Facet joint injections that are performed under fluoroscopic guidance may be considered medically necessary according to the *schedule outlined below when the following criteria are met:
The back or neck pain is chronic (i.e., persisting for more than 3 months); AND
Conservative therapy (e.g., physical and/or chiropractic therapy, oral analgesia and/or steroids and/or relaxants, activity modification) fails or is not feasible; AND
No evidence of contraindications, such as severe spinal stenosis resulting in intraspinal obstruction, infection, or predominantly psychogenic pain; AND
The pain is non-radicular (i.e., for patients with a complaint of radiation of pain into an upper or lower extremity), radiculopathy has been ruled out by an MRI, and no signs of dural tension exists (as evidenced by negative "straight leg raise" on physical exam); AND
Suspected spinal facet joint syndrome, as evidenced by low back pain that is exacerbated by extension and by prolonged standing/sitting and that is relieved by rest; AND
Absence of a prior fusion at the clinically suspect levels; AND
Absence of an unexplained neurological deficit; AND
Repeat interventions only upon return of pain and deterioration in functional status.
*Schedule: When the above criteria are met, the following schedule for diagnostic and therapeutic facet joint injection(s) that are performed under fluoroscopic guidance may be considered medically necessary:
1. DIAGNOSTIC PHASE (to determine origin of patient's pain)
A diagnostic block of the joint, or nerves innervating the joints, using a local anesthetic with or without corticosteroids is given initially.
In the diagnostic phase, a patient may receive one (1) injection per level per side in a seven (7) day period to determine the origin of the patient's pain.
If the diagnostic block provides pain relief, therapeutic facet injections are given no sooner than one week after a successful diagnostic block at that spinal region, (i.e., cervical, thoracic or lumbar).
2. THERAPEUTIC PHASE (after the diagnostic phase is completed)
In the therapeutic phase facet joint injection frequency is limited to every two (2) months, provided that each injection yields >50% relief for at least six (6) weeks.
Therapeutic facet joint injections should be repeated only as necessary according to the medical necessity criteria, and are limited to no more than six (6) times per year per spinal region for local anesthetic and steroid blocks.
If therapeutic facet injections are to be performed at a different spinal region:
A positive diagnostic block is required at that region; AND
The therapeutic frequency is limited to every two (2) months per spinal region; AND
Therapeutic improvement is required for additional facet injections; AND
All regions should be treated at the same time whenever possible, provided all procedures can be performed safely.
Facet injections are considered not medically necessary for the following:
When the above criteria are not met; OR
When there is a history of coagulopathy, systemic and/or local infection, or unstable medical conditions; OR
Additional therapeutic facet injections in the absence of an improvement in pain or function; OR
Therapeutic facet injections more frequently than every two (2) months per spinal region; OR
Therapeutic facet injections more frequently than six (6) times per year per spinal region; OR
In the presence of an unexplained neurological deficit.
Ultrasound (US) guidance of either facet or transforaminal injections is considered experimental, investigational and unproven.