What sets pain management billing services apart
Pain management billing services have to account for rules that most office specialties never meet. Epidural steroid injections, facet joint procedures and radiofrequency ablation are paid only when coverage criteria, frequency limits, imaging guidance and level-by-level coding all line up. One missed detail, such as an extra lumbar level or an expired authorization, can deny a high-value procedure claim.
Practices also mix procedure days with clinic days. Pain management medical billing has to keep office visits, procedures, urine drug testing and, for physiatry groups, electrodiagnostic studies separate on the claim while showing why each one was needed. The sections below cover the checks we run for interventional pain and PM&R practices.
Eligibility and site-of-service checks before a procedure
The same injection bills differently in the office, an ambulatory surgery center and a hospital outpatient department, and patient cost sharing changes with it. We verify benefits for the planned site, confirm whether the plan applies the procedure to the deductible or a specialist copay, and estimate the patient's share before the date is booked.
Sedation needs its own check. The Medicare billing and coding article for facet joint interventions treats moderate or deep sedation and monitored anesthesia care as not medically necessary for standard facet injections, while allowing it for ablation when the need is documented. Commercial policies vary, so we confirm the plan's position before the procedure rather than after a denial.
Prior auth and LCDs for interventional procedures
Pain management prior authorization is routine with many commercial and Medicare Advantage plans, and Original Medicare now adds its own step in some states. Under the CMS WISeR model, which runs from January 2026 in six states including Texas, selected services, including epidural steroid injections reported with 62323, go through either prior authorization or a pre-payment medical review. CMS can change the service list, so we check the current model guide for each case.
What Medicare local coverage determinations expect
| Procedure | Typical Medicare LCD criteria (check your contractor's policy) |
|---|---|
| Epidural steroid injection | No more than four sessions per spinal region in a rolling 12 months; one region per session; transforaminal injections limited to two levels per session; fluoroscopy or CT guidance with images retained |
| Diagnostic medial branch blocks | Two diagnostic blocks, each giving at least 80 percent relief of the primary pain, before a first ablation; KX modifier on diagnostic facet injections |
| Facet radiofrequency ablation | No more than two sessions per spinal region in a rolling 12 months; a repeat ablation needs at least 50 percent improvement in pain and function lasting at least six months |
| Therapeutic intra-articular facet injection | Diagnostic response first; repeat injections need at least 50 percent relief lasting at least three months; no more than four sessions per region in a rolling 12 months |
| Facet levels per session | One or two levels, unilateral or bilateral; three or more levels are not covered |
Our authorization team requests approval by CPT code, level and side, records the approval window, and flags any case where the scheduled levels differ from what was approved. These Medicare facet policies do not cover ultrasound-guided facet procedures, which matters for clinics that use ultrasound in the office.
Interventional procedure billing and pain management CPT codes
Interventional pain management billing depends on reading each code descriptor closely. The epidural, facet and facet ablation codes include fluoroscopic or CT guidance, so the imaging is not billed separately. Add-on codes report each additional level, and facet codes count joints, not nerves: blocking two medial branch nerves that supply one joint is one level.
| Code | Descriptor (summary) | Billing note |
|---|---|---|
| 62321 | Interlaminar or caudal epidural injection, cervical or thoracic, with imaging guidance | Not a bilateral procedure; one unit per session |
| 62323 | Interlaminar or caudal epidural injection, lumbar or sacral, with imaging guidance | Not a bilateral procedure; one unit per session |
| 64479 / 64480 | Transforaminal epidural injection, cervical or thoracic, single level / each additional level | Modifier 50 when bilateral |
| 64483 / 64484 | Transforaminal epidural injection, lumbar or sacral, single level / each additional level | Modifier 50 when bilateral |
| 64490 / 64491 / 64492 | Facet joint or medial branch injection with imaging guidance, cervical or thoracic, first / second / third and additional levels | Add-on codes for added levels |
| 64493 / 64494 / 64495 | Facet joint or medial branch injection with imaging guidance, lumbar or sacral, first / second / third and additional levels | Add-on codes for added levels |
| 64633 / 64634 | Destruction of facet joint nerves by neurolytic agent with imaging guidance, cervical or thoracic, single joint / each additional joint | Repeat sessions limited by LCD |
| 64635 / 64636 | Destruction of facet joint nerves by neurolytic agent with imaging guidance, lumbar or sacral, single joint / each additional joint | Repeat sessions limited by LCD |
Epidural steroid injection billing
Epidural steroid injection billing starts with the approach. Interlaminar and caudal injections (62321, 62323) are reported once per session and are not bilateral procedures. Transforaminal injections (64479–64484) are reported per level, with modifier 50 for bilateral work on the professional claim, while ASC facility claims report each side on its own line with RT and LT. When a selective nerve root block is done for diagnosis, the Medicare epidural article calls for the KX modifier on the transforaminal code.
Facet injection billing and radiofrequency ablation billing
Facet injection billing uses one primary code, then an add-on for the second level and another for the third and beyond, although Medicare policy covers only two levels per session. Radiofrequency ablation billing should follow two qualifying diagnostic blocks, and the record should point to the dates and relief scores from those blocks. Sacroiliac joint work is coded separately, with 27096 for an image-guided SI joint injection and 64625 for radiofrequency ablation of the nerves to the SI joint.
PM&R billing and physiatry billing
Physical medicine and rehabilitation billing covers a wider mix than interventional pain. Physiatrists evaluate musculoskeletal and neurologic conditions, perform electrodiagnostic testing, give trigger point and joint injections, and often direct therapy plans. PM&R billing has to keep each of these separate on the claim and tie each to its own diagnosis and documentation.
| Code | Service (summary) | Billing note |
|---|---|---|
| 95907–95913 | Nerve conduction studies, coded by the number of studies performed | Each sensory, motor or H-reflex study on a distinct nerve counts as one study |
| 95885 / 95886 | Needle EMG of an extremity done with nerve conduction studies, limited / complete | Add-on codes; standalone EMG codes 95860–95864 are not used with NCS on the same day |
| 20552 / 20553 | Trigger point injection(s), one or two muscles / three or more muscles | Reported once per session, not per injection |
| 27096 | Sacroiliac joint injection with imaging guidance | Imaging is included |
| 64625 | Radiofrequency ablation of nerves to the sacroiliac joint, with imaging guidance | Check payer coverage before scheduling |
For physiatry billing, the needle EMG add-on codes require nerve conduction studies on the same date, and the number of studies drives the NCS code, so the report should list each nerve and test. Medicare expects a complete extremity EMG to include at least five muscles supplied by three nerves or four spinal levels. Practices that also run therapy can see how plan-of-care rules work on our rehab therapy billing page.
Pain management coding and documentation that holds up
Good pain management coding begins in the procedure note. The Medicare epidural article expects the indication, medical necessity and a baseline pain score in the record, and diagnostic blocks need a documented percentage of relief after the injection. Images showing final needle position and contrast flow, with at least two views, should be kept and available on request.
- Spinal region, levels and side listed and matching the codes billed
- Imaging modality named (fluoroscopy or CT) and images saved
- Pre- and post-procedure pain scores, plus functional change for repeat procedures
- Prior conservative care, such as therapy or medication, when the policy asks for it
- For urine drug testing, the clinical reason for each definitive test
Presumptive urine drug testing (80305–80307) and Medicare's definitive testing codes (G0480–G0483) face frequency limits and medical necessity review. The order should explain why definitive testing was needed, and appeals should include the treatment agreement and prior results.
Denials, underpayments and AR in pain practices
Common denials include sessions over the frequency limit, a missing KX modifier, more levels than the policy allows, a diagnosis outside the covered list, and imaging billed separately when the code already includes it. We sort denials by reason and payer, correct the coding where needed, and appeal with the procedure note, prior block results and the LCD criteria attached.
Procedure claims also pay with bilateral and multiple-procedure reductions, so a paid claim is not always a correctly paid claim. We compare each payment with the expected allowed amount and pursue short payments through underpayment recovery. Patient balances after the deductible can be set up on a payment plan.
Credentialing for pain and physiatry practices
Interventional physicians often work across an office, an ASC and a hospital outpatient department, so payer enrollment has to cover every location the claims will come from. A missing location on a payer file can deny an otherwise clean procedure claim.
Our provider credentialing and enrollment team tracks each application through a nine-stage process, from consultation and document collection through NPI and CAQH setup, payer applications, follow-ups and final approval, so new physicians and new sites are ready to bill.
How Fastora works with your practice
Fastora works in three phases. Our Virtual Assistant team handles scheduling, registration, insurance verification and copays collected upfront. Scriber support records visit and procedure documentation in your EHR in real time. Certified medical billing and coding professionals then handle claim submission, payment posting, denial management, AR follow-up and patient billing.
We work inside your existing EHR/PM system under the access you grant, with no software to install and no hidden setup fees, and we sign a BAA before accessing PHI. You get a dedicated account contact, transparent dashboards and a monthly review call. See our full medical billing services, read how pricing is set, or start with a free billing assessment.
Pain practices managing headache, seizure-adjacent and infusion therapies can compare neurology billing for study counts and drug authorization rules.
A pain management billing services company for interventional and PM&R practices
As a pain management billing services company, we handle the authorization-heavy reality of interventional pain: epidurals, facet procedures and stimulators all need prior authorization before the procedure, and the documentation has to support medical necessity on appeal. Injection and procedure coding is tracked by level and laterality, PT and rehab referrals stay coordinated with the therapy billing side, and denials are worked with the operative notes attached. Related: physical therapy billing, denial management, free medical billing audit.