CMS-HCC Risk Adjustment · Retired Model V24 Archive

CMS-HCC V24 Model Archive ICD-10-CM

The CMS-HCC V24 model paid Medicare Advantage risk scores through payment year 2025 and was retired when V28 took over 100% of payment in 2026. Its 86 payment categories and 10,211 diagnosis mappings stay browsable here for lookback analysis and RADV audit periods that predate the transition. Each category links to its archived code list and to the live V28 categories its codes moved to; for the change story, see V24 to V28: What Changed.

✗ Retired model · not used for current Medicare Advantage paymentLast paid PY 2025 · kept for lookback and RADV reference

Payment Categories

10,211

Code Mappings

PY 2025

Last Paid Year

2,267

Codes With No V28 Successor

CMS-HCC V24

All 86 V24 Categories 10,211 code mappings

86 of 86 shown

V24 HCC	Codes Mapped	Dropped in V28	Live V28 Successors
HCC 1	3	0	HCC 1 · 3
HCC 2	53	2	HCC 2 · 51 HCC 6 · 1
HCC 6	37	0	HCC 6 · 37 HCC 2 · 1
HCC 8	82	0	HCC 17 · 57 HCC 18 · 22 HCC 22 · 3
HCC 9	110	0	HCC 20 · 90 HCC 19 · 14 HCC 17 · 3+1 more
HCC 10	595	13	HCC 21 · 332 HCC 20 · 142 HCC 22 · 43+4 more
HCC 11	133	0	HCC 21 · 77 HCC 22 · 55 HCC 20 · 1
HCC 12	271	1	HCC 23 · 220 HCC 21 · 47 HCC 17 · 3
HCC 17	23	5	HCC 36 · 18
HCC 18	400	80	HCC 37 · 308 HCC 298 · 148 HCC 38 · 12+2 more
HCC 19	6	1	HCC 38 · 5
HCC 21	11	11	All 11 codes dropped
HCC 22	9	0	HCC 48 · 9
HCC 23	242	189	HCC 50 · 25 HCC 49 · 13 HCC 51 · 11+3 more
HCC 27	15	2	HCC 63 · 13
HCC 28	10	1	HCC 64 · 5 HCC 63 · 2 HCC 68 · 2
HCC 29	11	0	HCC 65 · 11
HCC 33	56	0	HCC 78 · 56 HCC 81 · 7 HCC 80 · 4
HCC 34	2	0	HCC 79 · 2
HCC 35	77	0	HCC 81 · 49 HCC 80 · 28 HCC 78 · 11
HCC 39	652	44	HCC 92 · 608
HCC 40	648	71	HCC 93 · 504 HCC 94 · 69 HCC 280 · 6+2 more
HCC 46	95	5	HCC 108 · 36 HCC 109 · 25 HCC 107 · 14+4 more
HCC 47	72	34	HCC 114 · 18 HCC 115 · 15 HCC 454 · 4+1 more
HCC 48	72	39	HCC 112 · 19 HCC 21 · 5 HCC 108 · 3+3 more
HCC 51	67	0	HCC 127 · 37 HCC 125 · 15 HCC 126 · 15
HCC 52	61	22	HCC 127 · 28 HCC 200 · 5 HCC 125 · 3+1 more
HCC 54	116	0	HCC 135 · 97 HCC 136 · 19
HCC 55	328	20	HCC 137 · 281 HCC 139 · 27
HCC 56	14	0	HCC 138 · 14
HCC 57	12	0	HCC 151 · 12
HCC 58	4	0	HCC 152 · 4
HCC 59	831	427	HCC 155 · 369 HCC 154 · 27 HCC 152 · 8
HCC 60	16	0	HCC 153 · 16
HCC 70	33	0	HCC 180 · 33
HCC 71	18	0	HCC 181 · 18
HCC 72	354	90	HCC 182 · 249 HCC 200 · 11 HCC 190 · 4
HCC 73	7	0	HCC 190 · 7
HCC 74	7	0	HCC 192 · 6 HCC 191 · 1
HCC 75	52	16	HCC 93 · 24 HCC 196 · 9 HCC 193 · 2+1 more
HCC 76	20	0	HCC 197 · 20
HCC 77	12	0	HCC 198 · 12
HCC 78	20	3	HCC 199 · 16 HCC 200 · 1
HCC 79	63	0	HCC 201 · 63
HCC 80	51	5	HCC 202 · 46
HCC 82	12	0	HCC 211 · 12
HCC 83	1	0	HCC 212 · 1
HCC 84	27	6	HCC 213 · 21
HCC 85	63	1	HCC 226 · 34 HCC 227 · 14 HCC 225 · 5+4 more
HCC 86	22	0	HCC 228 · 18 HCC 229 · 4
HCC 87	21	0	HCC 229 · 21
HCC 88	37	37	All 37 codes dropped
HCC 96	20	3	HCC 238 · 17
HCC 99	33	0	HCC 248 · 33
HCC 100	99	4	HCC 249 · 95
HCC 103	45	0	HCC 253 · 45
HCC 104	119	0	HCC 254 · 119
HCC 106	128	1	HCC 263 · 127 HCC 383 · 90 HCC 37 · 4
HCC 107	145	33	HCC 383 · 58 HCC 264 · 41 HCC 267 · 13
HCC 108	327	139	HCC 267 · 152 HCC 264 · 30 HCC 37 · 4+1 more
HCC 110	5	0	HCC 277 · 5
HCC 111	17	0	HCC 280 · 17
HCC 112	81	16	HCC 280 · 62 HCC 93 · 5 HCC 278 · 3+1 more
HCC 114	15	0	HCC 282 · 14 HCC 211 · 1
HCC 115	32	25	HCC 283 · 7
HCC 122	128	24	HCC 298 · 104 HCC 37 · 96 HCC 108 · 4
HCC 124	16	0	HCC 300 · 16
HCC 134	52	52	All 52 codes dropped
HCC 135	5	5	All 5 codes dropped
HCC 136	5	0	HCC 326 · 5 HCC 226 · 1
HCC 137	1	0	HCC 327 · 1
HCC 138	3	0	HCC 329 · 2 HCC 328 · 1
HCC 157	25	0	HCC 379 · 25
HCC 158	50	0	HCC 381 · 50
HCC 159	25	0	HCC 382 · 25
HCC 161	292	2	HCC 383 · 194 HCC 380 · 96 HCC 263 · 90+1 more
HCC 162	96	6	HCC 385 · 90
HCC 166	76	0	HCC 397 · 76
HCC 167	496	251	HCC 399 · 188 HCC 398 · 57
HCC 169	339	0	HCC 401 · 339
HCC 170	729	0	HCC 402 · 729
HCC 173	145	34	HCC 405 · 108 HCC 267 · 2 HCC 2 · 1
HCC 176	325	325	All 325 codes dropped
HCC 186	51	0	HCC 276 · 17 HCC 221 · 15 HCC 454 · 10+4 more
HCC 188	41	0	HCC 463 · 41
HCC 189	291	250	HCC 409 · 41

Counts reflect the model's last paid year (payment year 2025). Successor chips open the live V28 category pages.

Questions About the V24 Archive

Is CMS-HCC V24 still used for anything?

Not for Medicare Advantage payment: V28 determines 100% of the MA risk score from payment year 2026. V24 remains relevant for lookback analysis and Risk Adjustment Data Validation (RADV) audits covering years before the transition, and the related V22 model still pays PACE organizations.

Why do V24 and V28 category numbers disagree?

V28 rebuilt and renumbered the model almost completely, so the same number rarely means the same condition in both versions: HCC 18 is a diabetes category in V24 but a cancer category in V28. When a report, chart note, or vendor file cites an HCC number, first confirm which model version it refers to. The V24 to V28 crosswalk maps every V24 category to its successors.

What years does this archive cover?

The V24 model entered Medicare Advantage payment in 2020 and last determined a share of it in payment year 2025, blended with V28 during the transition. The mappings shown are the final ones CMS published for V24, from the payment year 2025 files.

Official Sources

CMS Risk Adjustment ICD-10-CM MappingsThe category tables and every code-to-HCC mapping on ICD List come from the published mapping files.
CMS-HCC Model SoftwareSource of all RAF weights, category labels, and hierarchy rules, including the PACE, ESRD, and RxHCC models.

ICD List is not affiliated with CMS. This page is a coding and payment reference, not medical or actuarial advice.

Related References

All Live V28 Categories V24 to V28: What Changed Codes That No Longer Risk-Adjust ICD-10-CM Code Lookup

Source: Centers for Medicare & Medicaid Services, Payment Year 2026 risk adjustment mapping and model software releases (CMS-HCC V28; CMS-HCC V24 from the last published V24 mappings, payment year 2025), applied to the FY 2026 ICD-10-CM code set.