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ICD-10-CM T20.57XD, Corrosion of first degree of neck, subsequent encounter | No Prior Auth

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`T20.57XD`, Corrosion of first degree of neck, subsequent encounter

ICD-10-CM

Prior Authorization

No Prior Auth Required

Covered without prior authorization (high confidence)

Documentation Required

Medical records must include history and physical notes, laboratory results, and documentation of signs and symptoms that warrant the head/neck diagnostic imaging.
Accurate HCPCS/CPT coding must be submitted to differentiate CT and MRI scans from other radiology services and to support coverage determinations.
Documentation and supporting information must be available to Medicare upon request.
Providers should check and apply Correct Coding Initiative (CCI) edits and applicable LCD guidance for correct code combinations before billing.

Key Coverage Criteria

CT or MRI scans of the head or neck are covered when the medical record documents the scan is reasonable and necessary for diagnostic evaluation.
Coverage requires documentation supporting clinical indication such as history and physical exam findings, laboratory results, and signs or symptoms that justify the diagnostic test.
No specific clinical indications are listed in this article; follow the Local Coverage Determination (LCD) L39400 for indications for magnesium testing or services.

2 Active Policies

A57204, Billing and Coding: MRI and CT Scans of the Head and Neck

A59186, Billing and Coding: Magnesium

Related Codes

C13.8(2 policies)C15.5(2 policies)C13.1(2 policies)C13.2(2 policies)C15.3(2 policies)C15.4(2 policies)C13.0(2 policies)C76.0(2 policies)

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The article provides billing/coding guidance that complements LCD L39400; use the documentation, prior authorization, and claim submission requirements specified in LCD L39400 and the local contractor's instructions.