2027 ICD-10-CM Diagnosis Code F42.4Excoriation (skin-picking) disorder
ICD-10-CM Codes›F01–F99›F40-F48›F42
- Billable — Valid for Submission
- Chronic Condition
F42.4 is a billable ICD-10-CM diagnosis code for excoriation (skin-picking) disorder. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 882. Coders also document this condition as body-focused repetitive behavior disorder. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Obsessive-compulsive and related disorders.
F42.4 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 133 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
F42.4 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Body-focused repetitive behavior disorder
- Excoriation disorder
- Picking own skin
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to F42.4: its own notes plus those printed at F42 and Chapter 5. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- disorders of psychological development
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name F42.4, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming F42.4: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 4
These codes carry an Excludes2 note naming F42.4: its condition is not part of those codes, and both may be reported when the patient has both.
- F60.5 Obsessive-compulsive personality disorderobsessive-compulsive disorder (F42.-) names F42.-, which includes this code
- F98 Other behavioral and emotional disorders with onset usually occurring in childhood and adolescenceobsessive-compulsive disorder (F42.-) names F42.-, which includes this code
- F98.4 Stereotyped movement disorderscompulsions in obsessive-compulsive disorder (F42.-) names F42.-, which includes this code
- F93.0 Separation anxiety disorder of childhood
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disorder (of) See Also: Disease;
Excoriation (traumatic) See Also: Abrasion;
skin picking disorder F42.4
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Excoriation Disorder
compulsion to pick one's skin.
Patient EducationClinical
Obsessive-Compulsive Disorder
Obsessive-compulsive disorder (OCD) is a mental disorder in which you have thoughts (obsessions) and rituals (compulsions) over and over. They interfere with your life, but you cannot control or stop them.
The full article covers:
- What is obsessive-compulsive disorder (OCD)?
- What causes obsessive-compulsive disorder (OCD)?
- Who is at risk for obsessive-compulsive disorder (OCD)?
- What are the symptoms of obsessive-compulsive disorder (OCD)?
- How is obsessive-compulsive disorder (OCD) diagnosed?
- What are the treatments for obsessive-compulsive disorder (OCD)?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert F42.4 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code History & ChangesHistory
Replacement F42.4 replaces the following previously assigned code(s):
- L98.1 - Factitial dermatitis
Questions About F42.4Overview
What is the ICD-10 code for excoriation (skin-picking) disorder?
The ICD-10-CM code for excoriation (skin-picking) disorder is F42.4 (sometimes written as F424). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is F42.4 (Obsessive-compulsive disorder) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report excoriation (skin-picking) disorder on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does F42.4 group to?
When excoriation (skin-picking) disorder is the principal diagnosis on an inpatient stay, it groups to MS-DRG 882 (neuroses Except Depressive), which carries a relative weight of 0.9953. Higher weights mean higher Medicare reimbursement.
Can F42.4 be reported with L98.1?
Not as a rule. The Excludes1 note on F42.4 lists "factitial dermatitis (L98.1)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of F42.4?
Under the General Equivalence Mappings, excoriation (skin-picking) disorder converts to ICD-9-CM 306.3 (psychogenic skin disease). The mapping is approximate, so confirm the match fits the documentation.
Does F42.4 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage: F42.4 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 133 (Anxiety and Other Psychiatric Disorders).
