2026 ICD-10-CM Diagnosis Code Q84.2Other congenital malformations of hair

ICD-10-CM Codes›Q00-Q99›Q80-Q89›Q84

ICD-10-CM Q84.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q84.2 is a billable ICD-10-CM diagnosis code for other congenital malformations of hair. 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
Q84.2
Billable Status
Yes — Valid for Submission
Code Describes
Other congenital malformations of hair
Short Description
Other congenital malformations of hair
Same as the full description in the CMS dataset.
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 CodeQ84.2Other congenital malformations of hair

Present on Admission (POA)Billing

Q84.2 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.

  • Amaurosis hypertrichosis syndrome
  • Autosomal dominant preaxial polydactyly, upper back hypertrichosis syndrome
  • BIDS brittle hair-impaired intellect-decreased fertility-short stature syndrome
  • Congenital anomaly of hair
  • Congenital cataract with hypertrichosis and intellectual disability syndrome
  • Congenital generalized hypertrichosis
  • Congenital hypertrichosis
  • Congenital hypertrichosis lanuginosa
  • Congenital leukonychia
  • Curly hair, acral keratoderma, caries syndrome
  • Dermotrichic syndrome
  • Disturbance of hair cycle
  • Facial dysmorphism, hypertrichosis, epilepsy, intellectual disability/developmental delay, gingival overgrowth syndrome
  • Genetic defect of hair shaft
  • Genetic syndrome with hypermelanosis
  • Hair defect with photosensitivity and intellectual disability syndrome
  • Hair discoloration
  • Hypertrichosis cubiti
  • Hypertrichosis lanuginosa
  • Hypertrichosis with congenital macrogingivae
  • Intellectual disability, polydactyly, uncombable hair syndrome
  • Isolated anterior cervical hypertrichosis
  • Keratosis pilaris
  • Keratosis pilaris atrophicans
  • Lanugo
  • Leukonychia totalis
  • Leukonychia totalis, acanthosis-nigricans-like lesions, abnormal hair syndrome
  • Loose anagen hair syndrome
  • Manitoba oculotrichoanal syndrome
  • Multiple malformation syndrome, moderate short stature, facial
  • Non-androgenic hypertrichosis with genetic disease
  • Noonan syndrome-like disorder with loose anagen hair
  • Oculotrichodysplasia
  • Oliver McFarlane syndrome
  • Onycho-tricho-dysplasia neutropenia syndrome
  • Osteopathia striata
  • Osteopathia striata, pigmentary dermopathy, white forelock syndrome
  • Osteopenia, intellectual disability, sparse hair syndrome
  • Persistent lanugo
  • Photosensitivity with ichthyosis, brittle hair, impaired intelligence, decreased fertility and short stature syndrome
  • Poliosis
  • Sabinas brittle hair syndrome
  • Taenzer's hair
  • Trichodysplasia xeroderma syndrome
  • Trichohepatoenteric syndrome
  • Trichothiodystrophy
  • Ulerythema ophryogenes
  • Uncombable hair syndrome
  • Variation in hair color
  • White forelock
  • White forelock with malformations syndrome
  • Wiedemann Steiner syndrome
  • X-linked congenital generalized hypertrichosis

Tabular List NotesGuidance

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

Inclusion Terms

  • Congenital hypertrichosis
  • Congenital malformation of hair NOS
  • Persistent lanugo

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.

    • Anomaly, anomalous(congenital) (unspecified type)
      • hair
    • Canities(premature)
      • congenital
    • Grayness, hair(premature)
      • congenital
    • Hypertrichosis
      • congenital
    • Hypertrichosis
      • lanuginosa
    • Hypoplasia, hypoplastic
      • hair
    • Malformation(congenital)
      • hair
    • Persistence, persistent(congenital)
      • lanugo
    • Ulerythema
      • ophryogenes, congenital

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

Clinical InformationClinical

  • Loose Anagen Hair Syndrome

    benign childhood alopecia that improves spontaneously with aging. it is characterized by anagen hairs (misshapen hair bulbs and absent inner and outer root sheaths), thin, and sparse hairs that pulls out easily.

  • Lanugo

    fine downy hair that covers the body of a human fetus beginning in the fifth month of gestation; it is usually shed by the ninth month of gestation.

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 Q84.2 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 Q84.2Overview

Is Q84.2 (Other congenital malformations of integument) a billable code?

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

What MS-DRG does Q84.2 group to?

When other congenital malformations of hair 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 Q84.2 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 other congenital malformations of hair on inpatient claims.

What is the ICD-9 equivalent of Q84.2?

Under the General Equivalence Mappings, other congenital malformations of hair 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.