Epidural Steroid Injections for Spinal Pain (for Ohio Only)
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This policy governs medical necessity, coverage criteria, and coding for epidural steroid injections (ESIs) for radicular spinal pain and applies only to Ohio; it informs providers and prior authorization reviewers about requirements for coverage under Colorado Rocky Mountain Health Plans.
When InterQual criteria cannot determine medical necessity, ESIs are proven and medically necessary when specified clinical criteria are met, including radicular back pain, ≥4 weeks of failed conservative treatment, objective evidence of nerve root involvement, and fluoroscopic/CT guidance.
A maximum of four ESI sessions per region per 12-month period is allowed, with definitions for session, region, and year, and conditions specified for subsequent injections.
Added requirement that ESIs be performed under fluoroscopic or computed tomography guidance.
Specified that ultrasound guidance for ESIs is unproven and not medically necessary.
Added documentation requirements: medical records must fully support medical necessity and may be requested for review.
Coverage and Medical Necessity Criteria
inv-01: Initial ESI medical necessity criteria
Covered when ALL of the following are met
When InterQual CP: Procedures, Epidural Steroid Injection is available, use InterQual for medical necessity determination first.
inv-02: Criteria for subsequent ESIs
Subsequent injections may be provided only when BOTH of the following conditions are met
Maximum of four sessions per region per year; a session = one date of service; a region = cervical, thoracic, or lumbosacral.
inv-03: Covered when ALL of the following are met — Summary of clinical indications and evidence-based stance
Summary of clinical indications and evidence-based stance
Evidence supports short- to intermediate-term benefit for radicular pain; insufficient evidence for nonradicular back pain.
Some thoracic trials required failure of conservative management >6 months for enrollment.
Multiple reviews and meta-analyses report short-term benefits but limited long-term efficacy.
Fluoroscopy or CT is required for covered ESIs; ultrasound is listed as unproven/not medically necessary.
inv-04: Coverage Rationale (when InterQual not determinative)
Covered when ALL of the following are met:
Applies when InterQual criteria do not determine medical necessity.
inv-05: Subsequent ESIs — Repeat injection conditions
Repeat injection conditions:
Validated measurement tools should be used to measure pain relief and functional improvement; do not exceed four sessions per region per 12-month period.
ESIs are contraindicated in certain clinical conditions and will not be approved when those contraindications are present. Conditions listed in the policy include: spinal neoplasm, rapidly progressing neurological deficit, and epidural abscess. Documentation in the medical record must demonstrate absence of these contraindications before an ESI is authorized.
Epidural steroid injections are intended for management of radicular back pain with objective evidence of nerve-root involvement. ESIs for spinal indications not specifically included in the criteria — including isolated axial or non-radicular back pain without evidence of nerve root involvement — are not covered because the evidence does not support effectiveness in those presentations.
For back pain without radicular symptoms, the policy does not support use of ESIs. Clinical summaries and guidelines note insufficient evidence that ESIs provide meaningful or sustained benefit for non‑radicular (axial) low back pain, and routine use in the absence of radiculopathy is generally not indicated.
The policy explicitly lists conditions that would contraindicate ESIs; these include but are not limited to spinal neoplasm, rapidly progressing neurological deficit, and epidural abscess. Providers should review the patient record for these diagnoses prior to requesting authorization.
Use of ultrasound guidance for ESIs is considered unproven and not medically necessary in this policy. The policy states that injections must be performed under fluoroscopic or computed tomography guidance for coverage, and ultrasound guidance is specifically listed as lacking sufficient evidence to be covered.
Evidence syntheses and guideline statements report that ESIs may provide short- to intermediate-term symptom relief for radicular pain but show little to no demonstrated long-term (>6 months) benefit for axial pain or routinely for spinal stenosis. The policy notes that routine use for axial pain or as a standard treatment for spinal stenosis is not recommended because sustained long-term benefit is uncertain.
Policy changes explicitly list several items as not covered or unproven: ultrasound-guided ESIs and ESIs for spinal indications not included in the coverage criteria (for example, non‑radicular axial back pain without nerve root involvement). These additions reinforce that fluoroscopic or CT guidance is required for covered ESIs and that non‑supported indications are excluded from coverage.
Procedure, Diagnosis, and Drug Codes
| 62320 | Injection(s), of diagnostic or therapeutic substance(s), interlaminar epidural or subarachnoid, cervical or thoracic; without imaging guidance. |
| 62321 | Injection(s), of diagnostic or therapeutic substance(s), interlaminar epidural or subarachnoid, cervical or thoracic; with imaging guidance (i.e., fluoroscopy or CT). |
| 62322 | Injection(s), of diagnostic or therapeutic substance(s), interlaminar epidural or subarachnoid, lumbar or sacral (caudal); without imaging guidance. |
| 62323 | Injection(s), of diagnostic or therapeutic substance(s), interlaminar epidural or subarachnoid, lumbar or sacral (caudal); with imaging guidance (i.e., fluoroscopy or CT). |
| 64479 | Injection(s), anesthetic agent(s) and/or steroid, transforaminal epidural, with imaging guidance (fluoroscopy or CT); cervical or thoracic, single level. |
| 64480 | Injection(s), anesthetic agent(s) and/or steroid, transforaminal epidural, with imaging guidance (fluoroscopy or CT); cervical or thoracic, each additional level. |
| 64483 | Injection(s), anesthetic agent(s) and/or steroid, transforaminal epidural, with imaging guidance (fluoroscopy or CT); lumbar or sacral, single level. |
| 64484 | Injection(s), anesthetic agent(s) and/or steroid, transforaminal epidural, with imaging guidance (fluoroscopy or CT); lumbar or sacral, each additional level. |
| M47.20 | Other spondylosis with radiculopathy, site unspecified |
| M47.22 | Other spondylosis with radiculopathy, cervical region |
| M51.15 | Intervertebral disc disorders with radiculopathy, thoracolumbar region |
| M54.10 | Radiculopathy, site unspecified |
| M54.12 | Radiculopathy, cervical region |
| M54.16 | Radiculopathy, lumbar region |
| M54.30 | Sciatica, unspecified side |
| S14.2XXA | Injury of nerve root of cervical spine, initial encounter |
| S34.21XA | Injury of nerve root of lumbar spine, initial encounter |
| methylprednisolone, hydrocortisone, triamcinolone, betamethasone, dexamethasone | injectable corticosteroids noted; FDA-approved drugs but not approved for epidural use |
Prior Authorization, Documentation, and Clinical Steps
Follow InterQual; provide full clinical documentation when InterQual is indeterminate
Use InterQual CP: Procedures, Epidural Steroid Injection for prior authorization and medical necessity determinations when available. If InterQual cannot determine medical necessity, submit documentation showing: (1) injection is for Radicular Back Pain based on history and physical exam; (2) radicular pain unresponsive to ≥4 weeks of conservative treatment (pharmacotherapy, activity modification, or physical therapy/home exercise); (3) evidence of structural/functional nerve root involvement by imaging or electrodiagnostic testing; and (4) the procedure will be performed under fluoroscopic or CT guidance.
Document prior conservative therapy and timing
Document trials of conservative therapy before requesting ESI. For acute/subacute radicular pain follow guideline guidance (typically a trial of an NSAID and a waiting period of at least 3 weeks); thoracic trials in RCTs required failure of conservative care >6 months for inclusion.
- At minimum, trial of nonsteroidal anti-inflammatory drug (or acetaminophen)
- Timing: at least 3 weeks for acute/subacute radicular pain per ACOEM; thoracic RCTs used >6 months
Prior authorization: submit documentation proving medical necessity when InterQual is not determinative
Prior authorization may be required. When InterQual does not resolve medical necessity, include records that demonstrate radicular pain, failed conservative therapy for ≥4 weeks, objective nerve‑root involvement, and that the injection will be performed with fluoroscopic or CT guidance.
Record ≥4 weeks of conservative treatment before ESI (unless InterQual applies)
Document specific prior conservative treatments for at least 4 weeks unless InterQual indicates otherwise. Include medication (NSAIDs/acetaminophen), activity modification, and physical therapy/home‑exercise details and duration.
- List medications tried and dates/doses (e.g., NSAIDs, acetaminophen)
- Describe activity modification advised and patient adherence
- Report physical therapy or home‑exercise program dates, frequency, and response
Use ESIs after stepwise conservative care—expect short/intermediate-term benefit
Evidence summaries support that ESIs provide short- to intermediate-term benefit versus conservative care for radicular lumbosacral pain but not sustained long-term benefit; document that ESI is considered after stepwise conservative care.
- Use ESI as part of stepwise care for radicular pain given short/intermediate-term benefit
- Do not rely on ESI for sustained long‑term (>6 months) benefit
Require ≥4 weeks of conservative therapies before ESI if InterQual is not determinative
When InterQual does not determine medical necessity, conservative therapies (NSAIDs/acetaminophen, activity modification, physical therapy/home exercise) must have been tried for at least 4 weeks prior to ESI.
- Minimum duration: ≥4 weeks of documented conservative therapies
- Examples: pharmacotherapy OR activity modification OR physical therapy/home exercise
Required medical-record documentation to support medical necessity
Include in the patient record relevant medical history, focused physical examination findings, and results of diagnostic tests (imaging or electrodiagnostics) that demonstrate nerve root involvement; documentation must fully support medical necessity and be legible and available upon request.
- History and physical exam documenting radicular symptoms and dermatomal distribution
- Imaging or electrodiagnostic reports showing structural/functional nerve‑root involvement
- Legible records kept in the medical chart and producible on request
Document prior conservative management and refractory details
Emphasize documentation of prior conservative management in the record: which therapies were tried, duration, patient response, and whether care was refractory—this detail is needed to justify ESI when InterQual does not determine coverage.
- Specify therapies (medication names/doses, PT regimen) and exact start/stop dates
- Document objective or patient‑reported response and why prior care was insufficient
Keep legible, complete medical records available for review
Maintain legible medical records that fully support medical necessity; reviewers may request records to verify clinical criteria, and failure to provide complete documentation can affect coverage decisions.
- Records must include history, exam, and pertinent diagnostic test results
- Make documentation available upon request during prior authorization or claims review
Denial risk for unproven services or requests exceeding limits
Requests for services that are unproven (for example, ultrasound‑guided ESIs) or that exceed policy limits (such as more than four sessions per region per 12 months) will be evaluated and may be denied.
- Ultrasound guidance for ESIs is considered unproven and not medically necessary
- Maximum: 4 ESI sessions per region per 12‑month period
Radicular symptoms and objective nerve‑root evidence are required
Do not request ESI for isolated axial back pain without radicular symptoms; ESIs are not supported by sufficient evidence for non‑radicular back pain and such requests risk noncoverage.
- Policy requires radicular symptoms and objective nerve‑root evidence for coverage
- ESI for non‑radicular axial low back pain is generally not indicated
Incomplete or missing documentation may lead to denial
Requests lacking required documentation (history/exam, evidence of nerve‑root involvement, prior conservative therapy details, or imaging guidance plan) may be denied if records do not fully support medical necessity or are not provided on review.
- Insufficient documentation of ≥4 weeks of conservative therapy risks denial
- Failure to provide imaging/electrodiagnostic evidence of nerve‑root involvement may lead to denial
Prior Conservative Care and Documentation Requirements
inv-41: Must be attempted and documented prior to ESI when InterQual does not determine medical necessity — ≥ 4 weeks
Must be attempted and documented prior to ESI when InterQual does not determine medical necessity:
Conservative therapy examples include pharmacotherapy (NSAIDs or acetaminophen), activity modification, or physical therapy/home exercise.
inv-42: Document prior conservative therapy and duration — variable (commonly ≥3 weeks; thoracic trial used >6 months)
Document prior conservative therapy and duration:
Typical durations vary: ACOEM suggests at least a 3-week trial for acute/subacute radicular pain; some thoracic trials required >6 months failure of conservative care.
inv-43: Must fail prior to ESI when InterQual is not determinative — ≥ 4 weeks
Must fail prior to ESI when InterQual is not determinative:
Documentation of failure and relevant supporting medical records may be requested for review.
Limits on Number and Timing of Injections
Guidance and Imaging for Procedure Performance
Fluoroscopy or CT guidance required for covered ESIs
All covered ESIs must be performed with fluoroscopic or computed tomography guidance; the policy explicitly requires fluoroscopy or CT for covered injections when InterQual is not determinative.
- Policy Coverage Rationale: 'The injection is performed under fluoroscopic or computed tomography guidance.'
- This imaging requirement applies to all covered ESIs under the policy.
Use fluoroscopy for ESI guidance; ultrasound is operator‑dependent and not generally accepted
Fluoroscopy is the commonly recommended image guidance for interlaminar, transforaminal, and caudal ESIs; ultrasound is discussed as operator‑dependent and may be acceptable in some settings, but the policy lists ultrasound guidance as unproven/not medically necessary.
- ASA recommends image guidance and transforaminal injections with image confirmation.
- Ahmed et al. meta-analysis found variable outcomes with ultrasound and noted operator dependence and study limitations.
Policy requires fluoroscopic or CT guidance; ultrasound considered unproven
Policy update explicitly requires that epidural steroid injections be performed under fluoroscopic or computed tomography guidance for coverage; ultrasound guidance is listed as unproven and not medically necessary.
- Policy History adds: 'The injection is performed under fluoroscopic or computed tomography guidance.'
- The policy also states ultrasound guidance for ESIs is unproven and not medically necessary.
Key Terms and Operational Definitions
Clinical Background and Evidence Summary
Spine pain is common and often self-limiting. Epidural steroid injections are a nonsurgical interventional option intended primarily to treat radiculopathy (radicular back pain) due to disc herniation or degenerative changes when conservative therapies have failed. ESIs may be delivered by interlaminar, transforaminal, or caudal approaches and are considered when short- to intermediate-term symptomatic relief is a clinical goal within a comprehensive treatment plan.
Services Considered Not Medically Necessary or Experimental
Not covered under this policy are: ultrasound-guided ESIs (listed as unproven and not medically necessary) and ESIs for non‑radicular back pain without objective evidence of nerve root involvement. The policy requires fluoroscopic or CT guidance for covered injections and excludes ultrasound-guided procedures and spine indications not expressly included in the coverage criteria.
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