ICD-10-CM 2027
ICD-10 code for pulpitis
From the official ICD-10-CM alphabetic index entry “Pulpitis (acute) (anachoretic) (chronic) (hyperplastic) (putrescent) (suppurative) (ulcerative)”. Page updated September 29, 2026.
About coding pulpitis
The ICD-10-CM code for pulpitis is K04.01 (Reversible pulpitis). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on K04.01.
Within K04.0 (pulpitis), K04.01 is specifically for reversible pulpitis. Related codes cover Irreversible pulpitis (K04.02).
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 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 pulpitis codes (official index)
Common questions about pulpitis ICD-10 codes
What is the ICD-10 code for pulpitis?
- K04.01 — Reversible pulpitis. More specific codes apply when the documentation supports them: K04.02, K04.01.
What is the ICD-10 code for irreversible pulpitis?
- K04.02 — Irreversible pulpitis.
What is the ICD-10 code for reversible pulpitis?
- K04.01 — Reversible pulpitis.
Is K04.01 billable?
- Yes. K04.01 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K04.01 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K04.01 as a principal diagnosis.
Is K04.01 a CC or MCC?
- K04.01 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.