Diseases of the digestive system (520-579) ICD-9-CM
The 520-579 chapter covered diseases of the digestive system with 596 legacy diagnosis codes across 7 sections. No ICD-9-CM code has been valid for claim submission since October 1, 2015; each section below leads to the codes and their ICD-10-CM replacements.
Retired Code Set
ICD-9-CM stopped being valid for U.S. claims with dates of service on or after October 1, 2015, when ICD-10-CM replaced it. Use this index for historical lookups and crosswalking; for current coding, start from the ICD-10-CM codes list or the ICD-9 / ICD-10 converter.
Sections in This Chapter 7 sections · 596 codes
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Questions About This Page
How many codes are in the 520-579 chapter?
The 520-579 chapter contains 596 legacy diagnosis codes across 7 sections in the final ICD-9-CM release.
Can I still use these codes on claims?
No. ICD-9-CM was retired on October 1, 2015. To code diseases of the digestive system today, use the current ICD-10-CM codes: every legacy code page in this range links its official replacement, and the ICD-9 / ICD-10 converter translates codes in both directions.
Related References
Source: final CMS ICD-9-CM release (version date October 1, 2014). Retired from U.S. claims after September 30, 2015.
