CPT® Code 62323

Quick Reference

• Code definition: CPT 62323 covers a single injection of a diagnostic or therapeutic substance (anesthetic, steroid, opioid, antispasmodic, or other non-neurolytic solution) into the lumbar or sacral epidural or subarachnoid space via an interlaminar approach, with real-time fluoroscopy or CT guidance [1].
• Key billing rule: Imaging guidance is fully bundled into 62323. Do not separately bill 77003 (fluoroscopic guidance) or 77012 (CT guidance); both are NCCI column-2 codes with modifier indicator 0, meaning no modifier can override the denial [3].
• Modifier essentials: Modifier 50 (bilateral) does not apply (bilateral indicator = 9). Modifier 59 applies when a distinctly separate cervical or thoracic procedure is billed on the same date. Modifier 22 applies for documented unusual complexity with a written narrative. Modifier 76 may apply for a clinically justified repeat injection the same day by the same physician.
• Documentation must-have: The procedure note must explicitly confirm real-time fluoroscopy or CT guidance was used intraoperatively. Without that documentation, only 62322 (without imaging) is supportable [8].
• Top confusion point: Interlaminar (62323) and transforaminal (64483) describe fundamentally different needle trajectories. The approach documented in the operative note determines the correct code; anatomy alone does not [6].
• Payer alert: No National Coverage Determination (NCD) exists for epidural steroid injections. Coverage is governed exclusively by MAC-level Local Coverage Determinations (LCDs), which vary by jurisdiction and impose frequency limits, typically 3 injections per 6-month period per region [5].
• MUE: 1 unit per date of service (MAI 3, clinical). The descriptor uses "Injection(s)," allowing multiple boluses at the same encounter, but only 1 unit may be billed per day regardless [4].

When to Use This Code

CPT 62323 applies when all three conditions are present: (1) the injection targets the lumbar or sacral (including caudal) epidural or subarachnoid space, (2) the needle or catheter is placed via an interlaminar approach, posterior midline or paramedian between adjacent laminae, and (3) real-time fluoroscopy or CT guidance was actually performed and documented [1].

Clinical indications include lumbar radiculopathy, sciatica from herniated nucleus pulposus with nerve root compression, lumbar spinal stenosis with neurogenic claudication, spondylosis with radicular symptoms, degenerative disc disease causing radiculopathy, and postlaminectomy syndrome or failed back surgery syndrome. Axial back pain alone, without a structural radiculopathy or stenosis diagnosis, does not meet MAC LCD medical necessity criteria for this procedure [5].

Caudal epidural injections are captured by 62323 when performed with imaging guidance. The CPT descriptor explicitly reads "lumbar or sacral (caudal)," meaning injections at the sacral hiatus fall here regardless of the specific entry point. No separate caudal epidural code exists [1].

Single injection scope: 62323 covers a needle or catheter placement used to deliver one or more boluses on a single calendar day, including catheter placement for a one-time dose that is then removed. If a catheter is left in place for continuous infusion or repeated boluses across multiple days, report 62327 instead [1].

Contrast injection for epidural localization is an integral component. CPT parenthetical guidance confirms that fluoroscopy or CT and any injection of contrast are inclusive components of 62323 and are not separately reportable [1].

Code Differentiation Table

The most critical differentiator is interlaminar versus transforaminal. An interlaminar injection enters the posterior epidural space between adjacent laminae via a posterior midline or paramedian straight trajectory. A transforaminal injection targets a specific nerve root foramen via a paramedian oblique "Scotty dog" approach. The operative note must clearly describe the trajectory. Auditors flag mismatches between documented approach and billed code as a primary post-payment finding [6].

Spinal region of needle entry, not where the drug spreads, determines code selection. If the needle enters at L3/L4 and injectate spreads to the thoracic region, report 62323 once, not a combination with 62321 [1].

flowchart TD
    A[Spinal injection planned] --> B{Spinal region?}
    B -->|Cervical or thoracic| C{Imaging guidance?}
    B -->|Lumbar or sacral| D{Approach?}
    C -->|Yes| E[62321]
    C -->|No| F[62320]
    D -->|Interlaminar| G{Imaging guidance?}
    D -->|Transforaminal| H[64483]
    G -->|Yes| I{Catheter indwelling?}
    G -->|No| J{Catheter indwelling?}
    I -->|Single day bolus| K[62323]
    I -->|Multi-day infusion| L[62327]
    J -->|Single day bolus| M[62322]
    J -->|Multi-day infusion| N[62326]

Billing & Modifier Rules

Modifier 50 (Bilateral): Not applicable. The PFS bilateral surgery indicator for 62323 is 9 (concept does not apply). The interlaminar approach targets the central epidural space; laterality is not an attribute of this technique. Appending modifier 50 will result in an overpayment, a claim flag, or a recoupment demand [2].

Modifiers LT/RT: Not applicable to 62323 for the same anatomical reason. These modifiers are appropriate for transforaminal codes (64483, 64484) where a specific nerve root and laterality are targeted.

Modifier 59 (Distinct Procedural Service): Appropriate when 62323 is billed alongside a cervical or thoracic epidural (e.g., 62321) on the same date at a distinctly separate region, supported by two separate procedure notes [7].

Modifier 22 (Increased Procedural Services): Applicable when documented unusual complexity exists, such as severe multilevel spinal stenosis requiring repeated needle repositioning or prior surgical scarring that significantly complicates epidural access. Requires supporting documentation and a written narrative explanation on the claim [7].

Modifier 76 (Repeat Procedure, Same Physician): May apply if the same physician performs a second injection on the same date with clinical justification. This is uncommon but can arise following a technically unsuccessful first attempt that was then completed as a separate encounter.

Modifier 53 (Discontinued Procedure): If the procedure is initiated but aborted due to patient condition (e.g., severe vasovagal response, respiratory compromise), modifier 53 allows partial billing with documentation of the circumstances.

Add-on code 0777T: Real-time pressure-sensing epidural guidance system may be reported in addition to 62323 when that technology is used. Confirm payer coverage before billing; many payers do not currently reimburse this add-on [1].

Bundling alerts:

CPT 72275 (epidurography, RS&I) was deleted effective December 31, 2021 [1]. Any claim submitted with 72275 after that date is automatically denied. The epidurographic component is now bundled into 62323 and the other "with imaging" codes in the 62320 to 62327 family.

MUE = 1 (MAI 3, clinical). Multiple boluses at the same interlaminar level in one session still report as 1 unit per the "Injection(s)" descriptor language. Units of 2 or more are auto-denied on post-payment review [4].

Global period: 000 (minor procedure). Routine follow-up within 10 days of service is included in the 62323 payment. Complications requiring a separate evaluation or return procedure are separately reportable [2].

Documentation Essentials

Required elements:

• Approach and level: State "interlaminar" explicitly. Identify the interspace (e.g., L4/L5, L5/S1) or "sacral hiatus" for caudal access. Use of "paramedian" or "midline posterior" trajectory language supports interlaminar classification and distinguishes from a transforaminal approach.
• Imaging modality: Specify fluoroscopy or CT. State that real-time imaging guided needle placement during the procedure. A post-procedure notation alone is insufficient; the body of the note must reflect guidance during needle advancement.
• Contrast injection and spread: Document contrast agent, volume, and the resulting spread pattern, confirming epidural distribution and absence of vascular uptake on anteroposterior and lateral views. This element supports both accurate code selection and demonstrates compliance with imaging guidance requirement.
• Injectate: Drug name, concentration, and volume (e.g., methylprednisolone acetate 80 mg/2 mL with 3 mL preservative-free normal saline). The descriptor requires non-neurolytic substances; document accordingly [1].
• Single injection confirmation: If a catheter was used for a same-day bolus and removed, document this explicitly to support 62323 rather than 62327.
• Medical necessity: Primary ICD-10-CM diagnosis correlating to the clinical presentation; symptom duration; functional impairment level; prior conservative care with specific modalities, dates, and duration; reference to supporting imaging (MRI or CT report) confirming structural pathology [5] [8].

Audit red flags specific to 62323:

• Operative note documents a paramedian oblique or transforaminal approach while the claim shows 62323. This is the most-cited approach mismatch in post-payment reviews of epidural injection claims [6].
• Fluoroscopy use documented only in the facility charge record without a corresponding physician note confirming real-time guidance. MACs treat absent physician documentation as absent guidance, supporting only 62322.
• Claims for axial low back pain (M54.50, M54.51, M54.59) without accompanying radiculopathy or stenosis diagnoses are denied under MAC LCDs as non-covered indications [5].
• Missing conservative care documentation. Most MAC LCDs require 4 to 6 weeks of documented failed conservative treatment (physical therapy with dates, NSAID trial) before epidural steroid injections qualify as medically necessary [5] [8].
• Billing 62323 more than 3 times in a 6-month period per region without documented 50% or greater functional improvement from the prior series triggers LCD-based frequency denials [5].

Medicare, Commercial & Medicaid Payer Rules

Medicare:

No NCD governs epidural steroid injections; coverage is entirely LCD-driven and varies by MAC jurisdiction [5]. All 12 MAC jurisdictions maintain active LCDs. Search the CMS Medicare Coverage Database filtered by "epidural injection" to locate the active LCD and article number for the specific jurisdiction. LCD compliance is a prerequisite for payment; non-covered diagnoses result in denial regardless of procedural accuracy.

Site-of-service payment differential: The 2026 PFS assigns 62323 a non-facility total RVU of 8.18 versus a facility total RVU of 2.67 [2]. The non-facility premium compensates the physician practice for owning and operating fluoroscopy equipment. The place of service code on the claim must match the actual setting. Billing the non-facility rate for a procedure performed in a hospital outpatient department or ASC is an OIG audit target for improper payment [6].

Frequency limits: Up to 3 injections per 6-month period per spinal region; up to 6 per year under typical MAC LCD. Continuation past an initial series requires documented 50% or greater pain reduction or functional improvement. Claims exceeding the frequency threshold without clinical justification are subject to post-payment recoupment [5].

Medicare Advantage (Part C): Prior authorization requirements vary by plan. MA plans are not required to follow traditional Medicare LCD criteria. Verify the specific plan's policies before scheduling; denials can occur even when traditional Medicare would cover the service.

Traditional Medicare Part B: No prior authorization required under current CMS policy. Subject to post-payment review by MACs and by the OIG, which has maintained spinal injection procedures as an ongoing improper payment review target [6].

Commercial payers:

Commercial payers broadly follow CPT guidelines for code selection but frequently impose prior authorization requirements for epidural injections regardless of setting. Some plans apply frequency limits more restrictive than MAC LCDs, and some require documented failure of specific conservative treatments before approving the procedure. Modifier 59 cannot override the bundling of 77003 or 77012 with 62323 at any payer, since imaging guidance is integral to the code.

Medicaid:

Medicaid coverage and prior authorization requirements are state-specific and managed Medicaid plan-specific. Many state programs require preauthorization and limit injections to 3 per year per region. Verify state-level fee schedules and managed care plan policies individually before submitting claims.

Common Denials & Prevention

Denial: Bundled service (77003 or 77012 submitted with 62323)

The NCCI PTP modifier indicator for both 77003 and 77012 paired with 62323 is 0, meaning no modifier can override the edit [3]. Prevention: Remove 77003 and 77012 from any claim line that includes 62323. Configure charge master (CDM) logic to suppress fluoroscopy guidance charges automatically when 62323 is selected.

Denial: Invalid or deleted code (72275 billed)

CPT 72275 was deleted effective December 31, 2021, and any claim submitted with it after that date receives automatic rejection [1]. Prevention: Remove 72275 from all CDMs and encounter templates. The epidurographic component is now integral to 62323; no replacement code is billed separately.

Denial: Downcoding to 62322 (imaging not documented)

If the procedure note does not confirm real-time fluoroscopy or CT guidance, the claim supports only 62322. MACs routinely downcode 62323 to 62322 on post-payment review when imaging documentation is absent or limited to facility-only records [8]. Prevention: Template the procedure note with a mandatory imaging guidance field that the treating physician must complete with specifics of the imaging modality used. Physician attestation must appear in the body of the note.

Denial: Non-covered diagnosis under MAC LCD

Axial back pain diagnoses (M54.50, M54.51, M54.59) without structural radiculopathy or stenosis do not satisfy MAC LCD coverage criteria [5]. Prevention: Ensure the primary diagnosis reflects the pathology supporting nerve-root-targeted therapy (e.g., M51.16 for lumbar disc with radiculopathy, M48.06 for lumbar spinal stenosis). Document the correlating imaging report in the chart before the procedure.

Denial: Frequency exceeded

A claim for a fourth injection within a 6-month period per region is denied under most MAC LCDs [5]. Prevention: Track injection frequency per region per patient. Before scheduling a procedure that exceeds the standard threshold, document 50% or greater clinical improvement from the prior series and consult the jurisdiction-specific LCD for guidance on frequency exceptions.

Denial: Approach mismatch (62323 billed; transforaminal approach documented)

Post-payment audits routinely flag claims where the operative note describes a transforaminal trajectory while 62323 (interlaminar) was billed [6]. Prevention: Code only from the operative note. Confirm that the documented approach language ("interlaminar," "midline," "paramedian posterior") aligns with 62323 rather than with 64483 ("transforaminal," "oblique," "foraminal spread," "Scotty dog").

Coding Scenarios

Scenario 1: A 58-year-old Medicare patient with 7 weeks of left leg radiculopathy and MRI-confirmed L4/L5 disc herniation with nerve root impingement presents to a pain management office. The physician note documents real-time fluoroscopic guidance, contrast confirming epidural spread without vascular uptake, and methylprednisolone acetate 80 mg with 4 mL preservative-free saline injected at L4/L5.

Correct coding: 62323 (POS 11, non-facility rate) + M51.16

Why: Interlaminar approach under fluoroscopy at a lumbar level with a single-day injection maps precisely to 62323. The diagnosis M51.16 (intervertebral disc disorders with radiculopathy, lumbar region) satisfies MAC LCD criteria. Do not add 77003; it is auto-denied [3].

Scenario 2: A pain management physician performs a caudal epidural steroid injection at the sacral hiatus under fluoroscopic guidance for a patient with bilateral lower extremity neurogenic claudication secondary to lumbar spinal stenosis.

Correct coding: 62323 + M48.07 (spinal stenosis, lumbosacral region)

Why: The CPT 62323 descriptor explicitly includes "lumbar or sacral (caudal)." The sacral hiatus entry point is not a separate code; 62323 with imaging guidance is correct when fluoroscopy is used [1].

Scenario 3: The procedure note reads: "Under fluoroscopic guidance, the needle was directed via a right paramedian oblique approach toward the right L5/S1 foramen. Contrast demonstrated right-sided foraminal spread along the L5 nerve root." The coder considers billing 62323.

Correct coding: 64483 + M51.17 (intervertebral disc with radiculopathy, lumbosacral region)

Why: "Paramedian oblique toward the foramen" and "foraminal spread" define a transforaminal approach. Billing 62323 when the note documents a transforaminal trajectory is a systemic coding error identified in post-payment audits [6].

Scenario 4: Following lumbar spine surgery, an anesthesiologist places an epidural catheter at L3/L4 under fluoroscopic guidance and connects it to an infusion pump for 72 hours of continuous post-operative pain management.

Correct coding: 62327 for the initial catheter placement; 01996 for each subsequent day of epidural drug management.

Why: 62323 covers single-day bolus injections. An indwelling catheter left in place for continuous infusion across multiple calendar days requires 62327. Billing 62323 in this scenario misrepresents the service [1].

Related Codes

• 62322: Interlaminar epidural/subarachnoid, lumbar or sacral, without imaging guidance; the no-imaging counterpart to 62323
• 62327: Interlaminar, lumbar or sacral, with imaging guidance, indwelling catheter; report when catheter is left for ongoing multi-day infusion
• 62321: Interlaminar epidural/subarachnoid, cervical or thoracic, with imaging guidance; same technique at a different spinal region
• 62320: Interlaminar, cervical or thoracic, without imaging guidance; region differs, no imaging
• 64483: Transforaminal epidural injection, lumbar or sacral, single level; different approach targeting a specific nerve root foramen
• 64484: Transforaminal epidural, lumbar or sacral, each additional level; add-on to 64483
• 77003: Fluoroscopic guidance for spine injection procedures; bundled into 62323, not separately reportable
• 0777T: Real-time pressure-sensing epidural guidance system; add-on to 62323 when technology is used, subject to payer coverage

Sources

1. AMA CPT Professional Edition 2026 — Official CPT descriptors, parenthetical instructions, and coding guidelines for the 62320 to 62327 family
2. CMS Physician Fee Schedule RVU26A — 2026 RVUs, global days, status codes, and payment indicators for 62323
3. CMS NCCI Procedure-to-Procedure (PTP) Edits, Practitioner v321r0 — Effective April 1, 2026; confirms 77003 and 77012 bundled into 62323
4. CMS NCCI Medically Unlikely Edits (MUEs), Practitioner Services Q1 2026 — MUE = 1 for 62323, MAI 3 (clinical)
5. CMS Medicare Coverage Database — MAC LCD policies for epidural injections; confirms absence of NCD
6. HHS OIG Work Plan — Spinal injection procedures as ongoing improper payment review target
7. CMS IOM Pub. 100-04, Claims Processing Manual, Chapter 12 — Modifier guidance and billing rules for physicians and NPPs
8. CMS IOM Pub. 100-08, Program Integrity Manual, Chapter 13 — LCD documentation standards and medical necessity criteria