Summary & Overview
CPT 0108T: Cold Sensation and Pain Threshold Testing
CPT code 0108T describes a quantitative sensory testing procedure that determines cold sensation and pain thresholds by stimulating the skin of an extremity and comparing responses to normative values. This assessment targets small-fiber sensory function and is used in diagnosing peripheral neuropathies and other conditions that damage small nerve endings. The code matters nationally as clinicians and payers evaluate coverage and appropriate use of specialized sensory testing for diagnostic clarity in complex neuropathic presentations.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical intent and typical sites of service, common billing considerations, and national benchmarking context where available. The publication outlines what constitutes the service, clinical scenarios prompting testing, and the diagnostic value of quantifying cold detection and pain thresholds.
This summary also indicates areas where input data was not provided. Sections that follow present benchmarks, payer policy patterns, and coding nuances when available, along with links to clinical background and resources for further review.
Billing Code Overview
CPT code 0108T measures cold sensation and pain thresholds by stimulating the skin of an extremity and comparing responses to normal values. The service quantifies cooling sensory function to assess damage to small nerve endings and helps characterize sensory neuropathy.
Service Type: Sensory nerve function testing / Quantitative sensory testing
Typical Site of Service: Outpatient clinic or specialized neurodiagnostic laboratory
Clinical & Coding Specifications
Clinical Context
A 54-year-old patient with a history of chemotherapy-induced peripheral neuropathy presents with persistent numbness and burning pain in the distal lower extremities. The referring neurologist orders quantitative sensory testing to evaluate small-fiber sensory function. In the outpatient neurodiagnostic laboratory, a trained clinician explains the 0108T test purpose and obtains informed consent. The patient is positioned comfortably with the lower extremity exposed. The clinician applies calibrated cold stimuli to standardized sites on the foot and lower leg while recording the temperature thresholds at which the patient first perceives cold and the temperature at which the sensation becomes painful. Results are compared to age- and sex-matched normative values and documented in the report. The findings help confirm small-fiber neuropathy, guide further diagnostic evaluation (for example, skin biopsy or autonomic testing), and inform management decisions such as medication selection and referral to pain management or physical therapy.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when the test required substantially greater effort or time than typical and documentation supports unusual circumstances. |
26 | Professional component | Use when billing only the interpreting clinician's professional component separate from technical services. |
52 | Reduced services | Use when the test is partially reduced or not completed as planned with appropriate documentation. |
53 | Discontinued procedure | Use when the procedure was started but terminated due to patient condition or other extenuating circumstance. |
62 | Two surgeons | Use if two surgeons with different specialties are required and both meet reporting criteria for the professional component. |
78 | Return to operating room | Rare for this diagnostic test; use only if an immediate return to the OR for related surgical reasons occurs post-procedure. |
80 | Assistive personnel | Use when a surgical assistant is required for related procedures; infrequently applicable to standalone sensory threshold testing. |
AD | Medical supervision by a physician other than the billing physician | Use when another physician provides required supervision as allowed by payer policy. |
TC | Technical component | Use when billing only the equipment and technical services portion of the test separate from professional interpretation. |
QK | Medical direction of two or more certified assistants | Use when medical direction of qualified assistants is required and documented. |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207RC0000X | Neurology | Neurologists commonly order and interpret quantitative sensory testing for neuropathic disorders. |
2084N0400X | Physical Medicine & Rehabilitation | PM&R physicians evaluate functional sensory deficits and may use results to guide rehabilitation. |
207L00000X | Pain Medicine | Pain specialists use sensory threshold data to characterize neuropathic pain and plan interventions. |
207K00000X | Clinical Neurophysiology | Clinicians with neurophysiology expertise perform and interpret neurodiagnostic sensory testing. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
G62.0 | Drug-induced polyneuropathy | Chemotherapy or other medications can damage small nerve fibers; cold threshold testing quantifies sensory loss. |
G63 | Polyneuropathy in other diseases classified elsewhere | Systemic diseases (for example, diabetes) cause peripheral neuropathies where small-fiber testing is informative. |
G60.9 | Hereditary and idiopathic neuropathy, unspecified | Used when a neuropathic process is suspected and small-fiber assessment helps characterize sensory deficits. |
G90.9 | Disorder of the autonomic nervous system, unspecified | Autonomic small-fiber involvement may coexist; sensory threshold testing contributes to the diagnostic picture. |
M79.2 | Neuralgia and neuritis, unspecified | When focal neuropathic pain is present, cold perception thresholds can document small-fiber dysfunction. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
95900 | Motor nerve conduction, amplitude and latency/velocity study; per limb | Performed when large-fiber neuropathy is suspected alongside small-fiber testing to provide a comprehensive electrodiagnostic evaluation. |
95907 | Sensory nerve conduction, amplitude and latency/velocity study; per limb | Complements cold perception threshold testing by objectively assessing large-fiber sensory conduction. |
95913 | Needle electromyography (EMG); two to three muscle(s) | Used to evaluate for concurrent motor neuropathy or radiculopathy when clinical exam suggests mixed-fiber involvement. |
0306T | Quantitative sudomotor axon reflex test (QSART) | Assesses autonomic small-fiber function and is often ordered with cold threshold testing to evaluate small-fiber neuropathy comprehensively. |
0488T | Quantitative sensory testing, temperature and vibration thresholds | Related specialized sensory testing; may be billed when a more extensive battery of quantitative sensory tests is performed. |