2027 ICD-10-CM Diagnosis Code L70.1Acne conglobata

ICD-10-CM Codes›L00–L99›L60-L75›L70

ICD-10-CM L70.1
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L70.1 is a billable ICD-10-CM diagnosis code for acne conglobata. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 606 through 607. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified inflammatory condition of skin.

Code Identity

ICD-10-CM Code
L70.1
Billable Status
Yes — Valid for Submission
Code Describes
Acne conglobata
Short Description
Acne conglobata
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 CodeL70.1Acne conglobata

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acne conglobata
  • Acne fulminans
  • Acne fulminans with erythema nodosum
  • Acne nodule
  • Cystic acne
  • Follicular occlusion tetrad - hidradenitis, acne conglobata, dissecting cellulitis, pilonidal sinus
  • Follicular occlusion triad - hidradenitis, acne conglobata, dissecting cellulitis of scalp
  • Nodulocystic acne

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L70.1: its own notes plus those printed at L70, block L60-L75, and Chapter 12. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block L60-L75 Disorders of skin appendages applies to 85 codes
  • congenital malformations of integument (Q84.-)

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.

From L70 Acne applies to 8 codes
From Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue applies to 1,001 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • lipomelanotic reticulosis (I89.8)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • viral warts (B07.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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

Clinical InformationClinical

  • Acne Conglobata

    severe and chronic form of acne characterized by large, burrowing abscesses associated with disfigurement.

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 L70.1 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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About L70.1Overview

What is the ICD-10 code for acne conglobata?

The ICD-10-CM code for acne conglobata is L70.1 (sometimes written as L701). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is L70.1 (Acne) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report acne conglobata on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does L70.1 group to?

When acne conglobata is the principal diagnosis on an inpatient stay, it groups to MS-DRG 607, 606, with relative weights from 0.8772 to 1.5721 depending on complications. Higher weights mean higher Medicare reimbursement.

Can L70.1 be reported with a code from Q84?

Not as a rule. The Excludes1 note at block L60-L75, which applies to L70.1, lists "congenital malformations of integument (Q84.-)". 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 L70.1?

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