ICD-10-CM 2027
ICD-10 code for palate cleft
From the official ICD-10-CM alphabetic index entry “Cleft (congenital) › palate”. Page updated September 29, 2026.
About coding palate cleft
The ICD-10-CM code for palate cleft is Q35.9 (Cleft palate, unspecified). The official index lists 15 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Q35.9.
Within Q35, choose Q35.9 (unspecified) only when documentation doesn't support a more specific option: hard palate (Q35.1), soft palate (Q35.3), hard palate with cleft soft palate (Q35.5) and uvula (Q35.7).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
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 157 (Dental and Oral Diseases with MCC, relative weight 1.809), DRG 158 (Dental and Oral Diseases with CC, relative weight 0.9366) and DRG 159 (Dental and Oral Diseases without CC/MCC, relative weight 0.6893), 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.
More specific palate cleft codes (official index)
- with cleft lip (unilateral) Q37.9 — Unspecified cleft palate with unilateral cleft lip
- bilateral Q37.8 — Unspecified cleft palate with bilateral cleft lip
- hard Q35.1 — Cleft hard palate
- with
- cleft lip (unilateral) Q37.1 — Cleft hard palate with unilateral cleft lip
- bilateral Q37.0 — Cleft hard palate with bilateral cleft lip
- soft Q35.5 — Cleft hard palate with cleft soft palate
- with cleft lip (unilateral) Q37.5 — Cleft hard and soft palate with unilateral cleft lip
- bilateral Q37.4 — Cleft hard and soft palate with bilateral cleft lip
- medial Q35.5 — Cleft hard palate with cleft soft palate
- soft Q35.3 — Cleft soft palate
- with
- cleft lip (unilateral) Q37.3 — Cleft soft palate with unilateral cleft lip
- bilateral Q37.2 — Cleft soft palate with bilateral cleft lip
- hard Q35.5 — Cleft hard palate with cleft soft palate
- with cleft lip (unilateral) Q37.5 — Cleft hard and soft palate with unilateral cleft lip
- bilateral Q37.4 — Cleft hard and soft palate with bilateral cleft lip
Common questions about palate cleft ICD-10 codes
What is the ICD-10 code for palate cleft?
- Q35.9 — Cleft palate, unspecified. More specific codes apply when the documentation supports them: Q37.9, Q37.8, Q35.1, Q37.1 and others below.
What is the ICD-10 code for hard palate cleft?
- Q35.1 — Cleft hard palate.
What is the ICD-10 code for medial palate cleft?
- Q35.5 — Cleft hard palate with cleft soft palate.
What is the ICD-10 code for soft palate cleft?
- Q35.3 — Cleft soft palate.
Is Q35.9 billable?
- Yes. Q35.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q35.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q35.9 as a principal diagnosis.
Is Q35.9 a CC or MCC?
- No. Q35.9 is neither a CC nor an MCC under MS-DRG v44.0.