2026 ICD-10-CM Diagnosis Code Q75.8Other specified congenital malformations of skull and face bones

ICD-10-CM Codes›Q00-Q99›Q65-Q79›Q75

ICD-10-CM Q75.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q75.8 is a billable ICD-10-CM diagnosis code for other specified congenital malformations of skull and face bones. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 564 through 566. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Musculoskeletal congenital conditions.

Code Identity

ICD-10-CM Code
Q75.8
Billable Status
Yes — Valid for Submission
Code Describes
Other specified congenital malformations of skull and face bones
Short Description
Oth congenital malformations of skull and face bones
Parent Code
Q75
Other congenital malformations of skull and face bones

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ65-Q79Congenital malformations and deformations of the musculoskeletal system
CategoryQ75Other congenital malformations of skull and face bones
This CodeQ75.8Other specified congenital malformations of skull and face bones

Present on Admission (POA)Billing

Q75.8 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.

  • 3C syndrome
  • Absence of skull bone
  • Acrania
  • Acrocephalopolydactyly
  • Agenesis of nasal bone
  • Agenesis of premaxilla
  • Agenesis of vomer
  • Anterior perimaxillary faciosynostosis
  • Anterior pituitary hormone deficiency
  • Aplasia of bone of cranium
  • Aplasia of nasal bone
  • Aplasia of premaxilla
  • Basilar skull invagination
  • Bathrocephaly
  • Bilateral craniofacial microsomia
  • Bipartite ossification
  • Bipartite ossification of interparietal bone
  • Bipartite ossification of supraoccipital bone
  • Cheilognathoprosoposchisis
  • Choanal atresia
  • Choanal atresia, hearing loss, cardiac defect, craniofacial dysmorphism syndrome
  • Cleft mandible
  • Cloverleaf skull syndrome
  • Cloverleaf skull with multiple congenital anomalies syndrome
  • Complete perimaxillary faciosynostosis
  • Complex craniosynostosis
  • Congenital abnormal fusion of alisphenoid bone
  • Congenital abnormal fusion of basioccipital bone
  • Congenital abnormal fusion of basisphenoid bone
  • Congenital abnormal fusion of exoccipital bone
  • Congenital abnormal fusion of frontal bone
  • Congenital abnormal fusion of interparietal bone
  • Congenital abnormal fusion of parietal bone
  • Congenital abnormal fusion of premaxilla
  • Congenital abnormal fusion of presphenoid bone
  • Congenital abnormal fusion of squamosal bone
  • Congenital abnormal fusion of supraoccipital bone
  • Congenital abnormal fusion of tympanic anulus
  • Congenital abnormal fusion of vomer
  • Congenital abnormal fusion of zygomatic bone
  • Congenital abnormal shape of alisphenoid bone
  • Congenital abnormal shape of basioccipital bone
  • Congenital abnormal shape of basisphenoid bone
  • Congenital abnormal shape of exoccipital bone
  • Congenital abnormal shape of frontal bone
  • Congenital abnormal shape of interparietal bone
  • Congenital abnormal shape of nasal bone
  • Congenital abnormal shape of parietal bone
  • Congenital abnormal shape of premaxilla
  • Congenital abnormal shape of presphenoid bone
  • Congenital abnormal shape of squamosal bone
  • Congenital abnormal shape of supraoccipital bone
  • Congenital abnormal shape of tympanic anulus
  • Congenital abnormal shape of vomer
  • Congenital abnormal shape of zygomatic bone
  • Congenital abnormality of skull shape
  • Congenital absence of alisphenoid bone
  • Congenital absence of basioccipital bone
  • Congenital absence of basisphenoid bone
  • Congenital absence of cranial vault
  • Congenital absence of exoccipital bone
  • Congenital absence of frontal bone
  • Congenital absence of interparietal bone
  • Congenital absence of nasal bone
  • Congenital absence of nasal septum
  • Congenital absence of parietal bone
  • Congenital absence of premaxilla
  • Congenital absence of presphenoid bone
  • Congenital absence of skull bone
  • Congenital absence of squamosal bone
  • Congenital absence of supraoccipital bone
  • Congenital absence of tympanic anulus
  • Congenital absence of vomer
  • Congenital absence of zygomatic bone
  • Congenital anomaly of alisphenoid bone
  • Congenital anomaly of basioccipital bone
  • Congenital anomaly of basisphenoid bone
  • Congenital anomaly of craniovertebral junction
  • Congenital anomaly of exoccipital bone
  • Congenital anomaly of frontal bone
  • Congenital anomaly of interparietal bone
  • Congenital anomaly of lacrimal bone
  • Congenital anomaly of nasal bone
  • Congenital anomaly of palatine bone
  • Congenital anomaly of parietal bone
  • Congenital anomaly of premaxilla
  • Congenital anomaly of presphenoid bone
  • Congenital anomaly of squamosal bone
  • Congenital anomaly of supraoccipital bone
  • Congenital anomaly of tympanic anulus
  • Congenital anomaly of vomer
  • Congenital anomaly of zygomatic bone
  • Congenital asymmetry of forehead
  • Congenital deformity of forehead
  • Congenital dyserythropoietic anemia
  • Congenital enlargement of fontanel
  • Congenital facial asymmetry
  • Congenital fenestration of alisphenoid bone
  • Congenital fenestration of basioccipital bone
  • Congenital fenestration of basisphenoid bone
  • Congenital fenestration of exoccipital bone
  • Congenital fenestration of frontal bone
  • Congenital fenestration of interparietal bone
  • Congenital fenestration of nasal bone
  • Congenital fenestration of parietal bone
  • Congenital fenestration of premaxilla
  • Congenital fenestration of presphenoid bone
  • Congenital fenestration of squamosal bone
  • Congenital fenestration of supraoccipital bone
  • Congenital hypertrophy of sphenoid bone
  • Congenital hypoplasia of alisphenoid bone
  • Congenital hypoplasia of anterior pituitary
  • Congenital hypoplasia of basioccipital bone
  • Congenital hypoplasia of basisphenoid bone
  • Congenital hypoplasia of bilateral zygomatic bones
  • Congenital hypoplasia of bone of cranium
  • Congenital hypoplasia of carotid canal
  • Congenital hypoplasia of clavicle
  • Congenital hypoplasia of exoccipital bone
  • Congenital hypoplasia of frontal bone
  • Congenital hypoplasia of interparietal bone
  • Congenital hypoplasia of lacrimal bone
  • Congenital hypoplasia of left zygomatic bone
  • Congenital hypoplasia of nasal septum
  • Congenital hypoplasia of parietal bone
  • Congenital hypoplasia of premaxilla
  • Congenital hypoplasia of presphenoid bone
  • Congenital hypoplasia of right zygomatic bone
  • Congenital hypoplasia of squamosal bone
  • Congenital hypoplasia of supraoccipital bone
  • Congenital hypoplasia of tympanic anulus
  • Congenital hypoplasia of vomer
  • Congenital hypoplasia of zygomatic bone
  • Congenital J shaped sella turcica
  • Congenital malformation of anterior pituitary
  • Congenital malformation of sphenoid wing
  • Craniofacial cleft
  • Craniofacial conodysplasia syndrome
  • Craniofacial dysplasia osteopenia syndrome
  • Craniofacial microsomia
  • Craniofaciofrontodigital syndrome
  • Craniolacunia
  • Craniolenticulosutural dysplasia
  • Cranioosteoarthropathy
  • Cranioschisis
  • Cytochrome-c oxidase deficiency
  • Defect of skull ossification
  • Delayed membranous cranial ossification
  • Disorder of lacrimal bone
  • Domed head
  • Doughnut lesion of calvaria and bone fragility syndrome
  • Endosteal hyperostoses
  • Enlarged parietal foramina
  • Exocrine pancreatic insufficiency
  • Frontal bossing
  • Frontal dysostosis
  • Frontonasal dysplasia sequence
  • Frontonasal dysplasia, bifid nose, upper limb anomalies syndrome
  • Frontorhiny
  • Hyperostosis cranialis interna
  • Hypertelorism
  • Incomplete ossification of alisphenoid bone
  • Incomplete ossification of basioccipital bone
  • Incomplete ossification of basisphenoid bone
  • Incomplete ossification of exoccipital bone
  • Incomplete ossification of frontal bone
  • Incomplete ossification of interparietal bone
  • Incomplete ossification of nasal bone
  • Incomplete ossification of palatine bone
  • Incomplete ossification of parietal bone
  • Incomplete ossification of premaxilla
  • Incomplete ossification of presphenoid bone
  • Incomplete ossification of skull
  • Incomplete ossification of squamosal bone
  • Incomplete ossification of supraoccipital bone
  • Incomplete ossification of tympanic anulus
  • Incomplete ossification of zygomatic bone
  • Infraorbital facial cleft - Tessier cleft 4
  • Infraorbital facial cleft - Tessier cleft 5
  • Infraorbital facial cleft - Tessier cleft 6
  • Infraorbital facial cleft - Tessier cleft 7
  • Intellectual disability, craniofacial dysmorphism, cryptorchidism syndrome
  • Lack of ossification of alisphenoid bone
  • Lack of ossification of basioccipital bone
  • Lack of ossification of basisphenoid bone
  • Lack of ossification of exoccipital bone
  • Lack of ossification of frontal bone
  • Lack of ossification of interparietal bone
  • Lack of ossification of nasal bone
  • Lack of ossification of palatine bone
  • Lack of ossification of parietal bone
  • Lack of ossification of premaxilla
  • Lack of ossification of presphenoid bone
  • Lack of ossification of squamosal bone
  • Lack of ossification of supraoccipital bone
  • Lack of ossification of tympanic anulus
  • Lack of ossification of zygomatic bone
  • Leptocephaly
  • Localized congenital skull defect
  • MacDermot Winter syndrome
  • Metopic ridging, ptosis, facial dysmorphism syndrome
  • Microbrachycephaly, ptosis, cleft lip syndrome
  • Midline facial cleft - Tessier cleft 0
  • Midline facial cleft - Tessier cleft 14
  • Midline facial cleft - Tessier cleft 30
  • Occipital dysplasia
  • Osteosclerosis
  • Overgrowth, macrocephaly, facial dysmorphism syndrome
  • Overriding skull bones
  • Pancreatic insufficiency
  • Pancreatic insufficiency, dyserythropoietic anemia, calvarial hyperostosis syndrome
  • Paramedian facial cleft - Tessier cleft 1
  • Paramedian facial cleft - Tessier cleft 2
  • Paramedian facial cleft - Tessier cleft 3
  • Parietal foramina with clavicular hypoplasia
  • Parieto-occipital craniosynostosis
  • Platybasia
  • Posterior perimaxillary faciosynostosis
  • Robin sequence
  • Sagittal craniosynostosis
  • Short stature, Pierre Robin sequence, cleft mandible, hand anomalies, clubfoot syndrome
  • Short stature, pituitary and cerebellar defect and small sella turcica syndrome
  • Short stature, wormian bones, dextrocardia syndrome
  • SIX2-related frontonasal dysplasia
  • Spheno-fronto-parietal craniofaciosynostosis
  • Supraorbital facial cleft - Tessier cleft 10
  • Supraorbital facial cleft - Tessier cleft 11
  • Supraorbital facial cleft - Tessier cleft 12
  • Supraorbital facial cleft - Tessier cleft 13
  • Supraorbital facial cleft - Tessier cleft 8
  • Supraorbital facial cleft - Tessier cleft 9
  • Vomero-premaxillary faciosynostosis
  • Wormian bone of cranium
  • X-linked intellectual disability, craniofacioskeletal syndrome

Tabular List NotesGuidance

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

Inclusion Terms

  • Absence of skull bone, congenital
  • Congenital deformity of forehead
  • Platybasia

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.

    • Absence(of) (organ or part) (complete or partial)
      • skull bone (congenital)
    • Accessory(congenital)
      • face bone (s)
    • Accessory(congenital)
      • frontonasal process
    • Agenesis
      • face
        • bones NEC
    • Agenesis
      • roof of orbit
    • Agenesis
      • skull (bone)
    • Anomaly, anomalous(congenital) (unspecified type)
      • forehead
    • Bird
      • face
    • Caput
      • crepitus
    • Craniofenestria(skull)
    • Craniolacunia(skull)
    • Cranioschisis
    • Crepitus
      • caput
    • Deformity
      • forehead (acquired)
        • congenital
    • Deformity
      • frontal bone (acquired)
        • congenital
    • Deformity
      • head (acquired)
        • congenital
    • Deformity
      • skull (acquired)
        • congenital
    • Diastasis
      • cranial bones
        • congenital NEC
    • Distortion(s) (congenital)
      • face bone (s) NEC
    • Distortion(s) (congenital)
      • skull bone (s) NEC
    • Duplication, duplex
      • frontonasal process
    • Hyperostosis(monomelic)
      • skull
        • congenital
    • Hypoplasia, hypoplastic
      • bone NOS
        • face
    • Hypoplasia, hypoplastic
      • face
        • bone (s)
    • Hypoplasia, hypoplastic
      • skull (bone)
    • Imperfect
      • closure (congenital)
        • roof of orbit
    • Impression, basilar
    • Lacunar skull
    • Maldevelopment
      • mastoid process
    • Malformation(congenital)
      • bone
        • face
          • specified type NEC
    • Malformation(congenital)
      • bone
        • skull
          • specified type NEC
    • Ostrum-Furst syndrome
    • Platybasia
    • Stenocephaly

Clinical ClassificationClinical

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

CCSR MAL008
Musculoskeletal congenital conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Choanal Atresia

    a congenital abnormality that is characterized by a blocked choanae, the opening between the nose and the nasopharynx. blockage can be unilateral or bilateral; bony or membranous.

  • Hypertelorism

    abnormal increase in the interorbital distance due to overdevelopment of the lesser wings of the sphenoid.

  • Exocrine Pancreatic Insufficiency

    a malabsorption condition resulting from greater than 10% reduction in the secretion of pancreatic digestive enzymes (lipase; proteases; and amylase) by the exocrine pancreas into the duodenum. this condition is often associated with cystic fibrosis and with chronic pancreatitis.

  • Osteopetrosis

    excessive formation of dense trabecular bone leading to pathological fractures; osteitis; splenomegaly with infarct; anemia; and extramedullary hemopoiesis (hematopoiesis, extramedullary).

  • Osteosclerosis

    an abnormal hardening or increased density of bone tissue.

  • Platybasia

    a developmental deformity of the occipital bone and upper end of the cervical spine, in which the latter appears to have pushed the floor of the occipital bone upward. (dorland, 27th ed)

  • Facial Asymmetry

    a finding indicating the absence of balanced proportions between parts of the face.

  • Osteosclerosis

    abnormally high bone density.

  • CDAN1 Gene|CDAN1|CDAN1|Congenital Dyserythropoietic Anemia, Type I Gene

    this gene may be involved in nuclear membrane maintenance.

  • CDAN1 wt Allele|CDA-I|CDA1|CDAI|Codanin Gene|Congenital Dyserythropoietic Anemia, Type I wt Allele|DLT|Discs Lost Homolog Gene|Discs Lost, Drosophila, Homolog of Gene|PRO1295|UNQ664/PRO1295

    human cdan1 wild-type allele is located in the vicinity of 15q15.2 and is approximately 14 kb in length. this allele, which encodes codanin-1 protein, may play a role in the maintenance of the nuclear envelope. mutation of the gene is associated with congenital dyserythropoietic anemia type i.

  • Congenital Dyserythropoietic Anemia

    a rare group of disorders that result in anemia that is caused by ineffective erythropoiesis, which is associated with multinuclear erythroblasts, and which may present in childhood. the most common mutations are in the cdan1 and sec23b genes.

  • Congenital Dyserythropoietic Anemia Type II|CDA II|CDAN2|HEMPAS|Hereditary Erythroblastic Multinuclearity with Positive Acidified-Serum Test|SEC23B-CDG

    an autosomal recessive subtype of congenital dyserythropoietic anemia caused by mutation(s) in the sec23b gene, encoding protein transport protein sec23b.

  • Congenital Dyserythropoietic Anemia Type IV|CDAN4

    an autosomal dominant sub-type of congenital dyserythropoietic anemia caused by mutation(s) in the klf1 gene, encoding krueppel-like factor 1.

  • SEC23B wt Allele|CDA-II|CDAII|CDAN2|Congenital Dyserythropoietic Anemia, Type II Gene|HEMPAS|RP11-379J5.1|Sec23 Homolog B (S. cerevisiae) wt Allele

    human sec23b wild-type allele is located in the vicinity of 20p11.23 and is approximately 54 kb in length. this allele, which encodes protein transport protein sec23b, is involved in the transport of vesicles from the endoplasmic reticulum to the golgi. mutation of the gene is associated with congenital dyserythropoietic anemia type ii.

  • Frontal Bossing

    a skeletal deformity characterized by an unusually prominent forehead. causes include acromegaly, hurler syndrome, silver-russell syndrome, and thalassemia major.

Patient EducationClinical

Craniofacial Abnormalities

Craniofacial is a medical term that relates to the bones of the skull and face. Craniofacial abnormalities are birth defects of the face or head. Some, like cleft lip and palate, are among the most common of all birth defects. Others are very rare. Most of them affect how a person's face or head looks.

Read the full article at MedlinePlus

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

Convert Q75.8 to ICD-9-CMHistory

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

ICD-9-CM
756.0 Anomal skull/face bones
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 Q75.8Overview

Is Q75.8 (Other congenital malformations of skull and face bones) a billable code?

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

What MS-DRG does Q75.8 group to?

When other specified congenital malformations of skull and face bones is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 565, 566, with relative weights from 0.7493 to 1.5436 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q75.8 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 specified congenital malformations of skull and face bones on inpatient claims.

What is the ICD-9 equivalent of Q75.8?

Under the General Equivalence Mappings, other specified congenital malformations of skull and face bones converts to ICD-9-CM 756.0 (anomal skull/face bones). 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.