2020 ICD-10-CM Diagnosis Code Q78.4

Enchondromatosis

    2016 2017 2018 2019 2020 Billable/Specific Code POA Exempt
  • Q78.4 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM Q78.4 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of Q78.4 - other international versions of ICD-10 Q78.4 may differ.
Applicable To
  • Maffucci's syndrome
  • Ollier's disease
The following code(s) above Q78.4 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to Q78.4:
  • Q00-Q99
    2020 ICD-10-CM Range Q00-Q99

    Congenital malformations, deformations and chromosomal abnormalities

    Note
    • Codes from this chapter are not for use on maternal records
    Type 2 Excludes
    • inborn errors of metabolism (E70-E88)
    Congenital malformations, deformations and chromosomal abnormalities
  • Q78
    ICD-10-CM Diagnosis Code Q78

    Other osteochondrodysplasias

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • congenital myotonic chondrodystrophy (G71.13)
    Other osteochondrodysplasias
Approximate Synonyms
  • Maffucci syndrome
  • Multiple enchondromatosis
Clinical Information
  • A rare benign disorder characterized by lack of normal endchondral ossification, and the growth of multiple enchondromas. It primarily affects the bones of the hand, in children and young adults. Extent of the disease varies; in some cases, neoplastic involvement may be wide spread causing considerable deformity.
  • A rare benign disorder characterized by lack of normal endochondral ossification, and the growth of multiple enchondromas. It primarily affects the bones of the hand, in children and young adults. Extent of the disease varies; in some cases, neoplastic involvement may be wide spread causing considerable deformity.
  • Benign growths of cartilage in the metaphyses of several bones.
Present On Admission
POA Help
"Present On Admission" is defined as present at the time the order for inpatient admission occurs — conditions that develop during an outpatient encounter, including emergency department, observation, or outpatient surgery, are considered POA.
  • Q78.4 is considered exempt from POA reporting.
ICD-10-CM Q78.4 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 564 Other musculoskeletal system and connective tissue diagnoses with mcc
  • 565 Other musculoskeletal system and connective tissue diagnoses with cc
  • 566 Other musculoskeletal system and connective tissue diagnoses without cc/mcc

Convert Q78.4 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change

Diagnosis Index entries containing back-references to Q78.4:
  • Chondrodysplasia Q78.9
    ICD-10-CM Diagnosis Code Q78.9

    Osteochondrodysplasia, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code POA Exempt
    Applicable To
    • Chondrodystrophy NOS
    • Osteodystrophy NOS
    • with hemangioma Q78.4
  • Chondromatosis - see also Neoplasm, cartilage, uncertain behavior
    • internal Q78.4
  • Dyschondroplasia Q78.4 (with hemangiomata)
  • Enchondromatosis Q78.4 (cartilaginous) (multiple)
  • Maffucci's syndrome Q78.4
  • Ollier's disease Q78.4
  • Osteochondromatosis D48.0
    ICD-10-CM Diagnosis Code D48.0

    Neoplasm of uncertain behavior of bone and articular cartilage

      2016 2017 2018 2019 2020 Billable/Specific Code
    Type 1 Excludes
    • neoplasm of uncertain behavior of cartilage of ear (D48.1)
    • neoplasm of uncertain behavior of cartilage of larynx (D38.0)
    • neoplasm of uncertain behavior of cartilage of nose (D38.5)
    • neoplasm of uncertain behavior of connective tissue of eyelid (D48.1)
    • neoplasm of uncertain behavior of synovia (D48.1)
    • syndrome Q78.4

ICD-10-CM Codes Adjacent To Q78.4
Q77.5 Diastrophic dysplasia
Q77.6 Chondroectodermal dysplasia
Q77.7 Spondyloepiphyseal dysplasia
Q77.8 Other osteochondrodysplasia with defects of growth of tubular bones and spine
Q77.9 Osteochondrodysplasia with defects of growth of tubular bones and spine, unspecified
Q78 Other osteochondrodysplasias
Q78.0 Osteogenesis imperfecta
Q78.1 Polyostotic fibrous dysplasia
Q78.2 Osteopetrosis
Q78.3 Progressive diaphyseal dysplasia
Q78.4 Enchondromatosis
Q78.5 Metaphyseal dysplasia
Q78.6 Multiple congenital exostoses
Q78.8 Other specified osteochondrodysplasias
Q78.9 Osteochondrodysplasia, unspecified
Q79 Congenital malformations of musculoskeletal system, not elsewhere classified
Q79.0 Congenital diaphragmatic hernia
Q79.1 Other congenital malformations of diaphragm
Q79.2 Exomphalos
Q79.3 Gastroschisis
Q79.4 Prune belly syndrome

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.