CPT® Code 64483

Quick Reference:

• What 64483 means: Injection(s) of anesthetic agent and/or steroid, transforaminal epidural, performed with imaging guidance (fluoroscopy or CT); lumbar or sacral, single level. Imaging guidance is inherent to the code.
• Clinical purpose: Used for radicular pain attributable to lumbar/sacral nerve root pathology (for example nerve-root compression from disc herniation or stenosis). Coverage policies commonly require signs/symptoms consistent with radiculopathy and objective support (imaging and/or exam).
• Image guidance is not separately reportable (usually): Because fluoroscopy/CT guidance is included in 64483, separate billing of guidance codes is generally inappropriate unless a payer policy explicitly permits a rare exception. Medicare’s ESI billing/coding framework and related LCD guidance emphasize that imaging guidance is part of the covered ESI service.
• Session and level limits drive denials: Medicare and major commercial policies typically restrict the number of levels treated per session and the number of sessions per region per year, and they condition repeat injections on meaningful, durable improvement.
• Documentation must be audit-ready: Expect post-payment review focus on (1) radicular pain criteria, (2) failure of conservative therapy, (3) laterality and exact level(s), (4) imaging guidance/contrast documentation when required, and (5) objective response (pain/functional improvement).
• Add-on code: Use 64484 for each additional lumbar/sacral level (add-on). Do not report 64484 alone. Unit counting and level documentation are frequent audit triggers.

CPT 64483 is a high-scrutiny interventional pain procedure because payers can (and often do) audit it using objective criteria: documentation of radicular pain, imaging guidance technique, conservative-treatment failure, session/level limits, and whether repeat injections are supported by measurable improvement. In practice, most denials and recoupments arise from predictable problems: (1) missing objective radiculopathy support, (2) documentation that reads like axial back pain rather than radicular pain, (3) insufficient conservative care history, (4) treating more levels or more sessions than the policy allows, and (5) repeat injections without documented durable benefit. This 2026-focused guide explains how to code, document, and defend 64483 using Medicare LCD and billing/coding guidance plus major commercial policy frameworks.

1. Definition and Procedure Scope

CPT 64483 describes a lumbar or sacral transforaminal epidural injection (TFESI) performed at a single spinal level with imaging guidance (fluoroscopy or CT). The defining elements are not optional—if documentation does not support transforaminal approach and imaging guidance, the service no longer matches the code’s core requirements.

In operational terms, TFESI targets medication delivery in the region of the exiting nerve root via the neural foramen. The procedure is used to treat radicular pain patterns where the clinical hypothesis is nerve-root inflammation or irritation, often related to disc herniation, foraminal/lateral recess stenosis, or other compressive pathology. While clinical practice varies, payer coverage frameworks commonly distinguish TFESI for radicular pain from injections intended for axial pain alone.

What 64483 includes:

• Needle placement for transforaminal epidural access at one lumbar/sacral level
• Imaging guidance using fluoroscopy or CT (including documentation that guidance was used)
• Injection of local anesthetic and/or corticosteroid at that level

What 64483 does not include:

• Medication supply billing rules vary by site/payer; product billing (if allowed) is typically separate from the procedure code logic and must follow payer drug billing requirements.
• Additional levels require add-on coding (64484) and clear level-by-level documentation.

Practical boundary: “Transforaminal” is not interchangeable with interlaminar/caudal epidural techniques. If the record reads like an interlaminar epidural or a caudal approach, coding as 64483 becomes difficult to defend in an audit even if an epidural steroid injection occurred.

2. Clinical Indications and Appropriate Diagnoses

Coverage frameworks for TFESI generally converge on the same medical-necessity concept: radicular pain (with supporting history/exam and often imaging) that has not adequately improved with conservative therapy. Medicare’s epidural steroid injection LCD and associated billing/coding article are the practical anchors for coverage expectations because they specify the documentation and utilization logic used in claims review.

Common covered or policy-supported clinical presentations include:

• Lumbar radiculopathy / sciatica patterns: radiating leg pain in a dermatomal distribution, often with neurologic findings or provocative tests consistent with nerve-root involvement.
• Neurogenic claudication with radicular features: symptoms attributable to stenosis with nerve-root irritation patterns; policy specifics vary and require careful documentation of radicular pain rather than nonspecific back pain.
• Post-surgical radicular pain when documentation supports nerve-root pathology and conservative measures have been tried.

Many payers require objective support in at least one of the following forms:

• Imaging evidence (MRI/CT) showing disc herniation, foraminal stenosis, or other pathology plausibly matching the patient’s symptoms
• Neurologic exam findings (motor weakness, dermatomal sensory changes, reflex asymmetry) consistent with the affected root
• Electrodiagnostic testing in selected cases (policy-dependent)

UnitedHealthcare’s 01/01/2026 commercial policy explicitly frames ESI coverage around radicular pain supported by history and physical exam and requires policy-defined criteria to be met. Aetna’s TFESI policy similarly defines medical-necessity conditions and utilization limits.

Audit risk pattern: If the note primarily documents axial low back pain without radicular features, payers may conclude the injection does not meet policy indications for TFESI, even if imaging shows degenerative changes.

3. Technique, Imaging Guidance, and Contrast Expectations

A defensible 64483 record must show that the procedure was actually performed as defined: transforaminal epidural approach with fluoroscopy or CT guidance. The Medicare LCD and related billing/coding article are routinely used to evaluate whether the documented technique aligns with coverage expectations, including the role of imaging guidance and contrast use when required.

Core technique elements to document:

• Level and side (for example, “Right L4 TFESI”)
• Imaging modality (fluoroscopy or CT)
• Needle placement confirmation under imaging guidance
• Contrast use and findings (when used/required): confirmation of epidural spread and absence of vascular uptake, per local protocol/policy expectations
• Injectate (local anesthetic and/or steroid) with dose/volume

Medicare policies frequently emphasize that TFESI is expected to be performed with imaging guidance and appropriate technique documentation. The billing/coding article provides the coding framework and is commonly cited in denials when documentation does not support the required approach or utilization parameters.

Sedation: Many payer policies treat moderate/deep sedation or general anesthesia as unusual for routine TFESI and may require special justification. Medicare LCD guidance includes language that typically frames sedation as not routinely necessary for these procedures and may limit coverage absent specific circumstances. Commercial policies may also require that the patient be able to provide feedback during the procedure, depending on policy language and clinical context.

Documentation trap: A technically appropriate procedure can still deny if the report does not explicitly record imaging guidance and level/laterality. For payers, “not documented” often equals “not done.”

4. Documentation Standards and Medical Necessity

Documentation is the primary defense for 64483 because payers often perform records-based reviews after payment. Medicare’s LCD and billing/coding article define the documentation expectations that are commonly applied in audits and appeals.

4.1 Minimum medical-necessity packet

To make the claim and the chart tell the same story, include:

• Symptom description consistent with radicular pain: distribution, severity, duration, aggravating factors, and impact on function.
• Objective findings: neurologic exam abnormalities (if present) and/or imaging findings that plausibly match the affected level/side.
• Conservative treatment history: therapies attempted, duration, and response. Many policies require a defined minimum duration of conservative care unless urgent neurologic red flags exist.
• Procedure note completeness: level, side, imaging guidance, contrast findings when applicable, medication/dose/volume, complications, and patient response.
• Outcome tracking: pre- and post-procedure pain scores and/or functional measures, plus follow-up documentation showing duration and magnitude of improvement.

4.2 What payers look for when repeats are billed

Repeat injections are a high-yield review target. Policies commonly require that additional sessions be supported by meaningful benefit (often expressed as a percent improvement in pain and/or function and durability of benefit). Medicare LCD guidance and the billing/coding article are frequently used to support denials when repeat injections are billed without documented improvement meeting policy thresholds. UnitedHealthcare’s 01/01/2026 policy similarly conditions ongoing use on documented clinical response and policy-defined limits. Excellus BCBS policy frameworks also restrict utilization and specify documentation expectations around indications and frequency.

4.3 Injectate restrictions and investigational substances

Major payer frameworks generally restrict coverage to established injectates for epidural steroid injections and may deny claims involving nonstandard injectates under “investigational/not medically necessary” rationales. Medicare LCD guidance and commercial policies emphasize medically necessary, evidence-based use and typically exclude experimental substances.

Audit-proofing principle: The record must support (1) why TFESI is being used for this patient at this time, (2) why this level/side was selected, and (3) why a repeat session is medically reasonable based on measured benefit and policy limits.

5. Billing Rules: Professional vs Facility, Units, and Add-on Code 64484

Billing mechanics for 64483 are shaped by (a) who performs the professional work (the physician/QHP), (b) where the procedure is performed (office vs facility), and (c) how many levels are treated.

5.1 Professional vs facility reporting

• Professional claim: Typically reports 64483 for the physician/QHP service. Documentation must support the technical definition (transforaminal approach, imaging guidance, single level). Medicare and other payers may review professional claims against LCD/billing article criteria.
• Facility claim: Hospital outpatient departments and ASCs report the procedure per their billing rules and payer contracts; documentation alignment remains critical because denials often cite missing indication, missing imaging guidance documentation, or exceeding utilization limits.

5.2 Unit and level logic

The core unit concept is: one unit of 64483 equals one lumbar/sacral level treated transforaminally (with imaging guidance). Medicare’s LCD and associated billing/coding article are commonly used to enforce unit/level restrictions and to deny claims that appear to exceed policy-defined reasonable limits per session.

5.3 Add-on code 64484 (additional level)

Use 64484 for each additional lumbar/sacral level treated during the same session. It is an add-on code and must be reported with the primary service when additional levels are performed and documented. Medicare LCD/billing guidance is often used to evaluate whether additional levels were reasonable and whether the record supports correct level counting.

Common billing error: Reporting multiple units of 64483 for multiple levels rather than using 64483 + 64484 when additional levels are performed (when payer rules require the add-on structure). Even when the clinical care was appropriate, the coding structure can trigger denials.

6. Modifier Usage: Bilateral, Laterality, Distinct Services

Modifier expectations vary across payers and sites of service, but consistent principles apply: modifiers must reflect what was actually done, and the record must support laterality, levels, and distinctness.

6.1 Bilateral and laterality

Payer systems often require explicit laterality (RT/LT) and/or bilateral modifier usage for unilateral codes when both sides are treated. Documentation must clearly state whether the injection was unilateral or bilateral and identify side(s). Medicare LCD and commercial policies use level and side documentation to interpret whether the billed service is within session limits.

6.2 Distinct procedural service (59) and same-day procedures

Modifier 59 is sometimes used to identify a distinct service when multiple procedures are performed on the same date and bundling/edit logic would otherwise deny payment. However, for TFESI, many denials occur when modifier 59 is used without documentation supporting a truly separate and distinct service (separate anatomic site, separate session, or separate medically necessary procedure). Medicare guidance in the LCD/billing article framework is often applied to these scenarios.

6.3 Imaging guidance codes

Because 64483 includes imaging guidance by definition, payers commonly deny separate guidance billing unless policy and documentation clearly support a permitted exception. Medicare’s ESI billing/coding infrastructure and LCD guidance are routinely cited in these denials.

Modifier misuse risk: Modifiers that appear to “force payment” without clear documentation support (especially 59 in multi-procedure encounters) can elevate audit risk. A defensible record should stand on its own without relying on modifiers to fix missing documentation.

7. Common Denials and Audit-Defense Checklist

Across Medicare and commercial payers, the same patterns explain most 64483 denials and recoupments:

• No clear radicular pain indication: chart documents nonspecific low back pain without radicular features or without objective support (exam/imaging mismatch).
• Insufficient conservative care history: lack of documented duration/response to PT, medications, and other conservative management prior to injection (when required by policy).
• Missing technique details: absence of explicit imaging guidance documentation, contrast findings (when expected), or unclear level/side.
• Exceeded utilization limits: more sessions per region per year or more levels per session than policy allows; repeat sessions without documented durable benefit.
• Repeat injections without measurable response: insufficient pain/functional outcome tracking or lack of documented improvement to justify additional sessions.

Audit-defense checklist (use in every case)

• Radicular pain narrative (distribution, severity, functional impact)
• Objective support: imaging and/or neuro exam aligned with the treated level/side
• Conservative care documented (type, duration, response)
• Procedure note: level/side, imaging modality, contrast confirmation (as applicable), injectate and dose, complications
• Outcome tracking: baseline pain/function measure and follow-up documenting magnitude and duration of benefit
• Session accounting: prior injections this year by region; ensure policy frequency/level limits are not exceeded

8. Real-World Coding Scenarios

Scenario 1: Unilateral single-level lumbar TFESI for classic L5 radiculopathy

Setting: Office-based procedure suite. Clinical picture: Radiating leg pain in an L5 distribution with imaging showing foraminal narrowing at the corresponding level; conservative therapy documented. Service: Right-sided single-level TFESI at one lumbar level under fluoroscopy with contrast confirmation; steroid + anesthetic injected. Coding logic: Bill 64483 (unilateral) with payer-preferred laterality convention if required; do not separately bill imaging guidance because it is inherent to 64483.

Scenario 2: Two levels treated in one session (lumbar)

Setting: Hospital outpatient department. Clinical picture: Symptoms and imaging support involvement at two adjacent levels; conservative care and objective findings documented. Service: TFESI performed at two lumbar/sacral levels during the same encounter, both with imaging guidance. Coding logic: Report 64483 for the first level and 64484 for the additional level, with documentation explicitly listing each treated level and side. Ensure utilization limits and policy rules support treating two levels in one session.

Scenario 3: Repeat injection requested, but documentation does not support durable benefit

Setting: Office follow-up visit after prior TFESI. Clinical picture: Patient reports “it helped a little” but no baseline pain score, no functional measure, and no documented duration of relief. Risk: Repeat session may deny or be recouped because policies commonly require objective documentation of meaningful improvement to justify repeats. Best practice: Document standardized pain and function measures at baseline and follow-up; record percent improvement and duration; confirm the case remains within frequency/session limits before repeating.

Scenario 4: Payer denial for “no imaging guidance documented”

Setting: ASC procedure note with minimal templated text. Problem: Note does not explicitly state fluoroscopy/CT guidance, does not include contrast confirmation language, and does not identify level/side clearly. Outcome: Denial based on failure to document an inherent element of the code and/or policy-required technique elements. Fix: Standardize procedure templates to force entry of: level, side, imaging modality, contrast findings (when applicable), and injectate.