Q89.2 Congenital malformations of other endocrine glands

The ICD-10-CM code for Congenital malformations of other endocrine glands is Q89.2 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

17: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

Section

Q80-Q89: Other congenital malformations (Q80-Q89)

Category Q89

13 codes (10 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to Q89.2:

• Thyrolingual duct, persistent
• Retrosternal thyroid (congenital)
• Aberrant (congenital) › pituitary gland
• Aberrant (congenital) › thyroid gland
• Aberrant (congenital) › endocrine gland NEC
• Absence (of) (organ or part) (complete or partial) › endocrine gland (congenital) NEC
• Aberrant (congenital) › thymus (gland)
• Aberrant (congenital) › parathyroid gland

Inclusion Terms

• Congenital malformation of parathyroid or thyroid gland
• Persistent thyroglossal duct
• Thyroglossal cyst

U.S. Hospital Utilization

• An estimated 2,070 U.S. inpatient stays in 2023 included Q89.2 among the documented diagnoses.
• 365 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

POA indicator for congenital conditions/anomalies and Q00-Q99 exception

Congenital conditions and anomalies Assign “Y” for congenital conditions and anomalies except for categories Q00- Q99, Congenital anomalies, which are on the exempt list. Congenital conditions are always considered present on admission.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)