Short answer · Medically reviewed summary · Last updated: 2026-05-08
Monosomy 9p does not have a unique, specific ICD-10 or ICD-9 code; instead, it is classified under broader categories for chromosomal abnormalities. In ICD-10, it is typically coded as Q93.5 (Other deletions of part of a chromosome), while in ICD-9, it was categorized under 758.3 (Autosomal deletion syndromes). What is the clinical classification of Monosomy 9p? Monosomy 9p, also known as 9p deletion syndrome, is a rare chromosomal disorder caused by the loss of genetic material from the short arm of chromosome 9.
ICD10 code of Monosomy 9p and ICD9 code
ICD-10 and ICD-9 codes for Monosomy 9p, with classification details for clinicians, coders and patients.
Monosomy 9p does not have a unique, specific ICD-10 or ICD-9 code; instead, it is classified under broader categories for chromosomal abnormalities. In ICD-10, it is typically coded as Q93.5 (Other deletions of part of a chromosome), while in ICD-9, it was categorized under 758.3 (Autosomal deletion syndromes).
What is the clinical classification of Monosomy 9p?
Monosomy 9p, also known as 9p deletion syndrome, is a rare chromosomal disorder caused by the loss of genetic material from the short arm of chromosome 9. Because Monosomy 9p manifests with highly variable clinical presentations depending on the exact size and location of the deletion, medical coding systems like ICD-10 and ICD-9 utilize "umbrella" codes rather than a disease-specific identifier. These codes are primarily used for administrative and billing purposes rather than clinical diagnosis.
What are the common features associated with Monosomy 9p?
The clinical presentation of Monosomy 9p is diverse, but patients often share common developmental and physical characteristics. At DiseaseMaps.org, our community of individuals living with Monosomy 9p highlights the importance of multidisciplinary care to manage these symptoms effectively:
- Distinctive craniofacial features, such as trigonocephaly (a triangular-shaped forehead).
- Developmental delays and intellectual disabilities of varying degrees.
- Hypotonia (low muscle tone) and motor delay during early childhood.
- Cardiac anomalies, which occur in a subset of patients with Monosomy 9p.
- Behavioral challenges, which are frequently reported by caregivers in our patient community.
How is Monosomy 9p diagnosed?
Diagnosis of Monosomy 9p is confirmed through genetic testing, such as a chromosomal microarray (CMA) or karyotype analysis. These tests identify the specific deletion on chromosome 9, providing far more clinical utility than the administrative ICD codes. Early genetic counseling is recommended for families to understand the inheritance patterns and recurrence risks.
Next steps
- Consult with a clinical geneticist to review specific deletion breakpoints in your genetic report.
- Connect with the 3 members of the DiseaseMaps.org community who are navigating life with Monosomy 9p.
- Schedule routine screenings with a pediatric cardiologist and developmental pediatrician.
Medical disclaimer: This information is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment.
References
- Orphanet: 9p deletion syndrome (ORPHA:96148).
- NIH GARD: 9p deletion syndrome.
- OMIM: Chromosome 9p deletion syndrome (Entry #158120).
