ICD-10-CM 2027
ICD-10 code for Putrescent pulp
From the official ICD-10-CM alphabetic index entry “Putrescent pulp (dental)”. Page updated September 29, 2026.
About coding Putrescent pulp
The ICD-10-CM code for Putrescent pulp is K04.1 (Necrosis of pulp).
Within K04 (diseases of pulp and periapical tissues), K04.1 is specifically for necrosis of pulp. Related codes cover pulpitis (K04.0), pulp degeneration (K04.2), abnormal hard tissue formation in pulp (K04.3), acute apical periodontitis of pulpal origin (K04.4), chronic apical periodontitis (K04.5), periapical abscess with sinus (K04.6), periapical abscess without sinus (K04.7), Radicular cyst (K04.8) and 1 more.
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.
Common questions about Putrescent pulp ICD-10 codes
What is the ICD-10 code for Putrescent pulp?
- K04.1 — Necrosis of pulp.
Is K04.1 billable?
- Yes. K04.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K04.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K04.1 as a principal diagnosis.
Is K04.1 a CC or MCC?
- No. K04.1 is neither a CC nor an MCC under MS-DRG v44.0.