2026 ICD-10-CM Diagnosis Code L70.4Infantile acne

ICD-10-CM Codes›L00–L99›L60-L75›L70

ICD-10-CM L70.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L70.4 is a billable ICD-10-CM diagnosis code for infantile acne. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607. The code is restricted by the Medicare Code Editor to pediatric patients (age 0 through 17). Coders also document this condition as acne. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified inflammatory condition of skin.

Code Identity

ICD-10-CM Code
L70.4
Billable Status
Yes — Valid for Submission
Code Describes
Infantile acne
Short Description
Infantile acne
Same as the full description in the CMS dataset.
Parent Code
L70
Acne

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL60-L75Disorders of skin appendages
CategoryL70Acne
This CodeL70.4Infantile acne

Code EditsBilling

Medicare Code Editor checks that affect claim validity for L70.4.

Pediatric diagnoses
The Medicare Code Editor detects inconsistencies in pediatric cases by checking a patient's age and any diagnosis on the patient's record. The pediatric code edits apply to patients age range is 0–17 years inclusive (e.g., Reye's syndrome, routine child health exam).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acne
  • Acne macule
  • Infantile acne
  • Neonatal acne
  • Pyoderma gangrenosum, acne, suppurative hidradenitis syndrome

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Acne
      • infantile
    • Acne
      • neonatal
    • Neonatal
      • acne
    • Newborn(infant) (liveborn) (singleton)
      • acne

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SKN002
Other specified inflammatory condition of skin
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Acne

Acne is a common skin disease that causes pimples. Pimples form when hair follicles under your skin clog up. Most pimples form on the face, neck, back, chest, and shoulders. Anyone can get acne, but it is common in teenagers and young adults. It is not serious, but it can cause scars.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert L70.4 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
706.1 Acne NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About L70.4Overview

Is L70.4 (Acne) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report infantile acne on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does L70.4 group to?

When infantile acne is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.

Who can L70.4 be reported for?

The Medicare Code Editor checks infantile acne against patient demographics: this code is intended for pediatric patients (age 0 through 17). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of L70.4?

Under the General Equivalence Mappings, infantile acne converts to ICD-9-CM 706.1 (acne NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.