HCPCS Level II M1198: Itch Severity Assessment Not Improved

HCPCS Level II code M1198 denotes that an itch severity assessment either failed to improve by at least three points from the index score to the follow-up visit or that the follow-up assessment was not completed. Nationally, this code is used to document inadequate treatment response or incomplete symptom reassessment in ambulatory dermatology and related care settings, with implications for quality measurement and care planning. Key payers reviewed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code’s clinical meaning, typical service context, and payer coverage landscape. The publication summarizes how the code is positioned within follow-up symptom assessment workflows, highlights common billing and documentation considerations, and outlines benchmarks and policy updates that affect payer reimbursement and reporting for follow-up assessments. The content also provides clinical context around the role of standardized itch severity scoring in monitoring treatment response and quality metrics. Data not available in the input is noted where specific payer policies, associated taxonomies, ICD-10 pairings, and related codes would ordinarily be listed.

Billing Code Overview

HCPCS Level II code M1198 indicates that an itch severity assessment score was not reduced by at least 3 points from the initial (index) score to the follow-up visit score or the assessment was not completed during the follow-up encounter. This code documents a lack of clinically meaningful improvement in itch severity or absence of a follow-up assessment.

Service type: Symptom severity assessment and follow-up evaluation for pruritus or related dermatologic symptom management
Typical site of service: Outpatient clinic or ambulatory care follow-up visit where symptom reassessment is performed

Clinical Context

A 58-year-old patient with chronic pruritus secondary to atopic dermatitis presents for a scheduled dermatology follow-up visit two months after initiation of a new systemic or topical therapy. During the follow-up encounter the clinician administers an itch severity assessment (for example a numeric rating scale 0–10 or validated pruritus scale) that was previously obtained at the index visit. The follow-up score does not show a reduction of at least 3 points from the index score, or the assessment is not completed during the visit (for example due to time constraints, acute issues taking precedence, or patient inability to complete the scale). The visit occurs in an outpatient dermatology clinic, specialty infusion center, or general medical clinic where pruritus management is being monitored. Documentation ordinarily includes the original index itch score, the follow-up itch score (or a note explaining why the assessment was not completed), current medications, treatment tolerability, and clinical decision-making regarding next steps. The billing code M1198 is used to indicate that the itch severity assessment score was not reduced by at least 3 points from index to follow-up, or that the assessment was not completed during the follow-up encounter.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work required is substantially greater than typically required for the visit due to complex documentation or extended counseling regarding persistent pruritus.

Taxonomy Code	Specialty	Notes
207RH0000X	Dermatology	Dermatologists most often perform pruritus assessment and management.
207Q00000X	Allergy & Immunology	Allergists evaluate pruritus when allergic or immunologic causes are suspected.
207L00000X	Internal Medicine (Dermatology-focused care)	Primary care and internal medicine clinicians manage chronic pruritus and follow-up assessments.
363LF0000X	Nurse Practitioner	NPs provide follow-up assessment and documentation of itch severity in outpatient settings.
363LA2200X	Physician Assistant	PAs commonly perform follow-up visits and symptom scoring for pruritus management.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`L29.8`	Other pruritus	Directly describes generalized or localized pruritus and is commonly used when assessing itch severity.
`L29.9`	Pruritus, unspecified	Used when the clinician documents pruritus without a specified underlying cause.
`L20.9`	Atopic dermatitis, unspecified	Chronic atopic dermatitis frequently causes significant pruritus requiring serial severity assessments.
`L30.9`	Dermatitis, unspecified	Broad dermatitis diagnosis associated with itching that may be tracked with itch scores.
`B07`	Viral warts	Included as a skin condition that may present with localized itching; less commonly the primary reason for itch scoring but occasionally relevant.
`K21.9`	Gastroesophageal reflux disease without esophagitis	Systemic or internal disease associations are occasionally evaluated when pruritus has unclear etiology; included as part of differential workup.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`99213`	Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes	Commonly used for mid-level follow-up visits where itch severity is reassessed and documented.
`99214`	Office or other outpatient visit for the evaluation and management of an established patient, typically 25 minutes	Used when the follow-up visit requires moderate to high complexity decision-making about persistent pruritus and medication adjustments.
`97110`	Therapeutic exercise (each 15 minutes)	May be billed when physical therapy interventions are provided adjunctively for conditions associated with pruritus or skin-related functional deficits.
`97012`	Application of a modality to 1 or more areas; traction, mechanical	Listed as an adjunctive modality sometimes used in multidisciplinary clinics; not routinely used for itch scoring.
`96365`	Intravenous infusion, initial, up to 1 hour	Relevant when systemic therapies administered by infusion for pruritus-related systemic treatments occur in the same encounter; documentation should link clinical need.

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Summary & Overview