CPT code 64495 – Lumbar/sacral facet joint injection, additional level

Key takeaways

CPT code 64495 is the add-on code for the third and any additional lumbar or sacral facet level, reported with 64493 and 64494.

It covers intra-articular injections and medial branch blocks, and fluoroscopy or CT guidance is included in the code.

Report 64495 once per date of service, however many levels beyond the second you treat.

Bilateral billing differs by payer, so check whether Medicare or the commercial plan wants modifier 50 or split lines.

Practice software such as Pabau checks each claim for missing details, like authorization codes, before it can be sent.

CPT code 64495: Descriptor, code type, and official details

CPT code 64495 is the add-on code for lumbar or sacral facet joint injections at the third and any additional level. It’s reported in the same session as 64493 and 64494, never on its own. The American Medical Association (AMA) writes its descriptor in two parts.

• Stem (64493-64495): Injection(s), diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (or nerves innervating that joint) with image guidance (fluoroscopy or CT), lumbar or sacral
• 64495 clause: Third and any additional level(s) (List separately in addition to code for primary procedure)

That closing parenthetical is the critical phrase. It confirms 64495 has no standalone billing authority, so a claim that carries it without 64493 is denied on arrival.

What procedure does CPT 64495 describe?

CPT 64495 describes a facet joint injection at the third or a further lumbar or sacral level, in the same session as 64493 and 64494. Under fluoroscopic or CT guidance, the needle goes into the zygapophyseal joint itself or next to the medial branch nerve that supplies it.

Both techniques fall under the same 64493-64495 range, because the AMA descriptor doesn’t split codes by technique. The note must still show which technique was used at each level, because payers audit for it.

Common indications include chronic axial low back pain, facet-mediated pain from degenerative joint disease, lumbar spondylosis, and spinal stenosis. A pain management practice treating these patients will often combine several levels in one session, which is the scenario 64495 exists to capture.

Fluoroscopy or CT guidance is included in 64493-64495, so don’t report 77003 or 77012 separately. The procedure note should still name the guidance modality used.

CPT code family 64493, 64494, and 64495 explained

The three codes work as a tiered set, a pattern common across CPT codes for multi-level procedures. One primary code covers level 1, 64494 covers level 2, and a single 64495 covers every level after that. Submitting only 64493 when three levels were injected leaves both add-on lines uncaptured.

For a four-level lumbar session, the claim reads 64493 (level 1) + 64494 (level 2) + 64495 x1 (levels 3 and 4). CMS billing and coding article A58364 limits 64495 to one unit per day, however many levels beyond the second are treated.

Modifier 51 is never appended to add-on codes, because they’re already exempt from multiple-procedure reduction. Document each level by spinal segment (for example L3-L4, L4-L5, L5-S1) so the note supports every line. The diagram below shows how that four-level session lines up.

How 64495 differs from the cervical/thoracic codes 64490-64492

The cervical and thoracic codes (64490 for level 1, 64491 for level 2, 64492 for level 3 and beyond) form a separate, parallel family. A common coding error is applying the lumbar add-on code to a cervical procedure, or mixing the two families on one claim. The anatomical region in the descriptor, not the level number, decides which code applies. Check the spinal region in the operative note before choosing a family.

Billing rules: Modifier 50, laterality, and add-on code stacking

Bilateral facet injections at the same level on the same date raise the modifier 50 question, and the answer depends on the payer. Under Medicare, the standard instruction for bilateral add-on codes is one unit of 64495 with modifier 50 appended, not two units. In an ambulatory surgery center (ASC), the surgeon still uses modifier 50, but the facility bills two lines with RT and LT.

Some commercial payers want two line items instead, one for each side. Those payers usually pay 100% of the allowed amount for the first line and 50% for the second, or 150% in total. Check the payer’s billing manual before you submit.

• Medicare bilateral add-on rule: One unit of 64495 with modifier 50, not two units.
• Commercial payer variation: Many want two line items, paid at 100% for the first and 50% for the second. Check the payer’s billing guide.
• Once-per-day limit: 64495 is reported once per date of service, whatever the number of levels beyond the second. LCDs also cap sessions per spinal region per year.
• Modifier LT/RT: When treating one side only, append the matching laterality modifier to each line.
• No modifier 51: Add-on codes are exempt from it, so never append it to 64494 or 64495.
• Never list 64495 before 64493: Claim systems expect the primary code first. Reversed line order can trigger an edit even when the rest of the data is correct.

Medicare coverage and reimbursement for CPT 64495

Medicare covers lumbar and sacral facet joint injections under one shared policy, Facet Joint Interventions for Pain Management. Every Medicare Administrative Contractor (MAC) adopted it in 2021, each under its own LCD number, such as L38773 for CGS.

The policy allows only one or two levels per session per spinal region, unilateral or bilateral. That makes a payable Medicare 64495 claim rare, because the code starts at the third level. The policy also caps each region at four diagnostic and four therapeutic sessions per rolling 12 months.

Confirm your MAC’s LCD number and version date before billing 64495, and cite them in any prior authorization request. Commercial payers set their own level limits, so check the plan’s policy for third-level injections.

For current reimbursement amounts, use the CMS Physician Fee Schedule lookup or the FastRVU 2026 RVU lookup to find facility and non-facility national rates. Rates change every year with the Medicare Physician Fee Schedule final rule and its conversion factor. Check you’re on the current year before building payer fee schedules.

After adjudication, payment arrives with an electronic remittance advice (ERA). Compare each ERA against your fee schedule to catch underpayments on the add-on lines of multi-level sessions.

ICD-10 diagnosis codes commonly paired with CPT 64495

The diagnosis code on a 64495 claim must support the medical necessity of treating several lumbar or sacral levels, so specificity matters. M54.5 (low back pain) was retired on October 1, 2021. It was replaced by M54.50 (unspecified), M54.51 (vertebrogenic) and M54.59 (other), and a claim still carrying M54.5 will be rejected.

Confirm the active code set against the current CMS ICD-10 code files before each claim cycle.

Where the note documents radiculopathy, the spondylosis code changes to M47.26 (lumbar) or M47.27 (lumbosacral). Stenosis without neurogenic claudication is M48.061.

Documentation requirements to support CPT code 64495

Procedure note documentation is the first defense against a 64495 denial on audit. Payers reviewing multi-level claims look for evidence that each level was treated, not just mentioned. Medical billing compliance for these procedures starts with a consistent procedure note template that captures every required element at the time of service. Retroactive addenda are routinely disallowed during appeals.

• Specific spinal levels treated: List each segment by name (for example L3-L4 left medial branch, L4-L5 right medial branch, L5-S1 bilateral intra-articular).
• Laterality at each level: Unilateral or bilateral, with the side named. This supports modifier selection and the line count.
• Technique: Intra-articular injection or medial branch block. 64495 covers both, but the note must state which was performed.
• Imaging guidance used: Fluoroscopy or CT. Guidance is bundled into the code, but most payer LCDs still expect it documented.
• Agents injected: Name and dose of anesthetic and/or steroid at each level.
• Patient response during or after the procedure: Pain score before and after, plus any immediate complications.
• Medical necessity statement: Failed conservative therapy, relevant imaging findings, and functional impact. This supports prior authorization criteria and audit defense.

Common claim denial reasons for CPT 64495 and how to resolve them

Most 64495 denials fall into a short list of preventable categories. Effective denial management in healthcare starts with catching them before the claim goes out. Claims management software can run those checks at the point of billing. Use the resolution steps below for claims that do get denied.

CPT 64495 vs CPT 64635/64636: Facet injection vs neurotomy

Facet joint injections (64493-64495) and radiofrequency medial branch neurotomy (64633-64636) serve different clinical purposes. The injection series usually comes first, to confirm the pain is facet-mediated. Lumbar neurotomy is billed as 64635, with 64636 as its add-on, once diagnostic blocks have given temporary relief.

Billing both families for the same level on the same date generally triggers an NCCI bundling edit. They’re payable together only when the record documents a distinct clinical reason for each.

How Pabau helps 64495 claims reach payers clean

Without connected software, a multi-level facet claim gets built by hand. Someone reads the procedure note, keys three CPT lines and checks the payer’s bilateral rule. Then they log into a separate clearinghouse portal to submit it.

Pabau builds the claim from the patient’s invoice, with the treatment and insurer details already attached. Before it can go out, background checks confirm the details insurers need, such as membership numbers and authorization codes. If one is missing, the Send button stays disabled until it’s fixed.

In the US, Pabau connects to Claim.MD, so you can run real-time eligibility checks, track claim status and post ERA remittances from one dashboard. A missing prior authorization or an underpaid add-on line shows up there long before it becomes a denial letter.

Reduce claim denials on facet injection codes

Pabau checks each claim for missing details before it’s sent, then submits it through Claim.MD with real-time eligibility checks. That means fewer 64495 claims come back denied.

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Conclusion

On a multi-level lumbar session, the add-on lines carry most of the billing risk. Get the line-up right first: 64493, then 64494, then one unit of 64495 for every level beyond the second.

From there, two habits prevent most repeat denials. A procedure note template that records level, side, technique and guidance at each segment answers audits on its own. A payer-by-payer bilateral reference stops modifier 50 errors before the claim is built.

Book a demo to see how Pabau catches missing claim details before your facet injection claims reach the payer.

Continue your research

Need to understand how clearinghouse submission works? Medical claims clearinghouse guide covers how electronic claim routing reduces errors and speeds reimbursement.

Want to track denial patterns across your CPT codes? Denial codes in medical billing explains CARC and RARC codes and how to action them efficiently.

Submitting 837P claims to Medicare for multi-level procedures? 837 file format guide walks through the EDI transaction structure that carries your facet injection claims to the payer.

Auditing your documentation habits? Medical billing compliance explains the record-keeping rules payers check during audits.

Reconciling multi-level payments? Electronic remittance advice shows how to read an ERA and spot underpaid lines.

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