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ICD-10-CM 2027 diagnosis code

K06.021Generalized gingival recession, minimal

✓ Billable / specific

K06.021 is a valid, billable ICD-10-CM code for generalized gingival recession, minimal. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2018 (effective October 1, 2017). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About K06.021

K06.021 is the ICD-10-CM diagnosis code for generalized gingival recession, minimal. It belongs to category K06 (other disorders of gingiva and edentulous alveolar ridge), 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 K06.02 (gingival recession, generalized), K06.021 is specifically for generalized gingival recession, minimal. Related codes cover unspecified (K06.020), moderate (K06.022) and severe (K06.023).

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 was added in FY2018, effective October 1, 2017.

Before ICD-10, this condition was coded in ICD-9-CM as 523.21 (gingival recession, minimal) and 523.25 (gingival recession, generalized).

Notes that apply from higher levels

Instructions written at a parent level also apply to K06.021.

› From K06 Other disorders of gingiva and edentulous alveolar ridge
Excludes2
  • acute gingivitis (K05.0)
  • atrophy of edentulous alveolar ridge (K08.2)
  • chronic gingivitis (K05.1)
  • gingivitis NOS (K05.1)

Broader instructions also apply from Chapter 11: Diseases of the digestive system.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to K06.021.

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.

ICD-9-CM equivalent

Converter →
  • 523.21Gingival recession, minimalapproximate, combination
  • 523.25Gingival recession, generalizedapproximate, combination

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2018 (effective 10/1/2017): Added
  • No changes since FY2018.

Common questions about K06.021

Is K06.021 billable?

Yes. K06.021 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can K06.021 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict K06.021 as a principal diagnosis.

Is K06.021 a CC or MCC?

No. K06.021 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does K06.021 group to?

K06.021 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 K06.021?

The CMS General Equivalence Mappings map K06.021 to ICD-9-CM 523.21 and 523.25.