Does M21.379 require prior authorization?

No, M21.379 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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`M21.379`, Foot drop, unspecified foot

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

Medical records must clearly document medical necessity for each test and include the reason for referral and a clear diagnostic impression.
Data gathered during NCS should be available showing actual numeric results (latency, amplitude, etc.), preferably in tabular format.
In cases of review, provide a hard copy of waveforms or a complete written report with interpretation upon request.
Normal findings and abnormalities must document muscles tested, presence and type of spontaneous activity, characteristics of voluntary motor unit potentials, and interpretation.

Key Coverage Criteria

NC-stat testing (CPT 95905) is allowed when the beneficiary has a high pre-test or prior probability of Carpal Tunnel Syndrome (CTS), limited to one service per arm.
Use CPT 95870 for sampling muscles other than the paraspinals associated with the extremities that have been tested.
No specific clinical indications are provided in this billing and coding article; coverage criteria for amniotic and placental-derived product injections/applications for musculoskeletal non-wound indications are described in Local Coverage Determination L39116.
Coverage for amniotic and placental-derived product injections/applications for musculoskeletal, non-wound indications is determined by Local Coverage Determination L39139; consult LCD L39139 for specific clinical indications and thresholds.
Coverage applies when the amniotic or placental-derived product injection/application meets the reasonable and necessary requirements of Local Coverage Determination L39877.
Amniotic and placental-derived product injections/applications are covered only when they meet the reasonable and necessary clinical requirements specified in LCD L39879 (Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Wound).

11 Active Policies

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

A58893, Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Wound

NGS-J6-L35098, Nerve Conduction Studies and Electromyography

A57668, Billing and Coding: Nerve Conduction Studies and Electromyography

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M21.379, Foot drop, unspecified foot