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ICD-10-CM 2027

ICD-10 code for Valleculae anomaly

Q31.8

Other congenital malformations of larynx

✓ Billable / specificCC — complication/comorbidity

From the official ICD-10-CM alphabetic index entry “Anomaly, anomalous (congenital) (unspecified type) › valleculae”. Page updated September 29, 2026.

About coding Valleculae anomaly

The ICD-10-CM code for Valleculae anomaly is Q31.8 (Other congenital malformations of larynx).

Within Q31, choose Q31.8 (Other congenital malformations of larynx) only when documentation doesn't support a more specific option: web of larynx (Q31.0), congenital subglottic stenosis (Q31.1), laryngeal hypoplasia (Q31.2), Laryngocele (Q31.3), congenital laryngomalacia (Q31.5) and congenital malformation of larynx, unspecified (Q31.9).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 011 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC, relative weight 5.6154), DRG 012 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC, relative weight 4.381), DRG 013 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC, relative weight 2.7307), DRG 154 (Other Ear, Nose, Mouth and Throat Diagnoses with MCC, relative weight 1.5921), DRG 155 (Other Ear, Nose, Mouth and Throat Diagnoses with CC, relative weight 0.9322) and DRG 156 (Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC, relative weight 0.6659), in Pre-MDC and MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

Common questions about Valleculae anomaly ICD-10 codes

What is the ICD-10 code for Valleculae anomaly?

Q31.8 — Other congenital malformations of larynx.

Is Q31.8 billable?

Yes. Q31.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Q31.8 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Q31.8 as a principal diagnosis.

Is Q31.8 a CC or MCC?

Q31.8 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.