Table 2. Coded staging criteria for diabetes mellitus using International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM).

Stage	Common description or name of the condition	ICD-9-CM codes that define each stage and substage
1.0	Diabetes mellitus	775.10, 790.20, 250.00-250.01, 250.80-250.91;
2.1	Diabetes mellitus with an infection in one or more systems (skin, genital tract, urinary tract infection, etc.)	S1.0 + 320.00-324.90,245.00-245.10, 254.10, 289.20-289.30, 420.00-422.99, 424.91, 429.89, 447.60, 480.00-486.00, 510.00-510.90, 511.10, 513.00-513.10, 526.40, 566.00-567.90, 569.50, 572.00, 577.00, 580.81, 590.00-590.30, 595.00-595.40, 595.89-595.90, 597.00-597.80, 598.00-598.01, 599.00, 601.00-601.90, 603.10, 604.00-604.99, 607.10-607.20, 590.90, 608.00, 608.40-608.81, 611.00, 614.00-616.11, 616.30-617.90, 680.00-686.90, 711.00-711.99, 728.00, 730.00-730.39, 730.80-730.99;
2.2	Diabetes mellitus with septicemia	S1.0 + 038.00-038.90;
2.3	Diabetes mellitus with acidosis	S1.0 + 588.80, 791.60, 276.20-276.40; 250.10-250.11;
2.4	Diabetes mellitus with: retinopathy but without loss of vision or glomerulosclerosis (without azotemia) or neuropathy (peripheral or autonomic) or gangrene (tissue breakdown)	S1.0-S2.3 + 337.10, 362.18, 443.81, 443.90, 446.60, 447.10, 581.81, 785.40, 354.00-356.90; 357.20, 362.01, 250.40-250.71;
3.1	Diabetes mellitus with: acidosis and coma or retinopathy and loss of vision or necrotizing papillitis or azotemia	S2.4 + 276.20, 369.00-369.90; S1.0-S2.4 + 583.70, 780.00, 790.60, 584.50-586.00, 590.80-590.81; 362.02, 250.30-250.31;
3.2	Diabetes mellitus with hyperosmolar coma	250.20-250.21;
3.3	Shock	S1.0-S3.2 + ZSHOCK9;
4.0	Death	S2.2-S3.3 + Death: