The report is intended for billing managers, laboratory directors, and compliance teams seeking a focused reference on coding, payer interactions, and the clinical role of Gram/Giemsa staining under CPT code 87205. Data not available in the input will be noted where applicable.
Billing Code Overview
CPT code 87205 describes a technical laboratory test that uses a Gram or Giemsa stain on a primary source to detect and help identify bacteria, fungi, or cell types, with interpretation performed by the analyst. The procedure involves preparing and staining a specimen obtained from a primary clinical source and examining the stained slide microscopically to report findings.
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Service type: Laboratory diagnostic staining and microscopic interpretation
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Typical site of service: Clinical laboratory, hospital laboratory, or other certified laboratory setting
Clinical & Coding Specifications
Clinical Context
A 45-year-old adult presents to an urgent care clinic with a 2-day history of purulent eye discharge, eyelid swelling, and conjunctival erythema. A primary care physician performs an ocular surface swab at the bedside and sends a slide-prepared specimen to the laboratory for a Gram stain with interpretation to identify bacterial organisms and guide empiric therapy. The clinical workflow: specimen collection from the primary source (conjunctival swab), slide preparation and fixation in the clinic or outpatient lab, transport to the microbiology laboratory, technical staining by a laboratory analyst using Gram stain (or Giemsa stain when indicated), microscopic examination, documentation of organism morphology (gram-positive cocci in clusters vs gram-negative rods), and a written or electronic interpretive report returned to the ordering clinician for treatment decisions. Typical sites of service include outpatient clinic, urgent care, emergency department, and hospital laboratory when rapid organism morphology is required for initial management. This procedure is a technical laboratory test performed by a diagnostic laboratory analyst and includes interpretation documented in the laboratory report.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when the interpreting pathologist/laboratory physician bills separately for the interpretation portion of the service. |