Does Medicare Cover Spinal Injections? Rules, Costs, and Denials

Medicare does cover spinal injections, and most fall under Part B as outpatient procedures: after you meet the annual Part B deductible, Medicare pays 80% of the approved amount and you owe the remaining 20%. Coverage is conditional, though. Each type of injection has its own medical necessity rules, frequency caps, and documentation requirements, and a claim that skips any of them can be denied. If a spinal injection is given during an inpatient hospital stay, Part A applies instead.

Which Spinal Injections Medicare Covers

Medicare covers several distinct categories of spinal injection, each governed by its own Local Coverage Determination issued by the Medicare Administrative Contractors:

One important boundary: peripheral nerve blocks, which are sometimes grouped with spinal injections in patient conversations, are not spinal injections and are moving in the opposite direction on coverage. As of mid-2026, five Medicare Administrative Contractors have released proposed LCDs that would eliminate coverage for nearly all peripheral nerve blocks used for chronic pain, treating them as experimental. If finalized, only a small set of exceptions would remain covered, including trigeminal neuralgia radiofrequency neurolysis and steroid injections for carpal tunnel syndrome and Morton’s neuroma.{6American Academy of Pain Medicine. Medicare Releases Proposed LCD on Peripheral Nerve Blocks}

What Has To Be True Before Medicare Will Pay

Medicare doesn’t cover a spinal injection because your back hurts. It covers the injection because a specific diagnosis, backed by specific documentation, meets the criteria in the applicable LCD. The exact list varies by injection type, but the pattern is consistent.

For an epidural steroid injection, you need a documented diagnosis of radicular pain, radiculopathy, neurogenic claudication from disc herniation or spinal stenosis, post-laminectomy syndrome, or acute herpes zoster pain. The diagnosis must be supported by a physical exam and by concordant imaging such as an MRI or CT scan. You must have tried and failed at least four weeks of conservative treatment (physical therapy, medication, spinal manipulation), with acute herpes zoster pain the only exception to that waiting period. A baseline pain or functional score has to be recorded, and you must be participating in an active rehabilitation or home exercise program.{1CMS.gov. LCD L36920 – Epidural Steroid Injections for Pain Management}

Facet joint procedures are gated even more tightly. You need moderate to severe chronic axial neck or low back pain lasting at least three months that has not responded to conservative treatment and is not explained by another condition like disc herniation, fracture, or infection.{7CMS.gov. LCD L38841 – Facet Joint Interventions for Pain Management} Two confirmatory diagnostic medial branch blocks, performed at least two weeks apart and each producing at least 80% relief, are required before radiofrequency ablation.{2CMS.gov. LCD L33930 – Facet Joint Interventions for Pain Management} Ablation is the preferred long-term treatment; therapeutic facet joint injections are only covered if the provider documents why you are not a candidate for ablation.

Sacroiliac joint injection coverage requires pain between the upper iliac crests and the gluteal fold, lasting at least three months, below L5 without radiculopathy, and persisting despite at least four weeks of conservative therapy. Your provider also has to document at least three positive findings from six specified provocative physical exam maneuvers.{3CMS.gov. LCD L39462 – Sacroiliac Joint Injections and Procedures}

For a spinal cord stimulator, the requirements are the strictest. You need a multidisciplinary evaluation that includes psychological screening, and a temporary trial electrode has to demonstrate at least a 50% reduction in pain or a 50% reduction in pain medication along with functional improvement before a permanent device can be implanted.{8CMS.gov. LCD L37632 – Spinal Cord Stimulators for Chronic Pain}

How Many Injections Medicare Will Cover

Every category has frequency caps, and they are enforced. If you exceed the limit, the extra sessions won’t be paid.

A repeat epidural injection is only covered if the previous one produced at least 50% sustained improvement in pain or function for at least three months. If the first injection fails, a second attempt using a different approach or spinal level may be performed after 14 days. Treatment past 12 months is generally considered unnecessary unless functional disability is documented and improvement continues.{1CMS.gov. LCD L36920 – Epidural Steroid Injections for Pain Management}

What Medicare Will Not Cover

Some situations that patients often assume are covered aren’t. Epidural steroid injections are not covered for non-specific low back pain, axial spine pain without radiculopathy, complex regional pain syndrome, or cervicogenic headaches. Predetermined “blanket” series of injections are prohibited. Sedation or general anesthesia during the procedure is generally not covered, and injecting any substance not FDA-approved for epidural use causes the entire claim to be denied.{1CMS.gov. LCD L36920 – Epidural Steroid Injections for Pain Management}

For facet joint interventions, non-thermal denervation methods (chemical neurolysis, cryoablation, and laser neurolysis) are explicitly not covered.{7CMS.gov. LCD L38841 – Facet Joint Interventions for Pain Management} Radiofrequency ablation of the sacroiliac joint is not covered at all.{3CMS.gov. LCD L39462 – Sacroiliac Joint Injections and Procedures} For trigger point injections, imaging guidance and biologics like platelet-rich plasma are not reimbursed.{4CMS.gov. LCD L34211 – Trigger Point Injections}

What You’ll Actually Pay

Under Original Medicare, spinal injections covered by Part B are subject to the annual deductible of $283 in 2026. Once you meet it, Medicare pays 80% of the approved amount and you owe the remaining 20% coinsurance.{12Medicare.gov. Medicare Costs}

Where you have the procedure done matters. The same injection costs much more in a hospital outpatient department than in an ambulatory surgical center because of the facility fee. Two examples using 2026 national averages:

  • Lumbar interlaminar epidural (CPT 62323): approved amount of $476 at an ambulatory surgical center, with your share around $94; approved amount of $810 at a hospital outpatient department, with your share around $161.{}13Medicare.gov. Procedure Price Lookup – CPT 62323
  • Transforaminal epidural (CPT 64483): approved amount of $584 at an ambulatory surgical center, with your share around $116; approved amount of $1,002 at a hospital outpatient department, with your share around $199.{}14Medicare.gov. Procedure Price Lookup – CPT 64483

A Medigap supplemental policy can reduce or eliminate the 20% coinsurance. Medigap Plans A, B, C, D, F, and G cover 100% of Part B coinsurance. Plans K and L cover 50% and 75%, respectively. Plan N covers most Part B coinsurance with certain office and emergency room copayments. High-deductible versions of Plans F and G require you to pay up to $2,950 in Medicare-covered costs in 2026 before the supplemental policy pays anything.{15Medicare.gov. Compare Medigap Plan Benefits}

Prior Authorization Is Expanding

Medicare Advantage plans routinely require prior authorization for spinal injections. Under Medicare Advantage, standard prior authorization decisions must be made within seven calendar days and expedited decisions within 72 hours.{16Medicare Advocacy. Medicare Prior Authorization}

Traditional Medicare has historically not required prior authorization, but that is changing. Since July 2023, facet joint interventions and spinal cord stimulator implantation performed in hospital outpatient departments have required prior authorization.{16Medicare Advocacy. Medicare Prior Authorization} Beginning January 1, 2026, a CMS initiative called the WISeR (Wasteful and Inappropriate Services Reduction) model is applying technology-enabled prior authorization and pre-payment review to epidural steroid injections and several spinal surgery procedures in six states: New Jersey, Ohio, Oklahoma, Texas, Arizona, and Washington.{17North American Spine Society. Impact of Proposed Rule and Upcoming Spine-Related Changes} If prior authorization is required and not obtained, the claim can be denied in full and you or your provider will be left with the cost.

If Your Claim Is Denied

Medicare has a five-level appeals process, and the first level is the one most beneficiaries actually use.{18Medicare.gov. Medicare Claims Appeals}

  • Level 1, redetermination: file within 120 days of your Medicare Summary Notice; a decision usually comes within 60 days.
  • Level 2, reconsideration by an independent contractor: file within 180 days of the Level 1 decision.
  • Level 3, Administrative Law Judge hearing: file within 60 days of the Level 2 decision; a minimum dollar threshold applies.
  • Level 4, Medicare Appeals Council review: file within 60 days of the Level 3 decision.
  • Level 5, federal district court: file within 60 days of the Level 4 decision; the minimum claim amount for 2026 is $1,960.{}18Medicare.gov. Medicare Claims Appeals

Before you appeal, ask your provider for the documentation supporting medical necessity: the imaging report, records of failed conservative treatment, and the baseline and follow-up pain or functional assessments. Keep copies of everything you send to Medicare. Free help is available from your State Health Insurance Assistance Program at shiphelp.org or by calling 1-800-MEDICARE.{19CMS.gov. Medicare Parts A and B Appeals Process}