ICD-10-CM 2027 diagnosis code
K03.6Deposits [accretions] on teeth
K03.6 is a valid, billable ICD-10-CM code for deposits [accretions] on teeth. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Looking up by condition? See ICD-10 code for Tartar, ICD-10 code for Accretions.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About K03.6
K03.6 is the ICD-10-CM diagnosis code for deposits [accretions] on teeth. It belongs to category K03 (other diseases of hard tissues of teeth), block K00-K14 (diseases of oral cavity and salivary glands) and chapter 11 (diseases of the digestive system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within K03 (other diseases of hard tissues of teeth), K03.6 is specifically for deposits [accretions] on teeth. Related codes cover excessive attrition of teeth (K03.0), abrasion of teeth (K03.1), erosion of teeth (K03.2), pathological resorption of teeth (K03.3), Hypercementosis (K03.4), ankylosis of teeth (K03.5), posteruptive color changes of dental hard tissues (K03.7), other specified diseases of hard tissues of teeth (K03.8) 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.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 523.6 (accretions on teeth).
Coding notes
- Betel deposits [accretions] on teeth
- Black deposits [accretions] on teeth
- Extrinsic staining of teeth NOS
- Green deposits [accretions] on teeth
- Materia alba deposits [accretions] on teeth
- Orange deposits [accretions] on teeth
- Staining of teeth NOS
- Subgingival dental calculus
- Supragingival dental calculus
- Tobacco deposits [accretions] on teeth
Notes that apply from higher levels
Instructions written at a parent level also apply to K03.6.
Broader instructions also apply from Chapter 11: Diseases of the digestive system.
Alphabetic index entries
10 entriesTerms in the official ICD-10-CM index that lead to K03.6.
- Accretions, tooth, teeth
- Calculus, calculi, calculous › dental (subgingival) (supragingival)
- Calculus, calculi, calculous › tooth, teeth (subgingival) (supragingival)
- Deposit › tooth, teeth (betel) (black) (green) (materia alba) (orange) (tobacco)
- Stain, staining › tooth, teeth (hard tissues) (extrinsic)
- Stain, staining › tooth, teeth (hard tissues) (extrinsic) › due to › accretions
- Stain, staining › tooth, teeth (hard tissues) (extrinsic) › due to › deposits (betel) (black) (green) (materia alba) (orange) (soft) (tobacco)
- Stain, staining › tooth, teeth (hard tissues) (extrinsic) › due to › nicotine
- Stain, staining › tooth, teeth (hard tissues) (extrinsic) › due to › tobacco
- Tartar (teeth) (dental calculus)
Codes whose notes reference K03.6
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC PRE · Pre-MDC
MDC 03 · Diseases and Disorders of the Ear, Nose, Mouth and Throat
ICD-9-CM equivalent
Converter →- 523.6Accretions on teethexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about K03.6
Is K03.6 billable?
- Yes. K03.6 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K03.6 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K03.6 as a principal diagnosis.
Is K03.6 a CC or MCC?
- No. K03.6 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does K03.6 group to?
- K03.6 is used in the MS-DRG v44.0 logic for MS-DRG 011 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC), MS-DRG 012 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC), MS-DRG 013 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC), MS-DRG 157 (Dental and Oral Diseases with MCC), MS-DRG 158 (Dental and Oral Diseases with CC) and MS-DRG 159 (Dental and Oral Diseases without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for K03.6?
- The CMS General Equivalence Mappings map K03.6 to ICD-9-CM 523.6.