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ICD-10-CM 2027 diagnosis code

D10.4Benign neoplasm of tonsil

✓ Billable / specific

D10.4 is a valid, billable ICD-10-CM code for benign neoplasm of tonsil. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 D10.4

D10.4 is the ICD-10-CM diagnosis code for benign neoplasm of tonsil. It belongs to category D10 (benign neoplasm of mouth and pharynx), block D10-D36 (benign neoplasms, except benign neuroendocrine tumors) and chapter 2 (neoplasms). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within D10 (benign neoplasm of mouth and pharynx), D10.4 is specifically for benign neoplasm of tonsil. Related codes cover lip (D10.0), tongue (D10.1), floor of mouth (D10.2), other and unspecified parts of mouth (D10.3), other parts of oropharynx (D10.5), nasopharynx (D10.6), hypopharynx (D10.7) and pharynx, unspecified (D10.9).

Don't report D10.4 together with the conditions in its Excludes1 note: benign neoplasm of lingual tonsil (D10.1), benign neoplasm of pharyngeal tonsil (D10.6), benign neoplasm of tonsillar fossa (D10.5) and benign neoplasm of tonsillar pillars (D10.5).

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 154 (Other Ear, Nose, Mouth and Throat Diagnoses with MCC, relative weight 1.5921), DRG 155 (Other Ear, Nose, Mouth and Throat Diagnoses with CC, relative weight 0.9322) and DRG 156 (Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC, relative weight 0.6659), 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 210.5 (benign neoplasm of tonsil).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Benign neoplasm of tonsil (faucial) (palatine)
Excludes1Not coded here — never report together with this code
  • benign neoplasm of lingual tonsil (D10.1)
  • benign neoplasm of pharyngeal tonsil (D10.6)
  • benign neoplasm of tonsillar fossa (D10.5)
  • benign neoplasm of tonsillar pillars (D10.5)

Notes that apply from higher levels

Instructions written at a parent level also apply to D10.4.

Broader instructions also apply from Chapter 2: Neoplasms.

Table of Drugs & Neoplasms entries

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 →
  • 210.5Benign neoplasm of tonsilexact

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
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about D10.4

Is D10.4 billable?

Yes. D10.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can D10.4 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict D10.4 as a principal diagnosis.

Is D10.4 a CC or MCC?

No. D10.4 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does D10.4 group to?

D10.4 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 154 (Other Ear, Nose, Mouth and Throat Diagnoses with MCC), MS-DRG 155 (Other Ear, Nose, Mouth and Throat Diagnoses with CC) and MS-DRG 156 (Other Ear, Nose, Mouth and Throat Diagnoses 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 D10.4?

The CMS General Equivalence Mappings map D10.4 to ICD-9-CM 210.5.