Does M35.4 require prior authorization?

No, M35.4 does not require prior authorization (medium confidence). Covered without prior authorization by at least one policy, though another does not cover it.

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`M35.4`, Diffuse (eosinophilic) fasciitis

ICD-10-CM

Prior Authorization

No Prior Auth Required

Covered without prior authorization by at least one policy, though another does not cover it (medium confidence)

Documentation Required

The clinical history from the referral source must indicate the need for testing and the medical record must contain pertinent clinical information available for review upon request.
If an E/M service is separately billable, the medical record must document medical necessity for the separate E/M and the CPT must be billed with modifier 25.
When testing exceeds the reasonable maximum number of studies listed in the policy table, the physician must provide supplementary documentation justifying the additional testing.
Documentation must support the medical necessity of testing an asymptomatic contralateral limb when used to establish normative values.

Key Coverage Criteria

Nerve conduction studies (CPT 95907-95913) and/or needle electromyography (CPT 95860-95864, 95867-95872, 95885-95887) are covered when medically necessary to evaluate Carpal Tunnel Syndrome (unilateral).
Nerve conduction studies and/or needle EMG are covered when medically necessary to evaluate Carpal Tunnel Syndrome (bilateral).
Nerve conduction studies and/or needle EMG are covered when medically necessary to evaluate radiculopathy.
Nerve conduction studies and/or needle EMG are covered when medically necessary to evaluate mononeuropathy.
Nerve conduction studies and/or needle EMG are covered when medically necessary to evaluate polyneuropathy or mononeuropathy multiplex.
Needle EMG and nerve conduction studies are covered when medically necessary to evaluate myopathy.

20 Active Policies

CGS-J15-L35897, Nerve Conduction Studies and Electromyography

J15

CGS-J18-L35897, Nerve Conduction Studies and Electromyography

J18

A59434, Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Wound

WPS-J5-L34594, Nerve Conduction Studies and Electromyography

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M35.4, Diffuse (eosinophilic) fasciitis