Home
ICD-9-CM
Procedure Codes
20.41

20.41

Simple mastoidectomy

The ICD-9 procedure code for simple mastoidectomy is 20.41.

Legacy code — retired October 1, 2015

Source: final official CMS ICD-9-CM release (Version 32, FY2014), Volume 3 procedure codes. ICD-9-CM was retired for U.S. billing on October 1, 2015. Informational only.

Data current as of FY2026 CMS/NCHS release. Not affiliated with or endorsed by CMS, HHS, or NCHS.

ICD-10-CM

Diagnosis Codes Diagnosis Index External Causes Index Table of Drugs Table of Neoplasms Coding Guidelines

Other Code Sets

ICD-10-PCS Procedure Codes HCPCS Level II Codes ICD-9-CM Diagnosis Codes ICD-9-CM Procedure Codes

Tools

ICD-9 ↔ ICD-10 Crosswalk MS-DRG Lookup Annual Code Changes

Site

About Methodology & Sources Disclaimer Terms of Service Privacy

Independently operated. Not affiliated with, endorsed by, sponsored by, or approved by CMS, HHS, NCHS, AHA, or any other government agency or third party. Sourced from official public-domain data — see Methodology for details.