Summary & Overview
CPT 84119: Urine Porphyrins Test, Laboratory Analysis
CPT code 84119 represents a laboratory diagnostic assay for the detection of porphyrins, commonly performed on a random urine specimen. Porphyrin testing plays a role in diagnosing disorders of heme synthesis, such as porphyria, and can guide further clinical evaluation. Nationally, porphyrin testing is a specialized laboratory service with implications for diagnostic workflows, utilization management, and coverage determinations 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 the clinical purpose of the test, typical sites of service, and the payer landscape considered. The publication outlines benchmarking context and common billing practices related to this CPT code, summarizes relevant policy considerations affecting laboratory diagnostic services, and provides clinical context to help payers and providers understand when this service is used. Data not available in the input is noted where applicable. The content is intended for a national audience and focuses on what the code represents, who covers it, and what documents and policy elements are relevant to its use.
Billing Code Overview
CPT code 84119 describes a laboratory analysis that evaluates the presence of porphyrins in a patient specimen, typically performed on a random urine sample. This test is used to detect abnormal porphyrin levels that can indicate disorders of heme biosynthesis, including porphyria and related metabolic conditions.
Service Type: Laboratory diagnostic test
Typical Site of Service: Clinical laboratory or hospital outpatient laboratory
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult presenting to primary care or the emergency department with unexplained abdominal pain, neuropsychiatric symptoms (confusion, neuropathy, acute behavioral changes), photosensitivity, or a history suggestive of acute or chronic porphyrias. A clinician orders porphyrin testing to evaluate urinary porphyrins as part of a diagnostic workup for porphyria or to assess for porphyrinuria related to hepatic dysfunction, lead exposure, or cutaneous photosensitivity disorders. A random urine specimen is collected in a sterile container and sent to the clinical laboratory. The laboratory analyst performs qualitative and/or quantitative assays for urinary porphyrins using spectrophotometric, fluorometric, or chromatographic methods. Results are reported to the ordering clinician and interpreted in conjunction with clinical findings and other tests (e.g., delta-aminolevulinic acid, porphobilinogen). Typical sites of service include hospital laboratories, independent clinical laboratories, outpatient clinic labs, and reference laboratories. Billing for the analytical component of the urine porphyrin test uses 84119.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When billing only the professional interpretation component separate from technical work |
52 | Reduced services | When the lab performs a limited or partial porphyrin assay compared to the full-panel test |
53 | Discontinued procedure | When specimen collection or testing is started but abandoned for documented clinical reasons |
59 | Data not available in the input. | Data not available in the input. |
90 | Reference (outside) lab | When the specimen is sent to an outside/reference laboratory and billing requires the reference lab modifier |
TC | Technical component | When billing only the technical component (laboratory processing and analysis) |
91 | Data not available in the input. | Data not available in the input. |
22 | Increased procedural services | When complexity or extra work increases resource use for the porphyrin assay |
52 | Data not available in the input. | Data not available in the input. |
90 | Data not available in the input. | Data not available in the input. |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207Q00000X | Clinical Laboratory Technologist | Performs or directs laboratory testing and reporting |
2085R0200X | Clinical Pathology | Pathologists who oversee laboratory testing, interpretation, and quality control |
201R00000X | Family Medicine | Clinicians who commonly order porphyrin testing in primary care settings |
207L00000X | Medical Technologist | Laboratory personnel who perform analytical testing |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
E80.20 | Porphyria, unspecified | Direct indication for urine porphyrin testing to establish subtype and activity |
E80.21 | Acute intermittent porphyria | Acute attacks require measurement of urinary porphobilinogen, delta-ALA, and porphyrins |
E80.22 | Hereditary coproporphyria | Chronic or acute presentations prompt urine porphyrin analysis |
E80.23 | Variegate porphyria | Clinical photosensitivity and neurovisceral symptoms lead to porphyrin testing |
T56.0X5A | Toxic effect of lead, initial encounter | Lead poisoning can cause elevated urinary porphyrins; testing helps evaluate exposure effects |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
82565 | Blood lead; venous | Evaluated when porphyrin elevations suggest lead exposure causing elevated porphyrins or neurologic symptoms |
82607 | Porphobilinogen; urine | Often ordered alongside urine porphyrins to evaluate for acute intermittent porphyria and acute porphyric attacks |
82572 | Delta-aminolevulinic acid (ALA); urine | Ordered with urine porphyrins and porphobilinogen to assess for acute porphyrias |
81002 | Urinalysis, non-automated, without microscopy | Initial urine assessment and specimen adequacy check prior to specialized porphyrin testing |
82570 | Pyrroles (urotropin), urine | Alternative or adjunct test for porphyrin-related disorders and neuropsychiatric symptom evaluation |