Q89.2 — Congenital malformations of other endocrine glands

Billable

Is Q89.2 billable?

Yes — Q89.2 is billable for FY2027. Q89.2 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Q89.2 may be submitted for encounters from October 1, 2026 through September 30, 2027.

Q89.2 at a glance

Code	Q89.2
Description	Congenital malformations of other endocrine glands
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does Q89.2 group to?

Q89.2 sits in MDC 10 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

643Endocrine Disorders with MCCmedical
644Endocrine Disorders with CCmedical
645Endocrine Disorders without CC/MCCmedical

How is Q89.2 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to Q89.2. They show the wording a clinician may have documented, which often differs from the Tabular description.

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

Excludes1 — never code together

The conditions below can never be reported together with Q89.2 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

congenital goiter (E03.0)
congenital hypothyroidism (E03.1)

Inclusion terms

Alternative wording in documentation that is classified to Q89.2.

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

Excludes2 — not included here — inherited from Chapter 17

The conditions below are not part of Q89.2, but a patient may have both at the same time. When documentation supports it, Q89.2 and the excluded code may both be reported.

inborn errors of metabolism (E70-E88)

How long has Q89.2 existed?

Q89.2 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which codes are confused with Q89.2?

ICD-10-CM declares these codes mutually exclusive with Q89.2 — exactly one of each pair can be correct for a given encounter.