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. Author manuscript; available in PMC: 2021 Dec 1.
Published in final edited form as: Med Care. 2020 Dec;58(12):1044–1050. doi: 10.1097/MLR.0000000000001420

TABLE 1.

ICD-9-CM and ICD-10-CM Diagnosis Code Lists for the Functional Comorbidity Index (FCI)

FCI comorbidity ICD-9-CM ICD-10-CM
Arthritis (rheumatoid and osteoarthritis) 714.×, 715.× M05.×, M06.×, M08.0×, M08.2×, M08.3, M08.4×, M08.8×, M08.9×, M12.0×, M15.×, M16.×, M17.×, M18.×, M19.×
Osteoporosis 733.0× M80.×, M81.×
Asthma 493.× J45.×
Chronic respiratory disease (chronic obstructive pulmonary disease, chronic respiratory distress, or emphysema) 491.2×, 492.×, 494.×, 495.×, 496, 500, 501, 502, 503, 504, 505, 506.4, 508.1, 518.83, 518.84 J43.×, J44.×, J47.×, J60, J61, J62.×, J63.×, J64, J65, J66.×, J67.×, J68.4, J70.1, J96.1×, J96.2×
Angina 413.× I20.1, I20.8, I20.9
Congestive heart failure or heart disease 398.91, 411.×, 414.×, 428.× I09.81, I24.×, I25.1×, I25.3, I25.4×, I25.5, I25.6, I25.7×, I25.8×, I25.9, I50.×
Myocardial infarction (heart attack) 410.×, 412 I21.×, I22.×, I25.2
Neurological disease 330.9, 331.0, 331.1×, 331.2, 331.6, 331.82, 331.83, 331.89, 331.9, 332.×, 333.4, 333.5, 333.71, 333.92, 334.×, 335.×, 340, 341.×, 342.×, 343.×, 344.0×, 344.1, 344.2, 344.3×, 344.4×, 344.5, 344.8×, 344.9, 345.×, 348.1 G04.1, G10, G11.×, G12.×, G20, G21.×, G25.4, G25.5, G30.×, G31.0×, G31.1, G31.83, G31.84, G31.85, G31.89, G31.9, G32.81, G35, G36.×, G37.×, G40.×, G80.×, G81.×, G82.×, G83.0, G83.1×, G83.2×, G83.3×, G83.5, G83.8×, G83.9, G93.1
Stroke or transient ischemic attack 430, 431, 433.01, 433.11, 433.21, 433.31, 433.81, 433.91, 434.01, 434.11, 434.91, 435.×, 438.× G45.0, G45.1, G45.2, G45.8, G45.9, G46.0, G46.1, G46.2, I60.×, I61.×, I63.×, I67.84×, I69.×
Peripheral vascular disease 440.2×, 440.3×, 440.4, 443.9× I70.2×, I70.3×, I70.4×, I70.5×, I70.6×, I70.7×, I70.92, I73.9
Diabetes (type I or II) 249.×, 250.× E08.×, E09.×, E10.×, E11.×, E13.×
Upper gastrointestinal disease 530.1×, 530.2×, 530.81, 530.85, 531.×, 532.×, 533.×, 534.×, 535.× K20.×, K21.×, K22.1×, K22.7×, K25.×, K26.×, K27.×, K28.×, K29.×
Depression 296.2×, 296.3×, 296.4×, 296.5×, 296.6×, 296.7×, 296.8×, 296.9×, 298.0, 300.4, 301.10, 301.12, 301.13, 311 F31.×, F32.×, F33.×, F34.×, F39
An×iety or panic disorder 300.0×, 300.2×, 300.3, 309.81 F40.×, F41.×, F42.×, F43.1×
Visual impairment 369.× H54.×
Hearing impairment 388.01, 388.1×, 388.2, 389.× H83.3×, H90.×, H91.×
Back disease (degenerative disc disease, spinal stenosis, or severe chronic back pain) 720.0, 721.2, 721.3, 721.4×, 721.9×, 722.1×, 722.2, 722.3×, 722.5×, 722.6, 722.70, 722.72, 722.73, 722.80, 722.82, 722.83, 722.90, 722.92, 722.93, 724.0×, 724.3, 724.4 M08.1, M45.0, M45.4, M45.5, M45.6, M45.7, M45.8, M45.9, M46.4×, M47.10, M47.14, M47.15, M47.16, M47.20, M47.24, M47.25, M47.26, M47.27, M47.28, M47.814, M47.815, M47.816, M47.817, M47.818, M47.819, M47.894, M47.895, M47.896, M47.897, M47.898, M47.899, M47.9, M48.00, M48.04, M48.05, M48.06, M48.07, M48.08, M51.×, M54.14, M54.15, M54.16, M54.17, M54.3×, M54.4×, M96.1
Obesity (body mass index ≥ 30) 278.00, 278.01, 278.03, V85.3×, V85.4× E66.0×, E66.1, E66.2, E66.8, E66.9, Z68.3×, Z68.4×

FCI indicates Functional Comorbidity Index; ICD, International Classification of Diseases.