Trigger
point injection is one of many modalities utilized in the management of chronic
pain. Myofascial trigger points are self-sustaining hyperirritative foci that
may occur in any skeletal muscle in response to strain produced by acute or
chronic overload. Trigger point injections are indicated in symptomatic trigger
points.
Myofascial
trigger points are "small, circumscribed, hyperirritable foci in muscles
and fascia, often found with a firm or taut band of skeletal muscle. These
trigger points produce a referred pain patterned characteristic for that
individual muscle. Each pattern becomes a single part of a single muscle
syndrome. To successfully treat chronic myofascial pain syndrome
(trigger points) each single muscle syndrome needs to be identified along with
every perpetuating factor. These single
muscle syndromes is responsive to appropriate treatment, which includes
injection therapy.
The
pain of active trigger points can begin as an acute single muscle syndrome
resulting from stress overload or injury to the muscle, or can develop slowly
because of chronic or repetitive muscle strain. The pain normally refers distal
to the specific hypersensitive trigger point. Trigger point injections are used
to alleviate this pain. Injection is
achieved with needle insertion and the administration of agents, such as local
anesthetics, steroids and/or local inflammatory drugs.
ü
As initial (diagnostic)
or the only therapy when a joint movement is impaired, such as when a muscle
cannot be stretched fully or is in fixed position and/or when joint movement is
mechanically blocked as is the case of the coccygeus muscle.
ü
As treatment of trigger
points that are unresponsive to non-invasive methods of treatment, e.g.,
exercise, use of medications, stretch and spray.
There
is no laboratory or imaging test for establishing the diagnosis of trigger
points; it depends therefore upon the detailed history and thorough
examination. The following diagnostic criteria are needed:
Major criteria. All
four must be present to establish the diagnosis.
A. Regional pain complaint
B. Pain complaint or altered sensation in the expected
distribution of referred pain from a trigger point
C. Taut band palpable in an accessible muscle with
exquisite tenderness at one point along the length of it
D. D. Some degree of restricted range of motion, when
measurable.
Minor criteria. Only
one
of four needed for the diagnosis.
A. Reproduction of referred pain pattern by stimulating
the trigger point
B. Altered sensation by pressure on the tender spot
C. Local response elicited by snapping palpation at the
tender spot or by needle insertion into the tender spot
D. Pain alleviated by stretching or injecting the tender
Spot
After
making the diagnosis of myofascial pain syndrome and identifying the trigger
point responsible for it, the treatment options are:
1. Medical management, which may include consultation
with a specialist in pain medicine.
2. Medical management that may include the use of
analgesics and adjunctive medications, including anti-depressant medications,
shown to be effective in the management of chronic pain conditions.
3. Passive physical therapy modalities, including
"stretch and spray" heat and cold therapy, passive range of motion
and deep muscle massage.
4. Active physical therapy, including active range of
motion, exercise therapy and physical conditioning. Application of low
intensity ultrasound directed at the trigger point (this approach is used when
the trigger point is otherwise inaccessible).
5. Manipulation therapy.
6. Psychiatric evaluation and therapy.
7. A trial of oral non-steroid
analgesic/anti-inflammatory drugs, if not contraindicated.
8. Injection of local anesthetic, with or without
corticosteroid, into the muscle trigger points.
Trigger
point injections accompanied by appropriate adjunctive care should provide
moderate-to-long term benefits.
An
injection of a trigger point is considered medically necessary when it is
currently causing tenderness and/or weakness, restricting motion and/or causing
referred pain when compressed.
The
goal is to treat the cause of the pain and not just the symptom of pain.
Documentation Requirements
All
documentation must be maintained in the patient’s medical record and available
upon request.
Every
page of the record must be legible and include appropriate patient
identification information (e.g., complete name, dates of service(s)). The
record must include the physician or non-physician practitioner responsible for
and providing the care of the patient.
The
submitted medical record should support the use of the selected ICD-9-CM code(s).
The submitted CPT/HCPCS code should describe the service performed.
For
the treatment of established trigger points, the patient’s medical record must
have:
o Documentation
of the physical findings leading to diagnosis of the trigger point.
o Documentation
of the evaluation/ process of arriving at the diagnosis of the trigger point in
an individual muscle should be clearly documented in the patient’s medical
record
o The
reason for the trigger point injection, and whether it is being used as an initial
or subsequent treatment for myofascial pain, as well as the appropriate
diagnosis code should be documented.
o The
involved muscle group(s) must be documented in the patient’s medical record as
well as the number of trigger points injected. A diagram with an "X"
or other similar annotation is not adequate documentation.
o Documentation
of the reason(s) for selecting this therapeutic option.
o Diagnosis
codes from the “ICD-9-CM Codes that Support Medical Necessity” must be used to
support the specific muscles injected. Generalized diagnoses like low back
pain, lumbago, etc. will not be covered.
o If
a patient requires more than four (4) procedures of either CPT codes 20552 or
20553 during one year, a report stating the unusual circumstances and medical
necessity for giving the additional injections must be documented in the
patient's medical record.
o The health plan may request records when it is
apparent that patients are requiring a significant number of injections to
manage their pain.
o Documentation in the medical record must support the
medical necessity and frequency of the trigger point injection(s).
Limitations
Acupuncture
is not covered by Medicare, even if provided for the treatment of an
established trigger point. Use of acupuncture needles and/or the passage of
electrical current through these needles is not covered (whether an
acupuncturist or other provider renders the service). See your private health
plan policy for coverage.
Providers
of acupuncture services must inform the beneficiary that their services will
not be covered as acupuncture is not a Medicare benefit.
Medicare
does not cover Prolotherapy. Its billing under the trigger point injection code
is a misrepresentation of the actual service rendered.
"Dry
needling" of trigger points is a non-covered procedure since it is
considered unproven and investigational.
Coding Tips
Only
one code from 20552 or 20553 should be reported on any particular day, no
matter how many sites or regions are injected.
The
CPT codes for trigger point injections use the phrase "muscle
group(s)" as a group of muscles that are contiguous and that share a
common function, e.g., flexion, stabilization or extension of a joint. Trigger
points that exist in muscles that are widely separated anatomically and that
have different functions may be considered to be in separate muscle groups.
When a
given site is injected, it will be considered one injection service, regardless
of the number of injections administered.
Source: Centers for
Medicare and Medicaid Services Local and National Coverage Determinations