Code Set Change Ledger

ICD-10-CM

Diagnosis codes · Annual, effective October 1

MedCoder records additions, deletions, description changes and billable-status changes for every release from FY2017, each diffed from CMS's code files for that release and the one before it. Tabular instruction changes are recorded from FY2027, the first release whose tabular file is diffed against the previous one.

• ICD-10-CM FY2027 changesCurrent release
  Effective October 1, 2026
  238 added · 21 deleted · 4 descriptions revised · 4 short descriptions revised · 15 billable → non-billable · 1,821 tabular instruction changes
  1,138 codes with recorded changes
• ICD-10-CM FY2026 changesHistorical release
  Effective October 1, 2025
  614 added · 12 deleted · 44 descriptions revised · 44 short descriptions revised · 16 billable → non-billable
  686 codes with recorded changes
• ICD-10-CM FY2025 changesHistorical release
  Effective October 1, 2024
  291 added · 3 deleted · 15 descriptions revised · 15 short descriptions revised · 33 billable → non-billable
  341 codes with recorded changes
• ICD-10-CM FY2024 changesHistorical release
  Effective October 1, 2023
  551 added · 19 descriptions revised · 28 short descriptions revised · 32 billable → non-billable
  610 codes with recorded changes
• ICD-10-CM FY2023 changesHistorical release
  Effective October 1, 2022
  1,468 added · 251 deleted · 40 descriptions revised · 40 short descriptions revised · 36 billable → non-billable
  1,790 codes with recorded changes
• ICD-10-CM FY2022 changesHistorical release
  Effective October 1, 2021
  201 added · 25 deleted · 30 descriptions revised · 30 short descriptions revised · 16 billable → non-billable
  271 codes with recorded changes
• ICD-10-CM FY2021 changesHistorical release
  Effective October 1, 2020
  613 added · 26 deleted · 55 descriptions revised · 55 short descriptions revised · 39 billable → non-billable
  730 codes with recorded changes
• ICD-10-CM FY2020 changesHistorical release
  Effective October 1, 2019
  328 added · 7 deleted · 36 descriptions revised · 30 short descriptions revised · 14 billable → non-billable · 1 became billable
  385 codes with recorded changes
• ICD-10-CM FY2019 changesHistorical release
  Effective October 1, 2018
  320 added · 3 deleted · 130 descriptions revised · 134 short descriptions revised · 48 billable → non-billable
  505 codes with recorded changes
• ICD-10-CM FY2018 changesHistorical release
  Effective October 1, 2017
  419 added · 122 deleted · 272 descriptions revised · 283 short descriptions revised · 34 billable → non-billable
  856 codes with recorded changes
• ICD-10-CM FY2017 changesHistorical release
  Effective October 1, 2016
  2,305 added · 212 deleted · 553 descriptions revised · 502 short descriptions revised · 128 billable → non-billable · 1 became billable
  3,197 codes with recorded changes

ICD-10-PCS

Inpatient procedure codes · Annual, effective October 1, with mid-year updates

MedCoder records additions, deletions and description changes for every release from FY2017, each diffed from CMS's code files for that release and the one before it. Tabular instruction changes are not recorded for ICD-10-PCS. 6 of these releases are compared against a snapshot rebuilt from CMS addenda because CMS no longer hosts the original file; each of those pages says so.

• ICD-10-PCS FY2027 changesCurrent release
  Effective October 1, 2026
  101 added · 38 deleted · 3 descriptions revised
  142 codes with recorded changes
• ICD-10-PCS FY2026 (April) changesHistorical release
  Effective April 1, 2026
  80 added · 2 deleted
  82 codes with recorded changes
• ICD-10-PCS FY2026 changesHistorical release
  Effective October 1, 2025
  156 added · 27 deleted
  183 codes with recorded changes
• ICD-10-PCS FY2025 (April) changesHistorical release
  Effective April 1, 2025
  50 added · 12 deleted · 2 descriptions revised
  64 codes with recorded changes
• ICD-10-PCS FY2025 changesHistorical release
  Effective October 1, 2024
  371 added · 61 deleted
  432 codes with recorded changes
• ICD-10-PCS FY2024 (April) changesHistorical release
  Effective April 1, 2024
  41 added · 6 deleted · 3 descriptions revised
  50 codes with recorded changes
• ICD-10-PCS FY2024 changesHistorical release
  Effective October 1, 2023
  78 added · 5 deleted · 14 descriptions revised
  97 codes with recorded changes
  Compared against a rebuilt snapshot
• ICD-10-PCS FY2023 (April) changesHistorical release
  Effective April 1, 2023
  34 added
  34 codes with recorded changes
• ICD-10-PCS FY2023 changesHistorical release
  Effective October 1, 2022
  331 added · 64 deleted
  395 codes with recorded changes
  Compared against a rebuilt snapshot
• ICD-10-PCS FY2022 (April) changesHistorical release
  Effective April 1, 2022
  9 added
  9 codes with recorded changes
  Compared against a rebuilt snapshot
• ICD-10-PCS FY2022 changesHistorical release
  Effective October 1, 2021
  191 added · 107 deleted · 62 descriptions revised
  360 codes with recorded changes
  Compared against a rebuilt snapshot
• ICD-10-PCS FY2021 (January) changesHistorical release
  Effective January 1, 2021
  21 added
  21 codes with recorded changes
• ICD-10-PCS FY2021 changesHistorical release
  Effective October 1, 2020
  544 added
  544 codes with recorded changes
  Compared against a rebuilt snapshot
• ICD-10-PCS FY2020 (August) changesHistorical release
  Effective August 1, 2020
  12 added
  12 codes with recorded changes
  Compared against a rebuilt snapshot
• ICD-10-PCS FY2020 changesHistorical release
  Effective October 1, 2019
  734 added · 2,056 deleted · 2 descriptions revised
  2,792 codes with recorded changes
• ICD-10-PCS FY2019 changesHistorical release
  Effective October 1, 2018
  392 added · 216 deleted · 8 descriptions revised
  616 codes with recorded changes
• ICD-10-PCS FY2018 changesHistorical release
  Effective October 1, 2017
  3,562 added · 646 deleted · 1,821 descriptions revised
  6,029 codes with recorded changes
• ICD-10-PCS FY2017 changesHistorical release
  Effective October 1, 2016
  3,827 added · 12 deleted · 491 descriptions revised
  4,330 codes with recorded changes

HCPCS Level II

Level II supplies, drugs and services codes · Quarterly (January, April, July, October), with occasional mid-quarter additions

For HCPCS Level II, MedCoder records each code's CMS add date and termination date from the alpha-numeric file. A deletion is listed on the first day the code is no longer valid (the day after its CMS termination date). Description revisions between quarterly files are not recorded as changes. Each quarter below lists the additions and terminations CMS dated in it, under each CMS effective date; each calendar year has a page listing all of them.

Quarterly releases

• HCPCS Level II October 2026Current release
  Effective October 1, 2026
  45 added · 15 deleted
• HCPCS Level II July 2026Historical release
  Effective July 1, 2026
  40 added · 1 deleted
• HCPCS Level II April 2026Historical release
  Effective April 1, 2026
  51 added · 6 deleted
• HCPCS Level II January 2026Historical release
  Effective January 1, 2026
  171 added · 95 deleted
• HCPCS Level II October 2025Historical release
  Effective October 1, 2025
  73 added · 7 deleted
• HCPCS Level II July 2025Historical release
  Effective July 1, 2025
  45 added · 16 deleted
• HCPCS Level II April 2025Historical release
  Effective April 1, 2025
  82 added · 18 deleted
• HCPCS Level II January 2025Historical release
  Effective January 1, 2025
  171 added · 80 deleted

By calendar year

• HCPCS 2026 changes
  307 added · 117 deleted
• HCPCS 2025 changes
  371 added · 121 deleted
• HCPCS 2024 changes
  534 added · 126 deleted
• HCPCS 2023 changes
  338 added · 70 deleted
• HCPCS 2022 changes
  214 added · 65 deleted
• HCPCS 2021 changes
  177 added · 204 deleted
• HCPCS 2020 changes
  301 added · 92 deleted
• HCPCS 2019 changes
  270 added · 65 deleted
• HCPCS 2018 changes
  186 added · 39 deleted
• HCPCS 2017 changes
  267 added · 143 deleted
• HCPCS 2016 changes
  274 added · 117 deleted
• HCPCS 2015 changes
  234 added · 162 deleted
• HCPCS 2014 changes
  280 added · 1 deleted
• HCPCS 2013 changes
  162 added
• HCPCS 2012 changes
  253 added
• HCPCS 2011 changes
  127 added
• HCPCS 2010 changes
  111 added
• HCPCS 2009 changes
  121 added
• HCPCS 2008 changes
  136 added
• HCPCS 2007 changes
  136 added
• HCPCS 2006 changes
  376 added
• HCPCS 2005 changes
  195 added
• HCPCS 2004 changes
  258 added
• HCPCS 2003 changes
  365 added
• HCPCS 2002 changes
  397 added
• HCPCS 2001 changes
  370 added
• HCPCS 2000 changes
  196 added
• HCPCS 1999 changes
  44 added
• HCPCS 1998 changes
  48 added
• HCPCS 1997 changes
  93 added
• HCPCS 1996 changes
  47 added
• HCPCS 1995 changes
  46 added
• HCPCS 1994 changes
  87 added
• HCPCS 1993 changes
  39 added
• HCPCS 1992 changes
  28 added
• HCPCS 1991 changes
  29 added
• HCPCS 1990 changes
  81 added
• HCPCS 1989 changes
  54 added
• HCPCS 1988 changes
  163 added
• HCPCS 1987 changes
  15 added
• HCPCS 1986 changes
  525 added
• HCPCS 1985 changes
  147 added
• HCPCS 1984 changes
  108 added
• HCPCS 1983 changes
  3 added
• HCPCS 1982 changes
  257 added

MS-DRG

Medicare severity diagnosis-related groups · Annual grouper version, effective October 1, with mid-year versions

DRGs added, deleted or retitled in each CMS grouper version, against the version before it. Changes to which codes group to a DRG are not recorded here. A version that changed no DRG number or title has a release record that says so.

• MS-DRG v44 changesCurrent release
  Effective October 1, 2026
  14 DRGs added · 18 DRGs deleted · 22 titles revised
• MS-DRG v43.1 release recordHistorical release
  Effective April 1, 2026
  No DRGs added, deleted, or retitled
  No DRGs added, deleted, or retitled
• MS-DRG v43 changesHistorical release
  Effective October 1, 2025
  5 DRGs added · 6 DRGs deleted · 6 titles revised
• MS-DRG v42.1 release recordHistorical release
  Effective April 1, 2025
  No DRGs added, deleted, or retitled
  No DRGs added, deleted, or retitled
• MS-DRG v42 changesHistorical release
  Effective October 1, 2024
  12 DRGs added · 5 DRGs deleted · 4 titles revised
• MS-DRG v41.1 release recordHistorical release
  Effective April 1, 2024
  No DRGs added, deleted, or retitled
  No DRGs added, deleted, or retitled
• MS-DRG v41 changesHistorical release
  Effective October 1, 2023
  15 DRGs added · 16 DRGs deleted · 6 titles revised
• MS-DRG v40.1 release recordHistorical release
  Effective April 1, 2023
  No DRGs added, deleted, or retitled
  No DRGs added, deleted, or retitled

ASP NDC-HCPCS Crosswalk

Medicare Part B drug NDC-to-HCPCS changes · Quarterly

NDC-HCPCS pairings added, removed or given new billable units in each quarterly CMS crosswalk for Medicare Part B drugs, against the quarter before it.

• ASP NDC-HCPCS Crosswalk October 2026 changesCurrent release
  Effective October 1, 2026
  327 pairings added · 290 pairings removed · 7 billable-unit changes