Table 2. Attribution of Patients With Newly Diagnosed Cancer to Medical Oncology, Surgery, and Radiation Oncology Practices.
| Practice assignment | Type of cancer, No. (%) or No./total No. (%)a | |||
|---|---|---|---|---|
| Breast (n = 78 736) | Colorectal (n = 51 385) | Lung (n = 95 635) | Prostate (n = 75 571) | |
| Proportion of patients attributed to practices based on visits in the 6 mo after diagnosis | ||||
| Assigned to any practice type | ||||
| Based on outpatient visits | 72 291 (91.8) | 40 054 (77.9) | 70 854 (74.1) | 67 390 (89.2) |
| Based on outpatient and inpatient visits | 73 258 (93.0) | 46 439 (90.4) | 83 797 (87.6) | 68 201 (90.2) |
| Based on outpatient visits, stratified by cancer stage | ||||
| Stage I | 33 036/33 942 (97.3) | 9384/12 225 (76.8) | 19 129/23 132 (82.7) | 399/681 (58.6) |
| Stage II | 19 684/20 440 (96.3) | 11 734/14 316 (82.0) | 3478/3996 (87.0) | 51 946/57 896 (89.7) |
| Stage III | 5448/5698 (95.6) | 11 011/12 810 (86.0) | 17 128/22 326 (76.7) | 4840/5122 (94.5) |
| Stage IV | 3304/4138 (79.8) | 7212/10 482 (68.8) | 29 033/42 541 (68.2) | 6975/8288 (84.2) |
| Assigned to any medical oncology practiceb | ||||
| Based on outpatient visits | 56 884 (72.2) | 27 857 (54.2) | 53 635 (56.1) | 8010 (10.6) |
| Based on outpatient and inpatient visits | 57 631 (73.2) | 31 647 (61.6) | 62 458 (65.3) | 8548 (11.3) |
| Based on outpatient visits by cancer stage | ||||
| Stage I | 27 453/33 942 (80.9) | 4163/12 225 (34.1) | 10 468/23 132 (45.3) | 8/681 (1.2) |
| Stage II | 16 888/20 440 (82.6) | 7969/14 316 (55.7) | 2870/3996 (71.8) | 3658/57 896 (6.3) |
| Stage III | 4817/5698 (84.5) | 9238/12 810 (72.1) | 14 361/22 326 (64.3) | 491/5122 (9.6) |
| Stage IV | 2939/4138 (71.0) | 6114/10 482 (58.3) | 24 651/42 541 (57.9) | 3640/8288 (43.9) |
| Assigned to any surgical practice | ||||
| Based on surgery claim | 65 849 (83.6) | 36 733 (71.5) | 16 939 (17.7) | 13 974 (18.5) |
| Based on surgery claim or visit to a surgeon | 73 599 (93.5) | 42 993 (83.7) | 35 527 (37.1) | 67 722 (89.6) |
| Stratified by cancer stage | ||||
| Stage I | 23 928/33 942 (97.0) | 10 375/12 225 (84.9) | 15 296/23 132 (66.1) | 552/681 (81.1) |
| Stage II | 19 482/20 440 (95.3) | 13 497/14 316 (94.3) | 2550/3996 (63.8) | 52 803/57 896 (91.2) |
| Stage III | 5301/5698 (93.0) | 12 051/12 810 (94.1) | 7818/22 326 (35.0) | 4846/5122 (94.6) |
| Stage IV | 2208/4138 (53.4) | 6166/10 482 (58.8) | 8506/42 541 (20.0) | 6200/8288 (74.8) |
| Assigned to any radiation oncology practice | ||||
| Based on radiation claim | 9432 (12.0) | 1647 (3.2) | 8404 (8.8) | 11 503 (15.2) |
| Based on radiation claim or visit to a radiation oncologist | 42 221 (53.6) | 6083 (11.8) | 34 086 (35.6) | 34 208 (45.3) |
| Stratified by cancer stage | ||||
| Stage I | 21 647/33 942 (63.8) | 1108/12 225 (9.1) | 7998/23 132 (34.6) | 32/681 (4.7) |
| Stage II | 9769/20 440 (47.8) | 1823/14 316 (12.7) | 1680/3996 (42.0) | 28 480/57 896 (49.2) |
| Stage III | 2250/5698 (39.5) | 2053/12 810 (16.0) | 9771/22 326 (43.8) | 2002/5122 (39.1) |
| Stage IV | 1011/4138 (24.4) | 936/10 482 (8.9) | 13 799/42 541 (32.4) | 2240/8288 (27.0) |
| Proportion of patients with cancer-related visits to >1 practice in the 6 mo after diagnosis | ||||
| Outpatients with visits to >1 practice of any type | 56 223/78 736 (71.4) | 26 084/51 385 (50.8) | 47 774/95 635 (50.0) | 42 812/75 571 (56.7) |
| Outpatients with any visits to medical oncology practiceb | ||||
| Outpatients with visits to >1 medical oncology practice | 4489/56 684 (7.9) | 2285/27 857 (8.2) | 5492/53 635 (10.2) | 599/8010 (7.5) |
| Outpatients with only 1 visit to medical oncology practice | 12 443/56 684 (21.9) | 6467/27 857 (23.2) | 11 181/53 635 (20.8) | 3218/8010 (40.2) |
| Outpatients with surgery visits or surgery | ||||
| Outpatients with surgical visits or surgical procedures from >1 surgery practice | 15 184/73 599 (20.6) | 9540/42 993 (22.2) | 5522/35 527 (15.5) | 15 338/67 722 (22.6) |
| Outpatients with ≥1 radiation oncology visit or radiation | ||||
| Outpatients with visits to or radiation therapy from > l radiation oncology practice | 2313/42 221 (5.5) | 268/6083 (4.4) | 1925/34 086 (5.6) | 3593/34 208 (10.5) |
a
Percentages may not total 100 because of rounding.
b
A visit to a medical oncology practice was defined as a claim with a specialty code of medical oncology, hematology/oncology, hematology, or gynecologic oncology.