Pain management billing services for injections and RFA

The codes a pain practice bills most

Modifiers that matter

Payer rules to know

Top denials in pain management billing services for injections and rfa

What does pain management billing cover?

Pain management billing covers claims for interventional spine procedures (epidural steroid injections, facet joint injections and medial branch blocks, radiofrequency ablation), the visits around them and urine drug testing. Most Medicare rules for these services are written by each regional Medicare Administrative Contractor (MAC) in a local coverage determination (LCD), a policy that says when a service is medically necessary in that region.

The same procedure can be billed from three settings, and the setting changes who reports what. Our anesthesia billing page covers the sedation side.

The ASC rule is in Novitas billing article A56670 and Noridian billing article A58993: physicians keep modifier 50, and only the ASC facility reports RT and LT lines.

Which codes does a pain practice bill most, and does Medicare pay them?

A pain practice bills four code families: epidural injections (62320 through 62327 and 64479 through 64484), facet joint injections (64490 through 64495), facet nerve destruction by radiofrequency (64633 through 64636) and office visits. The CMS Physician Fee Schedule file RVU26D, updated 08/26/2026, lists every injection and ablation code in the table above with payment status A, which means Medicare pays it under the fee schedule.

RVU26D gives the injection codes a 000 or ZZZ global period and gives 64633 and 64635 a 010 global period. CPT descriptors belong to the AMA, so the table paraphrases them.

How do we bill an epidural steroid injection with imaging guidance?

You bill the epidural code that says "with imaging guidance" and nothing for the imaging. The 2026 NCCI Policy Manual, Chapter VIII, says codes 62321, 62323, 62325 and 62327 describe injections done with fluoroscopic or CT guidance, and that imaging codes such as 77003 (fluoroscopic guidance for spine injection) or 77012 (CT needle guidance) are included and not reported separately.

Cervical or thoracic interlaminar injections go on 62321 and lumbar or sacral ones on 62323. Transforaminal injections use 64479 for the first cervical or thoracic level and 64483 for the first lumbar or sacral level, with 64480 and 64484 for each added level. Article A58993 says a T12-L1 transforaminal injection uses 64479.

L39240 is the Noridian policy, revised for services on or after 04/16/2026. Other MACs publish their own ESI policies, so confirm the numbers for your jurisdiction. A diagnostic selective nerve root block is coded like an epidural, so A58993 says to add KX to that line.

How do we bill facet joint injections and medial branch blocks?

You bill one primary code for the first level and one add-on code for the second level, and you count facet joints, not nerves. Article A56670 says 64490 (cervical or thoracic) or 64493 (lumbar or sacral) reports a single level done with fluoroscopy or CT, and 64491 or 64494 reports a second level on top of it. If several nerves of one joint are injected, that is still one level.

The Novitas LCD L34892 and article A56670 set the frequency limits below for Medicare in Novitas states, including Texas, Oklahoma, New Jersey and Pennsylvania. A posted revision for services on or after 12/06/2026 changes the repeat radiofrequency test from pain relief and function to pain relief or function, and keeps the limits below.

A session is every facet procedure done on the same day, so a medial branch block and an ablation on one date count as one session. Article A56670 says modifier KX goes on every diagnostic injection line, and that aberrant KX use can trigger focused review.

How do we bill bilateral facet procedures and radiofrequency ablation?

Medicare wants one line, one unit and modifier 50 for a bilateral facet procedure. Chapter I of the 2026 NCCI Policy Manual says bilateral surgical procedures are reported with modifier 50 and one unit of service unless the code descriptor already says bilateral. Claims Processing Manual Chapter 12, section 40.7.B, says the same, noting it differs from the CPT guideline of two lines.

Article A56670 applies it to the spine. A bilateral injection at one level is 1 unit of the primary code with modifier 50, and a unilateral one must carry RT or LT or the line is rejected. A bilateral injection at T12-L1 and L1-L2 is 64490-50 plus 64494-50. Nerve destruction is counted per joint, not per nerve, so 64635 and its add-on 64636 each take one unit, with modifier 50 on every bilateral line.

In RVU26D the bilateral indicator for 64490, 64493, 64633 and 64635 is 1, which pays the lower of the billed amount or 150% of the single-side fee schedule amount. For 62323 it is 9, meaning the concept does not apply.

Commercial plans may want RT and LT on two lines, so check the payer manual before assuming the Medicare format.

Can we bill a visit on the day of an injection?

Yes, but only for work beyond the decision to do the procedure. The 2026 NCCI Policy Manual, Chapter I, says a procedure with a 000 or 010 day global period is a minor surgical procedure, and the decision to perform it is included in its payment. A significant, separately identifiable E/M service is reported with modifier 25, and the two need not have different diagnoses.

For 64633 and 64635, which have a 010 global, a routine check of the result inside the 10 days is part of the package. A visit for a new problem can be billed with its own documentation.

Do pain procedures need prior authorization?

Medicare requires it for facet joint procedures billed from a hospital outpatient department, and in six states for epidural injections too. CMS says hospital OPDs must submit a request and receive a provisional affirmation before the claim is paid, and claims without one are denied. The CMS OPD prior authorization page still lists facet joint interventions for services on or after July 1, 2023.

• Facet codes in the OPD program: 64490, 64491, 64493, 64494, 64633, 64634, 64635 and 64636. CMS removed 64492 and 64495 on 08/16/2024 because three or more levels are non-covered under the revised LCDs.
• Where it applies: only hospital OPD claims. CMS says physician offices and ASCs are not required to submit requests. Physicians may file for the hospital, but the hospital owns the condition of payment.
• Timing: a standard decision takes up to 7 calendar days, an expedited one 2 business days, and a provisional affirmation is valid for 120 days.

The Wasteful and Inappropriate Service Reduction (WISeR) model is separate. For services on or after January 15, 2026 through December 31, 2031, Original Medicare providers in Arizona, New Jersey, Ohio, Oklahoma, Texas and Washington can request prior authorization or go through pre-payment review for epidural steroid injections (62321, 62323, 64479, 64480, 64483 and 64484). CPT 62323 is in scope only when used for an ESI. Medicare Advantage is not affected.

A WISeR decision is expected within 3 calendar days. Skip it and the claim goes to pre-payment review, with 45 calendar days to answer the documentation request. Commercial lists change often, so we check each payer before scheduling. See our prior authorization service.

How do Medicare and commercial plan rules differ for pain claims?

Medicare follows the MAC's LCD, and commercial plans follow their own medical policy, which can be stricter. A good example is UnitedHealthcare Commercial. Its Epidural Steroid Injections for Spinal Pain policy (2026T0616O, effective September 10, 2026) allows 4 sessions per region per year, counted from the first approved injection, and treats ultrasound guidance as unproven.

Its Facet Joint and Medial Branch Block Injections for Spinal Pain policy (2026T0004WW, effective September 10, 2026) is narrower than the Medicare LCDs. It covers a diagnostic block only when radiofrequency ablation is being considered and treats therapeutic facet injections for chronic pain as unproven. See our UnitedHealthcare billing guide and Medicare billing guide.

How do we bill urine drug testing in a pain practice?

Bill one presumptive code and one definitive code per date of service. Under the 2026 NCCI Policy Manual, Chapter X, presumptive testing uses 80305, 80306 or 80307 and only one may be reported per date of service, and definitive testing uses G0480 through G0483 or G0659, also one per date of service.

Validity checks on the urine specimen, such as pH, specific gravity or creatinine, are not billed separately. RVU26D lists these codes with status X, a statutory exclusion from physician fee schedule payment. Frequency rules differ by MAC and payer, so check the policy first.

What are the most common pain management denials, and how are they worked?

The most common pain denials are medical necessity (CARC 50), frequency (151), diagnosis mismatch (11), bundling (97), missing authorization (197) and modifier errors (4). A CARC is a claim adjustment reason code, the numeric reason a payer gives on the remittance.

The table above gives the fix for each. RAC topic 0119, approved in 2018 for all A/B MACs, covers medical necessity and documentation for epidural injections, so expect records requests. See our denial management service for how we work them.

What documentation does a pain practice need to support the codes billed?

The chart needs the facts the LCD tests, in the note for that date. Both LCDs require an objective pain scale at baseline and the same scale at each follow-up.

• The qualifying diagnosis, such as radiculopathy for an epidural or facet-mediated pain for a block.
• At least 4 weeks of failed conservative care, or an acute herpes zoster exception for epidurals.
• The pain and disability scores before, after each diagnostic block and at follow-up, with the scale named.
• Percent and duration of relief after each prior procedure.
• The imaging used (fluoroscopy or CT), the level, the side and the number of levels.
• The reason for any sedation, and for any repeat inside the limit.

How we handle pain management billing

We code each procedure from the procedure note, send claims within 24 hours of charge entry and work denials within 48 hours. Our certified coders (AAPC and AHIMA) check imaging bundling, laterality, add-on codes and frequency counts before the claim goes out. Our team has billed for US practices since 2018 and works to a 95% clean claim rate.

Our fee is a percentage of collections, shown on our pricing page. To talk through your practice, book a call. Compare neurology billing, orthopedic billing or browse all specialties.