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Tools for CPT and HCPCS Level II
CCS for Services and Procedures
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Tools for ICD-9-CM
Clinical Classifications Software (CCS) for ICD-9-CM
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Elixhauser Comorbidity Software for ICD-9-CM
Utilization Flags for Revenue Center Codes and ICD-9-CM
Procedure Classes for ICD-9-CM
Surgery Flags for ICD-9-CM
HCUP Supplemental Files
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NASS Database Documentation Archive
Description of NASS Files
Introduction to the NASS
2021 (
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2020 (
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file, 775 KB;
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2019 (
PDF
file, 816 KB;
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2018 (
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2017 (
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2016 (
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