535 Gastritis and duodenitis (535.00-535.71) ICD-9-CM
The 535.00-535.71 block classified 535 gastritis and duodenitis with 16 legacy diagnosis codes. None remain valid for claim submission; each code below links to its reference page with the official ICD-10-CM replacement under the CMS General Equivalence Mappings.
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.
Legacy Codes in the 535.00-535.71 Block 16 codes
None of these codes remain valid for claim submission. Each code page shows its ICD-10-CM replacement under the CMS General Equivalence Mappings.
- 535.00 Acute gastrtis w/o hmrhg
- 535.01 Acute gastritis w hmrhg
- 535.10 Atrph gastrtis w/o hmrhg
- 535.11 Atrph gastritis w hmrhg
- 535.20 Gstr mcsl hyprt w/o hmrg
- 535.21 Gstr mcsl hyprt w hmrg
- 535.30 Alchl gastrtis w/o hmrhg
- 535.31 Alchl gstritis w hmrhg
- 535.40 Oth spf gstrt w/o hmrhg
- 535.41 Oth spf gastrt w hmrhg
- 535.50 Gstr/ddnts NOS w/o hmrhg
- 535.51 Gstr/ddnts NOS w hmrhg
- 535.60 Duodenitis w/o hmrhg
- 535.61 Duodenitis w hmrhg
- 535.70 Eosinophil gastrt wo hem
- 535.71 Eosinophilc gastrt w hem
Questions About This Page
Are the 535.00-535.71 codes still billable?
No. Every code in this block became invalid for U.S. claims after September 30, 2015. Each code page linked above shows the ICD-10-CM replacement CMS assigned in the General Equivalence Mappings, and the ICD-9 / ICD-10 converter translates any of them directly.
What did the 535.00-535.71 block classify?
The block classified 535 gastritis and duodenitis with 16 codes in the final ICD-9-CM release. It sat under Diseases of the digestive system (520–579) in the legacy hierarchy.
Related References
Source: final CMS ICD-9-CM release (version date October 1, 2014). Retired from U.S. claims after September 30, 2015.
