2026 ICD-10-CM Diagnosis Code E30.1Precocious puberty

ICD-10-CM Codes›E00–E89›E20-E35›E30

ICD-10-CM E30.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E30.1 is a billable ICD-10-CM diagnosis code for precocious puberty. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 643 through 645. The code is restricted by the Medicare Code Editor to pediatric patients (age 0 through 17). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified endocrine disorders.

Code Identity

ICD-10-CM Code
E30.1
Billable Status
Yes — Valid for Submission
Code Describes
Precocious puberty
Short Description
Precocious puberty
Same as the full description in the CMS dataset.
Parent Code
E30
Disorders of puberty, not elsewhere classified

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE20-E35Disorders of other endocrine glands
CategoryE30Disorders of puberty, not elsewhere classified
This CodeE30.1Precocious puberty

Code EditsBilling

Medicare Code Editor checks that affect claim validity for E30.1.

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.

  • Adrenal hyperfunction
  • Adrenocortical hyperfunction
  • Congenital anomaly of endocrine testis
  • Cryptogenic sexual precocity
  • Early menarche
  • Endocrine disorder related to puberty
  • Familial male-limited precocious puberty
  • Female puberty disorder
  • Finding of secondary sexual hair growth
  • Gonadotropin independent precocious puberty
  • Heterosexual precocious puberty
  • Isosexual precocious puberty
  • Menarche
  • Peripheral precocious puberty due to hyperestrogenism
  • Physical precocity
  • Precocious female puberty
  • Precocious pubarche
  • Precocious puberty
  • Precocious puberty with adrenal hyperplasia
  • Precocious puberty with adrenocortical hyperfunction
  • Premature growth of secondary sexual hair
  • Spastic paraplegia with precocious puberty syndrome

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Precocious menstruation

Type 1 Excludes

  • Albright -McCune -Sternberg syndrome Q78.1
  • central precocious puberty E22.8
  • congenital adrenal hyperplasia E25.0
  • female heterosexual precocious pseudopuberty E25
  • male isosexual precocious pseudopuberty E25

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.

    • Breast
      • buds
    • Buds
      • breast
    • Development
      • sexual, precocious NEC
    • Menarche
      • precocious
    • Menstruation
      • precocious
    • Precocious
      • adrenarche
    • Precocious
      • menarche
    • Precocious
      • menstruation
    • Precocious
      • pubarche
    • Precocious
      • puberty
    • Precocious
      • sexual development NEC
    • Precocity, sexual(constitutional) (cryptogenic) (female) (idiopathic) (male)
    • Premature
      • puberty
    • Pubarche, precocious
    • Pubertas praecox
    • Puberty(development state)
      • precocious (constitutional) (cryptogenic) (idiopathic)
    • Puberty(development state)
      • premature
    • Sexual
      • precocity (constitutional) (cryptogenic) (female) (idiopathic) (male)

Clinical ClassificationClinical

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

CCSR END015
Other specified and unspecified endocrine disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Menarche

    the first menstrual cycle marked by the initiation of menstruation.

  • Adrenocortical Hyperfunction

    excess production of adrenal cortex hormones such as aldosterone; hydrocortisone; dehydroepiandrosterone; and/or androstenedione. hyperadrenal syndromes include cushing syndrome; hyperaldosteronism; and virilism.

  • Age at Menarche|MENARAGE|Menarche Age|Menarche Age

    age of an individual at their first menstruation.

  • Post-menarchal|Post-menarcheal|Post-menarchial|Postmenarchal|Postmenarcheal|Postmenarchial

    after first menstruation (menarche).

  • Age at Menarche|MENARAGE|Menarche Age|Menarche Age

    age of first menstruation. a risk factor for breast cancer

  • Isolated Premature Menarche|Premature Menarche

    occurrence of the first menstrual period in a girl before the lower limit of the normal age range for the reference population, without other signs of puberty.

  • Menarche

    onset of menses.

  • Premature Menarche

    occurrence of the first menstrual period in a female before the usual or expected age.

  • Primary Amenorrhea|Delayed Menarche|Delayed Menarche

    abnormally late or absent menarche in a female with normal secondary sexual characteristics.

  • Menarche Indicator|MENARIND

    an indication as to whether the individual's first menstruation event has occurred.

Patient EducationClinical

Puberty

Puberty is the time in life when a boy or girl becomes sexually mature. It is a process that usually happens between ages 10 and 14 for girls and ages 12 and 16 for boys. It causes physical changes, and affects boys and girls differently.

Read the full article at MedlinePlus

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

Convert E30.1 to ICD-9-CMHistory

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

ICD-9-CM
259.1 Sexual precocity 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 E30.1Overview

Is E30.1 (Disorders of puberty, not elsewhere classified) a billable code?

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

What MS-DRG does E30.1 group to?

When precocious puberty is the principal diagnosis on an inpatient stay, it groups to MS-DRG 643, 644, 645, with relative weights from 0.7683 to 1.6461 depending on complications. Higher weights mean higher Medicare reimbursement.

Who can E30.1 be reported for?

The Medicare Code Editor checks precocious puberty 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 E30.1?

Under the General Equivalence Mappings, precocious puberty converts to ICD-9-CM 259.1 (sexual precocity NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.