Summary & Overview
CPT 0859T: Noncontact Near–Infrared Tissue Imaging and Interpretation
CPT code 0859T represents a noncontact near–infrared spectroscopic imaging service in which a provider exposes tissue to near–infrared light, acquires images, analyzes absorption and emission characteristics, interprets the findings, and issues a report. The code is specific to noncontact device configurations and applies to each additional anatomic site studied for reasons other than peripheral arterial disease screening. Nationally, this code is relevant as optical tissue characterization technologies expand in outpatient and ambulatory settings and as payers consider coverage and coding clarity for emerging diagnostic imaging.
Key payers covered include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical and service context for 0859T, the typical sites of service, common modifiers and billing considerations, and how this code fits within evolving diagnostic imaging practices. The publication summarizes benchmarks where available and highlights policy and reimbursement topics that affect adoption and billing consistency across major payers. Data not available in the input is noted where gaps exist.
Billing Code Overview
CPT code 0859T describes a noncontact near–infrared spectroscopic tissue assessment in which the provider exposes target tissue to near–infrared light, acquires images, analyzes the tissue’s absorption and emission of light, interprets results, and completes a report. This code is specific to studies performed without direct contact between the device’s spectrometer sensors and the skin and is intended for use when evaluating additional anatomic sites after the first for reasons other than peripheral arterial disease screening.
Service Type: Noncontact near–infrared spectroscopy imaging and interpretation
Typical Site of Service: Outpatient imaging clinics, ambulatory surgical centers, or other outpatient settings where noncontact optical imaging is performed
Clinical & Coding Specifications
Clinical Context
A 62-year-old patient with chronic lower extremity wounds and suspected impaired tissue perfusion presents to an outpatient vascular diagnostics lab. The provider uses a noncontact near-infrared spectroscopy device to image the target tissue (e.g., foot, calf) to assess tissue oxygenation and hemoglobin absorption/emission characteristics. The device is positioned near the skin without direct contact, calibrated, and sequential images are acquired of the first anatomic site. The provider interprets the images in real time, documents quantitative and qualitative findings, and completes a formal report. When additional anatomic sites (for example, contralateral foot or multiple wound margins) are studied for reasons other than peripheral arterial disease screening, the same workflow is repeated and 0859T is reported for each additional site. Typical site of service is an outpatient clinic, vascular lab, wound care center, or ambulatory surgical center where noncontact optical spectroscopy devices are available. Typical staff includes a trained technician to operate the imaging device and a clinician (vascular specialist, wound care physician, or dermatologist) to interpret and report the results.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When reporting only the physician interpretation and report separate from the technical acquisition (technical component billed separately). |
TC | Technical component | When reporting only the device operation/imaging acquisition separate from the professional interpretation. |
22 | Increased procedural services | When the service requires substantially greater work than typical and documentation supports increased work. |
52 | Reduced services | When the procedure is partially reduced or not completed as described in the CPT code description. |
53 | Discontinued procedure | When the procedure is terminated due to extenuating circumstances or patient safety. |
62 | Two surgeons | When two surgeons work together as primary surgeons on a single procedural service where applicable to interpretation/management. |
78 | Return to operating/procedure room for related procedure during postoperative period | When a related procedure is performed during the global period requiring return to the procedure room. |
QK | Medical direction of two, three, or four qualified individuals | When the reporting clinician medically directs multiple qualified individuals performing the service. |
QX | Ordered certified nurse-midwife, clinical nurse specialist, or physician assistant services furnished under physician supervision | When portions of the technical acquisition are performed by an auxiliary staff under the supervising practitioner. |
QY | Attending physician service by a physician immediately available | When an attending physician is immediately available for the service performed by auxiliary personnel. |
AS | Physician assistant, nurse practitioner, or clinical nurse specialist as primary surgeon | When such clinician performs the service in an ambulatory surgical center setting as the primary provider, if applicable. |
FX | Split/shared service — non‑physician practitioner | When the service is a split/shared E/M or other shared procedure between physician and non-physician practitioner, if local payer allows. |
FY | Split/shared service — physician and non-physician practitioner both bill for portions of service | When both providers bill for distinct portions, per payer policy. |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 207RH0000X | Vascular Surgery | Common interpreting specialists for vascular/tissue perfusion studies. |
| 2084P0800X | Dermatology | Interprets tissue oxygenation/imaging for wound-edge and skin lesions. |
| 261QP2300X | Wound Care | Specialists in wound assessment and serial imaging for healing evaluation. |
| 2080P0208X | Cardiology (Non-invasive vascular testing) | May perform or interpret peripheral perfusion imaging in vascular labs. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
L97.909 | Non-pressure chronic ulcer of unspecified part of unspecified lower leg, unspecified severity | Chronic lower-extremity ulcers often require tissue oxygenation assessment to guide wound management. |
I73.9 | Peripheral vascular disease, unspecified | Peripheral vascular disease can cause impaired tissue perfusion; spectroscopy imaging helps evaluate local oxygenation. |
E11.621 | Type 2 diabetes mellitus with foot ulcer | Diabetic foot ulcers are a common indication for tissue perfusion and oxygenation imaging to assess healing potential. |
R02 | Gangrene, not elsewhere classified | Tissue spectroscopy can assist in determining viability at wound margins in ischemic or gangrenous tissue. |
L89.309 | Pressure ulcer of sacral region, stage 3 | Complex wounds including pressure ulcers may be imaged to monitor tissue oxygenation around wound beds. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
93922 | External continuous recording of peripheral arterial pulse waveforms for 1 hour, or more; unilateral | Performed when vascular hemodynamic assessment is needed alongside tissue oxygenation imaging. |
93923 | Segmental pressure studies of the extremities (evaluation of arterial occlusive disease) | Commonly performed in the vascular lab when arterial occlusive disease is suspected in conjunction with tissue spectroscopy. |
97018 | Para‑metrical application of physical agent to wound(s) (e.g., ultrasound, shortwave diathermy) — not specific but used in wound care | Performed in wound care workflows; may be part of multimodal assessment and treatment planning following spectroscopy results. |
94010 | Blood gases analysis, not elsewhere classified (example diagnostic lab code) | Laboratory tests for systemic oxygenation that can complement localized tissue spectroscopy findings. |
99090 | Analysis of clinical data stored in an electronic health record for management of a patient (per 30 minutes) | Used when the spectroscopy data and imaging require separate clinical data analysis and reporting time beyond standard interpretation. |