Number of Cancer Cases Enrolled in Part D

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Number of Patients with Part D Enrollment

The following tables list the number of persons appearing in the SEER-Medicare data who are enrolled in Medicare Part D as well as the total number of patients who were eligible to enroll according to the MBSF file. The tables were generated separately for patients not enrolled in Managed Care and for those enrolled in Managed Care only. The results were produced for three calendar years: year of diagnosis, year before diagnosis, and year after diagnosis; for all patients and by cancer site for patients with a first primary cancer. The results are further broken out by a patient's year of diagnosis, allowing for the identification of patients diagnosed during a specific year who were also enrolled in Medicare Part D during the three calendar year time periods.

Number of SEER-Medicare Cancer Patients with Part D Enrollment by Diagnosis Year 2007-20211
Diagnosis Year Cancer Site Cancer patients2 Enrolled in Part D during the calendar year of diagnosis Cancer patients3 Enrolled in Part D during the calendar year prior to diagnosis Cancer patients4 Enrolled in Part D during the calendar year after diagnosis
N N % N N % N N %
2007 All first primary cancers5 206,388 100,500 48.7 196,447 N/A N/A 162,104 83,112 51.3
Breast 25,543 13,422 52.5 24,118 N/A N/A 24,259 13,678 56.4
Colorectal 22,134 11,362 51.3 21,242 N/A N/A 18,070 9,846 54.5
Lung 31,966 16,266 50.9 30,558 N/A N/A 17,880 9,560 53.5
Prostate 36,057 15,048 41.7 33,709 N/A N/A 34,619 15,649 45.2
Other 90,688 44,402 49.0 86,820 N/A N/A 67,276 34,379 51.1
All other primary cancers6 70,863 33,635 47.5 68,581 N/A N/A 56,419 28,317 50.2
2008 All first primary cancers5 199,976 99,727 49.9 189,788 90,228 47.5 156,544 80,886 51.7
Breast 25,393 13,273 52.3 23,850 11,970 50.2 24,166 13,259 54.9
Colorectal 20,986 11,048 52.6 20,131 10,042 49.9 16,920 9,272 54.8
Lung 31,246 16,432 52.6 29,805 14,991 50.3 17,526 9,594 54.7
Prostate 32,397 13,891 42.9 30,113 12,111 40.2 31,086 14,251 45.8
Other 89,954 45,083 50.1 85,889 41,114 47.9 66,846 34,510 51.6
All other primary cancers6 71,987 34,488 47.9 69,485 31,864 45.9 57,473 28,713 50.0
2009 All first primary cancers5 194,691 98,655 50.7 185,071 90,146 48.7 152,725 80,362 52.6
Breast 25,295 13,416 53.0 23,832 12,272 51.5 24,018 13,459 56.0
Colorectal 19,589 10,312 52.6 18,798 9,510 50.6 15,777 8,653 54.8
Lung 30,424 16,146 53.1 29,101 14,923 51.3 17,274 9,593 55.5
Prostate 30,133 13,339 44.3 28,033 11,682 41.7 28,918 13,672 47.3
Other 89,250 45,442 50.9 85,307 41,759 49.0 66,738 34,985 52.4
All other primary cancers6 73,100 36,028 49.3 70,782 33,632 47.5 58,664 30,129 51.4
2010 All first primary cancers5 190,322 97,956 51.5 181,272 89,885 49.6 149,136 80,575 54.0
Breast 24,593 13,198 53.7 23,19 12,11 52. 23,388 13,298 56.9
Colorectal 18,806 10,001 53.2 18,080 9,235 51.1 15,122 8,500 56.2
Lung 29,438 15,879 53.9 28,263 14,676 51.9 16,574 9,435 56.9
Prostate 28,549 13,043 45.7 26,625 11,533 43.3 27,272 13,404 49.1
Other 88,936 45,835 51.5 85,110 42,322 49.7 66,780 35,938 53.8
All other primary cancers6 73,597 36,953 50.2 71,341 34,760 48.7 59,407 31,266 52.6
2011 All first primary cancers5 190,223 100,580 52.9 180,926 91,096 50.3 150,041 86,789 57.8
Breast 24,927 13,787 55.3 23,447 12,468 53.2 23,724 14,360 60.5
Colorectal 18,020 9,971 55.3 17,314 9,093 52.5 14,537 8,771 60.3
Lung 28,664 15,622 54.5 27,484 14,329 52.1 16,432 9,838 59.9
Prostate 28,662 13,566 47.3 26,734 11,899 44.5 27,468 14,670 53.4
Other 89,950 47,634 53.0 85,947 43,307 50.4 67,880 39,150 57.7
All other primary cancers6 74,445 38,498 51.7 72,041 35,519 49.3 60,616 34,314 56.6
2012 All first primary cancers5 185,125 105,050 56.7 173,830 90,278 51.9 145,697 98,494 67.6
Breast 25,214 14,828 58.8 23,368 12,590 53.9 24,006 16,922 70.5
Colorectal 17,321 10,087 58.2 16,449 8,784 53.4 14,025 9,662 68.9
Lung 28,499 16,627 58.3 27,040 14,631 54.1 16,385 11,231 68.5
Prostate 24,019 12,326 51.3 21,947 10,040 45.7 22,912 14,627 63.8
Other 90,072 51,182 56.8 85,026 44,233 52.0 68,369 46,052 67.4
All other primary cancers6 76,754 43,046 56.1 73,777 37,789 51.2 62,081 41,527 66.9
2013 All first primary cancers5 182,953 119,161 65.1 172,516 95,242 55.2 144,206 100,266 69.5
Breast 24,747 16,732 67.6 23,053 13,291 57.7 23,596 17,042 72.2
Colorectal 16,454 10,811 65.7 15,633 8,724 55.8 13,189 9,267 70.3
Lung 27,645 18,326 66.3 26,342 15,072 57.2 16,107 11,377 70.6
Prostate 23,108 13,990 60.5 21,315 10,558 49.5 21,971 14,489 65.9
Other 90,999 59,302 65.2 86,173 47,597 55.2 69,343 48,091 69.4
All other primary cancers6 77,690 50,609 65.1 74,852 41,089 54.9 63,398 43,819 69.1
2014 All first primary cancers5 183,372 123,409 67.3 173,363 110,832 63.9 144,586 102,749 71.1
Breast 24,867 17,399 70.0 23,202 15,505 66.8 23,641 17,508 74.1
Colorectal 16,001 10,700 66.9 15,187 9,566 63.0 12,879 9,152 71.1
Lung 27,747 18,859 68.0 26,508 17,179 64.8 16,292 11,650 71.5
Prostate 22,254 14,023 63.0 20,581 12,088 58.7 21,064 14,229 67.6
Other 92,503 62,428 67.5 87,885 56,494 64.3 70,710 50,210 71.0
All other primary cancers6 78,276 53,211 68.0 75,488 49,002 64.9 64,069 45,589 71.2
2015 All first primary cancers5 185,938 128,674 69.2 175,784 115,850 65.9 148,327 108,160 72.9
Breast 25,202 18,252 72.4 23,624 16,368 69.3 24,094 18,284 75.9
Colorectal 16,005 11,020 68.9 15,232 9,973 65.5 12,823 9,332 72.8
Lung 27,485 19,023 69.2 26,225 17,418 66.4 16,491 12,133 73.6
Prostate 23,936 15,777 65.9 22,244 13,716 61.7 22,864 15,927 69.7
Other 93,310 64,602 69.2 88,459 58,375 66.0 72,055 52,484 72.8
All other primary cancers6 79,072 55,474 70.2 76,393 51,409 67.3 65,422 47,838 73.1
2016 All first primary cancers5 187,809 132,684 70.6 177,762 120,286 67.7 151,537 112,403 74.2
Breast 25,393 18,741 73.8 23,757 16,852 70.9 24,336 18,790 77.2
Colorectal 15,312 10,650 69.6 14,526 9,686 66.7 12,375 9,110 73.6
Lung 27,007 19,067 70.6 25,878 17,575 67.9 16,510 12,349 74.8
Prostate 25,580 17,308 67.7 23,825 15,271 64.1 24,515 17,513 71.4
Other 94,517 66,918 70.8 89,776 60,902 67.8 73,801 54,641 74.0
All other primary cancers6 80,108 57,566 71.9 77,448 53,673 69.3 66,745 49,841 74.7
2017 All first primary cancers5 186,510 133,991 71.8 176,345 121,626 69.0 151,412 113,186 74.8
Breast 24,820 18,562 74.8 23,240 16,680 16,680 23,760 18,399 77.4
Colorectal 14,739 10,508 71.3 14,021 9,561 68.2 11,959 8,938 74.7
Lung 26,486 18,913 71.4 25,316 17,431 68.9 16,582 12,417 74.9
Prostate 26,835 18,466 68.8 24,985 16,276 65.1 25,840 18,559 71.8
Other 93,630 67,542 72.1 88,783 61,678 69.5 73,271 54,873 74.9
All other primary cancers6 81,422 59,520 73.1 78,652 55,714 70.8 68,122 51,328 75.3
2018 All first primary cancers5 183,081 132,138 72.2 173,127 121,052 69.9 149,294 112,026 75.0
Breast 24,965 18,860 75.5 23,386 17,241 73.7 23,912 18,625 77.9
Colorectal 14,391 10,216 71.0 13,671 9,352 68.4 11,577 8,653 74.7
Lung 25,193 18,109 71.9 23,985 16,790 70.0 16,112 12,124 75.2
Prostate 27,289 18,927 69.4 25,448 16,881 66.3 26,240 18,917 72.1
Other 91,243 66,026 72.4 86,637 60,788 70.2 71,453 53,707 75.2
All other primary cancers6 81,865 60,427 73.8 79,101 57,083 72.2 69,278 52,489 75.8
2019 All first primary cancers5 182,275 132,542 72.7 172,707 121,794 70.5 149,121 112,750 75.6
Breast 25,041 18,923 75.6 23,542 17,348 73.7 24,011 18,679 77.8
Colorectal 13,713 9,810 71.5 13,075 9,005 68.9 10,964 8,261 75.3
Lung 24,794 17,973 72.5 23,711 16,752 70.7 16,025 12,184 76.0
Prostate 27,753 19,444 70.1 25,940 17,422 67.2 26,695 19,564 73.3
Other 90,974 66,392 73.0 86,439 61,267 70.9 71,426 54,062 75.7
All other primary cancers6 83,724 62,252 74.4 80,966 58,822 72.7 70,717 53,954 76.3
2020 All first primary cancers5 159,692 116,291 72.8 151,427 107,182 70.8 127,799 97,466 76.3
Breast 21,239 16,038 75.5 19,916 14,730 74.0 20,199 15,807 78.3
Colorectal 11,655 8,313 71.3 11,144 7,662 68.8 9,024 6,843 75.8
Lung 20,977 15,171 72.3 19,985 14,125 70.7 13,078 9,957 76.1
Prostate 24,500 17,282 70.5 22,958 15,524 67.6 23,410 17,384 74.3
Other 81,321 59,487 73.2 77,424 55,141 71.2 62,088 47,475 76.5
All other primary cancers6 75,790 56,557 74.6 73,304 53,625 73.2 63,241 48,811 77.2
2021 All first primary cancers5 165,099 122,655 74.3 156,636 112,698 71.9 134,959 104,131 77.2
Breast 23,673 18,317 77.4 22,329 16,771 75.1 22,721 18,050 79.4
Colorectal 11,769 8,548 72.6 11,223 7,841 69.9 9,354 7,144 76.4
Lung 20,253 14,899 73.6 19,292 13,761 71.3 12,910 9,961 77.2
Prostate 26,268 19,184 73.0 24,642 17,285 70.1 25,304 19,167 75.7
Other 83,136 61,707 74.2 79,150 57,040 72.1 64,670 49,809 77.0
All other primary cancers6 78,808 60,091 76.2 76,324 56,851 74.5 66,098 51,704 78.2
1: All included cancer patients were enrolled in Medicare Part A and Part B and not in HMO in the month of diagnosis.
2: Age 65+ at time of diagnosis.
3: Age 66+ at time of diagnosis.
4: Age 65+ at diagnosis and survived to at least the beginning of the calendar year after diagnosis.
5: Sequence number 00 or 01.
6: Sequence number is 02+.

Part D Claims Data for 2006 not available.

Number of SEER-Medicare Patients with Part D Enrollment by Diagnosis Year 2007-2021, Managed Care Only7
Diagnosis Year Cancer Site Cancer patients8 Enrolled in Part D during the calendar year of diagnosis Cancer patients9 Enrolled in Part D during the calendar year prior to diagnosis Cancer patients10 Enrolled in Part D during the calendar year after diagnosis
N N % N N % N N %
2007 All first primary cancers11 64,553 57,716 89.4 61,422 N/A N/A 51,418 46,439 90.3
Breast 8,245 7,457 90.4 7,735 N/A N/A 7,926 7,258 91.6
Colorectal 7,057 6,364 90.2 6,777 N/A N/A 5,806 5,280 90.9
Lung 9,453 8,479 89.7 9,070 N/A N/A 5,347 4,841 90.5
Prostate 12,188 10,864 89.1 11,383 N/A N/A 11,776 10,591 89.9
Other 27,610 24,552 88.9 26,457 N/A N/A 20,563 18,469 89.8
All other primary cancers12 20,313 17,963 88.4 19,630 N/A N/A 16,250 14,571 89.7
2008 All first primary cancers11 70,379 64,008 90.9 66,596 58,104 87.2 56,133 51,240 91.3
Breast 9,129 8,421 92.2 8,533 7,619 89.3 8,795 8,151 92.7
Colorectal 7,679 7,042 91.7 7,347 6,470 88.1 6,434 5,928 92.1
Lung 10,464 9,436 90.2 9,993 8,692 87.0 5,982 5,430 90.8
Prostate 11,989 10,853 90.5 11,113 9,513 85.6 11,583 10,483 90.5
Other 31,118 28,256 90.8 29,610 25,810 87.2 23,339 21,248 91.0
All other primary cancers12 23,090 20,790 90.0 22,296 19,193 86.1 18,706 16,905 90.4
2009 All first primary cancers11 76,007 69,381 91.3 72,182 64,239 89.0 60,769 55,506 91.3
Breast 10,228 9,438 92.3 9,526 8,683 91.2 9,839 9,115 92.6
Colorectal 7,672 7,046 91.8 7,349 6,555 89.2 6,367 5,876 92.3
Lung 11,221 10,237 91.2 10,752 9,571 89.0 6,497 5,942 91.5
Prostate 12,993 11,780 90.7 12,098 10,559 87.3 12,544 11,314 90.2
Other 33,893 30,880 91.1 32,457 28,871 89.0 25,522 23,259 91.1
All other primary cancers12 25,464 23,021 90.4 24,604 21,668 88.1 20,644 18,602 90.1
2010 All first primary cancers11 76,702 71,050 92.6 72,962 65,826 90.2 61,375 57,037 92.9
Breast 10,192 9,555 93.8 9,552 8,808 92.2 9,802 9,229 94.2
Colorectal 7,311 6,797 93.0 7,002 6,295 89.9 6,093 5,687 93.3
Lung 11,306 10,486 92.7 10,865 9,874 90.9 6,480 6,013 92.8
Prostate 12,726 11,646 91.5 11,881 10,525 88.6 12,314 11,296 91.7
Other 35,167 32,566 92.6 33,662 30,324 90.1 26,686 24,812 93.0
All other primary cancers12 26,191 24,062 91.9 25,372 22,612 89.1 21,303 19,630 92.1
2011 All first primary cancers11 78,883 73,067 92.6 74,952 68,014 90.7 63,899 60,215 94.2
Breast 10,903 10,203 93.6 10,177 9,416 92.5 10,494 9,996 95.3
Colorectal 7,395 6,913 93.5 7,085 6,476 91.4 6,199 5,863 94.6
Lung 11,201 10,442 93.2 10,798 9,869 91.4 6,646 6,295 94.7
Prostate 12,914 11,843 91.7 12,004 10,690 89.1 12,531 11,666 93.1
Other 36,470 33,666 92.3 34,888 31,563 90.5 28,029 26,395 94.2
All other primary cancers12 27,989 25,576 91.4 27,136 24,286 89.5 23,007 21,486 93.4
2012 All first primary cancers11 82,653 77,393 93.6 77,744 70,693 90.9 66,689 63,605 95.4
Breast 11,655 11,005 94.4 10,740 9,974 92.9 11,241 10,808 96.1
Colorectal 7,747 7,308 94.3 7,278 6,651 91.4 6,501 6,220 95.7
Lung 11,744 11,045 94.0 11,224 10,260 91.4 6,883 6,585 95.7
Prostate 11,977 11,079 92.5 10,984 9,770 88.9 11,525 10,926 94.8
Other 39,530 36,956 93.5 37,518 34,038 90.7 30,539 29,066 95.2
All other primary cancers12 30,092 27,899 92.7 28,950 25,982 89.7 24,598 23,268 94.6
2013 All first primary cancers11 90,835 87,053 95.8 85,648 78,737 91.9 73,049 70,332 96.3
Breast 13,005 12,563 96.6 12,079 11,232 93.0 12,551 12,161 96.9
Colorectal 8,229 7,899 96.0 7,834 7,186 91.7 6,919 6,668 96.4
Lung 13,230 12,708 96.1 12,651 11,724 92.7 7,723 7,453 96.5
Prostate 12,582 12,021 95.5 11,618 10,537 90.7 12,109 11,616 95.9
Other 43,789 41,862 95.6 41,466 38,058 91.8 33,747 32,434 96.1
All other primary cancers12 33,718 32,114 95.2 32,473 29,724 91.5 27,748 26,571 95.8
2014 All first primary cancers11 97,324 93,974 96.6 92,107 86,324 93.7 78,167 75,558 96.7
Breast 13,976 13,529 96.8 12,965 12,282 94.7 13,444 13,065 97.2
Colorectal 8,635 8,370 96.9 8,155 7,668 94.0 7,221 7,021 97.2
Lung 13,906 13,443 96.7 13,347 12,557 94.1 8,221 7,954 96.8
Prostate 12,446 11,960 96.1 11,621 10,699 92.1 11,874 11,422 96.2
Other 48,361 46,672 96.5 46,019 43,118 93.7 37,407 36,096 96.5
All other primary cancers12 36,302 34,920 96.2 35,034 32,553 92.9 29,999 28,906 96.4
2015 All first primary cancers11 105,678 102,382 96.9 100,295 96,263 96.0 85,062 82,584 97.1
Breast 15,232 14,902 97.8 14,281 13,940 97.6 14,700 14,412 98.0
Colorectal 8,877 8,627 97.2 8,426 8,121 96.4 7,294 7,100 97.3
Lung 14,918 14,416 96.6 14,371 13,770 95.8 8,943 8,655 96.8
Prostate 14,173 13,693 96.6 13,263 12,541 94.6 13,558 13,104 96.7
Other 52,478 50,744 96.7 49,954 47,891 95.9 40,567 39,313 96.9
All other primary cancers12 38,730 37,385 96.5 37,510 35,868 95.6 32,071 31,044 96.8
2016 All first primary cancers11 110,103 106,991 97.2 104,654 100,836 96.4 89,043 86,480 97.1
Breast 15,684 15,326 97.7 14,735 14,393 97.7 15,149 14,813 97.8
Colorectal 9,314 9,101 97.7 8,869 8,558 96.5 7,748 7,553 97.5
Lung 15,414 14,957 97.0 14,849 14,300 96.3 9,403 9,107 96.9
Prostate 15,161 14,644 96.6 14,124 13,424 95.0 14,573 14,077 96.6
Other 54,530 52,963 97.1 52,077 50,161 96.3 42,170 40,930 97.1
All other primary cancers12 40,690 39,391 96.8 39,418 37,771 95.8 33,895 32,805 96.8
2017 All first primary cancers11 119,820 116,816 97.5 113,897 110,327 96.9 98,275 95,760 97.4
Breast 17,199 16,866 98.1 16,083 15,810 98.3 16,658 16,328 98.0
Colorectal 9,791 9,544 97.5 9,334 9,006 96.5 8,166 7,969 97.6
Lung 16,395 15,980 97.5 15,775 15,302 97.0 10,389 10,110 97.3
Prostate 17,480 16,990 97.2 16,383 15,747 96.1 16,857 16,372 97.1
Other 58,955 57,436 97.4 56,322 54,462 96.7 46,205 44,981 97.4
All other primary cancers12 45,703 44,430 97.2 44,306 42,638 96.2 38,277 37,175 97.1
2018 All first primary cancers11 126,849 123,979 97.7 120,417 117,301 97.4 103,784 101,370 97.7
Breast 18,356 18,031 98.2 17,270 16,949 98.1 17,673 17,346 98.1
Colorectal 10,038 9,819 97.8 9,549 9,291 97.3 8,226 8,043 97.8
Lung 17,261 16,912 98.0 16,515 16,189 98.0 11,022 10,797 98.0
Prostate 19,014 18,550 97.6 17,802 17,181 96.5 18,323 17,847 97.4
Other 62,180 60,667 97.6 59,281 57,691 97.3 48,540 47,337 97.5
All other primary cancers12 50,186 48,787 97.2 48,581 47,035 96.8 42,244 41,050 97.2
2019 All first primary cancers11 137,766 134,721 97.8 131,008 127,765 97.5 112,697 109,845 97.5
Breast 19,542 19,228 98.4 18,416 18,153 98.6 18,849 18,476 98.0
Colorectal 10,588 10,340 97.7 10,120 9,777 96.6 8,740 8,517 97.4
Lung 18,679 18,283 97.9 17,901 17,533 97.9 12,053 11,783 97.8
Prostate 21,109 20,613 97.7 19,760 19,132 96.8 20,327 19,767 97.2
Other 67,848 66,257 97.7 64,811 63,170 97.5 52,728 51,302 97.3
All other primary cancers12 55,395 54,003 97.5 53,628 52,144 97.2 46,725 45,345 97.0
2020 All first primary cancers11 132,249 129,039 97.6 125,434 121,818 97.1 105,483 103,213 97.8
Breast 18,189 17,849 98.1 17,029 16,724 98.2 17,405 17,128 98.4
Colorectal 10,005 9,747 97.4 9,501 9,124 96.0 7,972 7,794 97.8
Lung 17,777 17,365 97.7 16,990 16,632 97.9 10,967 10,739 97.9
Prostate 20,216 19,666 97.3 18,966 18,141 95.7 19,294 18,845 97.7
Other 66,062 64,412 97.5 62,948 61,197 97.2 49,845 48,707 97.7
All other primary cancers12 54,012 52,493 97.2 52,152 50,624 97.1 44,807 43,746 97.6
2021 All first primary cancers11 155,983 152,125 97.5 147,879 142,440 96.3 126,443 123,185 97.4
Breast 22,955 22,508 98.1 21,563 21,010 97.4 22,102 21,644 97.9
Colorectal 11,686 11,382 97.4 11,125 10,598 95.3 9,354 9,101 97.3
Lung 20,076 19,618 97.7 19,144 18,696 97.7 12,529 12,234 97.6
Prostate 24,999 24,346 97.4 23,370 22,196 95.0 23,987 23,340 97.3
Other 76,267 74,271 97.4 72,677 69,940 96.2 58,471 56,866 97.3
All other primary cancers12 62,832 61,035 97.1 60,770 58,318 96.0 52,352 50,819 97.1
7: All included cancer patients were enrolled in Medicare Part A and Part B and in HMO during the year of interest.
8: Age 65+ at time of diagnosis.
9: Age 66+ at time of diagnosis.
10: Age 65+ at diagnosis and survived to at least the beginning of the calendar year after diagnosis.
11: Sequence number 00 or 01.
12: Sequence number is 02+.

Part D Claims Data for 2006 not available.

Beneficiaries Included in the 5% Non-cancer Sample

The following tables list the number of persons appearing in the SEER-Medicare data from the 5% Non-cancer Medicare Beneficiary Sample who are enrolled in Medicare Part D as well as the total number of persons who were eligible to enroll from the sample. The tables were generated separately for patients not enrolled in Managed Care and for those enrolled in Managed Care only. The data are displayed by year, beginning in 2007.

Number of Medicare benificaries included in the SEER-Medicare 5% non-cancer sample by Part D enrollment status and calendar year13
Calendar Year Total Enrolled in Part D
N N %
2007 623,893 286,362 45.9%
2008 621,330 286,924 46.2%
2009 620,163 285,780 46.1%
2010 627,393 289,572 46.2%
2011 642,694 300,846 46.8%
2012 656,224 320,420 48.8%
2013 664,634 365,167 54.9%
2014 671,046 375,734 56.0%
2015 682,996 388,811 56.9%
2016 702,085 407,477 58.0%
2017 715,484 418,851 58.5%
2018 724,405 422,299 58.3%
2019 729,296 428,884 58.8%
2020 728,511 430,114 59.0%
2021 710,700 424,219 59.7%
2022 695,935 422,302 60.7%

13: To be included individuals had to be eligible for Medicare entitlement, had to be 65+ years during the calendar year, could not be enrolled in an HMO during the calendar year and could not be known to have a prior history of cancer; individuals were excluded if sumstat=2 or keepflg=0.

Number of Medicare benificaries included in the SEER-Medicare 5% non-cancer sample by Part D enrollment status and calendar year, Managed Care Only14
Calendar Year Total Enrolled in Part D
N N %
2007 170,652 154,827 90.7%
2008 187,762 172,261 91.7%
2009 202,852 186,767 92.1%
2010 212,740 198,351 93.2%
2011 223,997 209,362 93.5%
2012 244,981 230,615 94.1%
2013 270,844 260,515 96.2%
2014 300,115 290,748 96.9%
2015 326,302 316,920 97.1%
2016 346,780 338,000 97.5%
2017 377,799 369,413 97.8%
2018 414,044 405,539 97.9%
2019 451,522 442,716 98.0%
2020 497035 486113 97.8%
2021 550318 537588 97.7%
2022 599148 584037 97.5%

14: To be included individuals had to be eligible for Medicare entitlement, had to be 65+ years during the calendar year, had to be enrolled in an HMO during the calendar year and could not be known to have a prior history of cancer; individuals were excluded if sumstat=2 or keepflg=0.

Last Updated: 02 Apr, 2025