2026 ICD-10-CM Diagnosis Code Q84.1Congenital morphological disturbances of hair, not elsewhere classified

ICD-10-CM Codes›Q00-Q99›Q80-Q89›Q84

ICD-10-CM Q84.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q84.1 is a billable ICD-10-CM diagnosis code for congenital morphological disturbances of hair, not elsewhere classified. 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 exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified congenital anomalies.

Code Identity

ICD-10-CM Code
Q84.1
Billable Status
Yes — Valid for Submission
Code Describes
Congenital morphological disturbances of hair, not elsewhere classified
Short Description
Congenital morphological disturbances of hair, NEC
Parent Code
Q84
Other congenital malformations of integument

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ80-Q89Other congenital malformations
CategoryQ84Other congenital malformations of integument
This CodeQ84.1Congenital morphological disturbances of hair, not elsewhere classified

Present on Admission (POA)Billing

Q84.1 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Autosomal dominant familial wooly hair
  • Autosomal recessive familial wooly hair
  • Bayonet hair
  • Beaded hair
  • Björnstad syndrome
  • Black locks, oculocutaneous albinism, AND deafness of the sensorineural type
  • Congenital dysplasia of nail unit
  • Congenital ringed hair
  • Congenital wooly hair
  • Curly hair, ankyloblepharon, nail dysplasia syndrome
  • Ectodermal dysplasia, syndactyly and pili torti
  • Pili annulati
  • Pili torti
  • Pili torti onychodysplasia syndrome
  • Pili torti with developmental delay and neurological abnormality syndrome
  • Skin fragility, wooly hair, palmoplantar keratoderma syndrome
  • Trichostasis spinulosa
  • Uncombable hair, retinal pigmentary dystrophy, dental anomaly and brachydactyly syndrome
  • Wooly hair and palmoplantar keratoderma with dilated cardiomyopathy syndrome
  • Wooly hair with palmoplantar keratoderma syndrome

Tabular List NotesGuidance

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

Inclusion Terms

  • Beaded hair
  • Monilethrix
  • Pili annulati

Type 1 Excludes

  • Menkes' kinky hair syndrome E83.09

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.

    • Beaded hair(congenital)
    • Monilethrix(congenital)
    • Pili
      • annulati or torti (congenital)
    • Ringed hair(congenital)
    • Thrix annulata(congenital)
    • Trichostasis spinulosa(congenital)
    • Twist, twisted
      • hair (congenital)
    • Woolly, wooly hair(congenital) (nevus)

Clinical ClassificationClinical

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

CCSR MAL010
Other specified and unspecified congenital anomalies
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Hair Problems

The average person has 5 million hairs. Hair grows all over your body except on your lips, palms, and the soles of your feet. It takes about a month for healthy hair to grow half an inch. Most hairs grow for up to six years and then fall out. New hairs grow in their place.

Read the full article at MedlinePlus

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

Convert Q84.1 to ICD-9-CMHistory

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

ICD-9-CM
757.4 Hair anomalies 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 Q84.1Overview

Is Q84.1 (Other congenital malformations of integument) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report congenital morphological disturbances of hair, not elsewhere classified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does Q84.1 group to?

When congenital morphological disturbances of hair, not elsewhere classified 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.

Is Q84.1 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for congenital morphological disturbances of hair, not elsewhere classified on inpatient claims.

What is the ICD-9 equivalent of Q84.1?

Under the General Equivalence Mappings, congenital morphological disturbances of hair, not elsewhere classified converts to ICD-9-CM 757.4 (hair anomalies 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.