2027 ICD-10-CM Diagnosis Code L65.1Anagen effluvium

ICD-10-CM Codes›L00–L99›L60-L75›L65

ICD-10-CM L65.1
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L65.1 is a billable ICD-10-CM diagnosis code for anagen effluvium. 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. Coders also document this condition as alopecia due to disturbance of hair cycle. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified skin disorders.

Code Identity

ICD-10-CM Code
L65.1
Billable Status
Yes — Valid for Submission
Code Describes
Anagen effluvium
Short Description
Anagen effluvium
Same as the full description in the CMS dataset.
Parent Code
L65
Other nonscarring hair loss

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL60-L75Disorders of skin appendages
CategoryL65Other nonscarring hair loss
This CodeL65.1Anagen effluvium

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Alopecia due to disturbance of hair cycle
  • Anagen effluvium
  • Anagen effluvium caused by drug
  • Drug-induced hair abnormality
  • Short anagen syndrome
  • Toxic anagen effluvium

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L65.1: its own notes plus those printed at L65, 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 L65 Other nonscarring hair loss applies to 5 codes
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 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.-)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From L65 Other nonscarring hair loss applies to 5 codes
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

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 SKN007
Other specified and unspecified skin disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Anagen Effluvium

    non-scarring alopecia arising during the growth (anagen) phase of the hair cycle. it may be associated with chemotherapy, exposure to radiation or heavy metals, poor nutrition, or various autoimmune conditions.

Patient EducationClinical

Hair Loss

You lose up to 100 hairs from your scalp every day. That's normal, and in most people, those hairs grow back. But many men -- and some women -- lose hair as they grow older. You can also lose your hair if you have certain diseases, such as thyroid problems, diabetes, or lupus.

Read the full article at MedlinePlus

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

Convert L65.1 to ICD-9-CMHistory

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

ICD-9-CM
704.09 Alopecia 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 L65.1Overview

What is the ICD-10 code for anagen effluvium?

The ICD-10-CM code for anagen effluvium is L65.1 (sometimes written as L651). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is L65.1 (Other nonscarring hair loss) a billable code?

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

What MS-DRG does L65.1 group to?

When anagen effluvium 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 L65.1 be reported with F63.3?

Not as a rule. The Excludes1 note at L65, which applies to L65.1, lists "trichotillomania (F63.3)". 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).

Does L65.1 need an additional code?

When the condition applies, yes. The Use Additional Code note at L65, which applies to L65.1, reads: code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5). The additional code is reported after L65.1.