CPT® Code 84061

Official Description

Phosphatase, acid; forensic examination

Common Language Description

Acid phosphatase mapping is a laboratory procedure that focuses on the detection of acid phosphatase, an enzyme that is predominantly found in prostatic fluid. This enzyme serves as a significant biomarker for identifying the presence of semen, making it particularly useful in forensic investigations, especially in cases of sexual assault. The procedure involves analyzing swabs taken from victims or stains found on various materials such as clothing and bedding. The presence of prostatic acid phosphatase (PAP) indicates the likelihood of seminal fluid, as this enzyme is specific to the prostate gland and is a key component of semen. Forensic testing can be conducted using established methods such as the modified Fishman or Lerner techniques, or through isoenzyme analysis, which allows for a more precise identification of the source of the fluid. This testing is not only cost-effective but also provides reliable results that can be critical in legal contexts.

1. Indications

Acid phosphatase mapping is indicated for the following situations:

Sexual Assault Investigations This procedure is performed to identify the presence of semen on swabs collected from victims of sexual assault.
Fluid Stain Analysis It is utilized to detect semen stains found on clothing and bedding, which may be relevant in forensic cases.

2. Procedure

The procedure for acid phosphatase mapping involves several key steps to ensure accurate detection of the enzyme associated with seminal fluid.

Sample Collection Swabs are collected from the victim or from surfaces where stains are suspected to be present. These samples are crucial for the subsequent analysis.
Testing Method Selection The laboratory may choose between different testing methods, such as the modified Fishman method, the Lerner method, or isoenzyme techniques, depending on the specific requirements of the case.
Enzyme Detection The selected method is employed to detect the presence of acid phosphatase in the samples. This involves chemical reactions that indicate the enzyme's activity, confirming the presence of seminal fluid.
Result Interpretation The results are analyzed and interpreted by qualified personnel, who assess the presence and concentration of acid phosphatase to determine if semen is present in the sample.

3. Post-Procedure

After the acid phosphatase mapping procedure, the samples are typically disposed of according to laboratory protocols, ensuring that any biological materials are handled safely. The results of the testing are documented and reported to the appropriate authorities or legal entities involved in the investigation. It is important for the findings to be communicated clearly, as they may play a critical role in legal proceedings. Follow-up actions may include further testing or analysis based on the results obtained, and any necessary documentation should be maintained for compliance and record-keeping purposes.

Short Descr	PHOSPHATASE FORENSIC EXAM
Medium Descr	PHOSPHATASE ACID FORENSIC EXAMINATION
Long Descr	Phosphatase, acid; forensic examination
Status Code	Statutory Exclusion (from MPFS, may be paid under other methodologies)
Global Days	XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC)	9 - Not Applicable
Multiple Procedures (51)	9 - Concept does not apply.
Bilateral Surgery (50)	9 - Concept does not apply.
Physician Supervisions	09 - Concept does not apply.
Assistant Surgeon (80, 82)	9 - Concept does not apply.
Co-Surgeons (62)	9 - Concept does not apply.
Team Surgery (66)	9 - Concept does not apply.
Diagnostic Imaging Family	99 - Concept Does Not Apply
APC Status Indicator	Conditionally packaged laboratory tests
Type of Service (TOS)	5 - Diagnostic Laboratory
Berenson-Eggers TOS (BETOS)	T1H - Lab tests - other (non-Medicare fee schedule)
MUE	Not applicable/unspecified.
CCS Clinical Classification	233 - Laboratory - Chemistry and Hematology