742.1 MICROCEPHALUS

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Code Information

Diagnosis Code: 742.1

Short Description: Microcephalus

Long Description: Microcephalus

Code Classification:

Congenital anomalies (740–759)
- Congenital anomalies (740-759)
  - 742 Other congenital anomalies of nervous system
    - 742.1 Microcephalus

Code Version: 2015 ICD-9-CM

References to Index of Diseases and Injuries

The code 742.1 has the following ICD-9-CM references to the Index of Diseases and Injuries

Absence (organ or part) (complete or partial)
- skull bone 756.0
  - with
    - microcephalus 742.1

Agenesis - see also Absence, by site, congenital
- skull (bone) 756.0
  - with
    - microcephalus 742.1

Anomaly, anomalous (congenital) (unspecified type) 759.9
- bone NEC 756.9
  - skull 756.0
    - with
      - microcephalus 742.1
- skull (bone) 756.0
  - with
    - microcephalus 742.1
- specified type NEC
  - bone(s) 756.9
    - skull 756.0
      - with
        microcephalus 742.1
  - skull (bone(s)) 756.0
    - with
      - microcephalus 742.1

Deformity 738.9
- skull (acquired) 738.19
  - congenital 756.0
    - with
      - microcephalus 742.1

Distortion (congenital)
- skull bone(s) 756.0
  - with
    - microcephalus 742.1

Hydromicrocephaly 742.1

Hypoplasia, hypoplasis 759.89
- brain 742.1
  - gyri 742.2
  - specified part 742.2
- cephalic 742.1
- skull (bone) 756.0
  - with
    - microcephalus 742.1

Idiot, idiocy (congenital) 318.2
- microcephalic 742.1

Imperfect
- closure (congenital)
  - skull 756.0
    - with
      - microcephalus 742.1

Micrencephalon, micrencephaly 742.1

Microcephalus, microcephalic, microcephaly 742.1
- due to toxoplasmosis (congenital) 771.2

Microencephalon 742.1

Nondevelopment
- brain 742.1
  - specified part 742.2

Oligoencephalon 742.1

Undeveloped, undevelopment - see also Hypoplasia
- brain (congenital) 742.1
- cerebral (congenital) 742.1

Crosswalk Information

The code 742.1 converts into the following ICD-10 code(s):

ICD-9 Code		ICD-10 Code	ICD-10 Description
742.1		Q02	Microcephaly

This ICD-9 to ICD-10 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-9 Code	ICD-9 Description
742.0	Encephalocele
742.2	Congenital reduction deformities of brain
742.3	Congenital hydrocephalus
742.4	Other specified congenital anomalies of brain
742.51	Diastematomyelia
742.53	Hydromyelia
742.59	Other specified congenital anomalies of spinal cord
742.8	Other specified congenital anomalies of nervous system
742.9	Unspecified congenital anomaly of brain, spinal cord, and nervous system

This page was last updated on: 10/1/2014

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