Medicare drug coverage

Arnuity: 2027 Medicare Part D coverage

5,009 of 5,495 Part D plans (91%) list Arnuity on their 2027 formulary, the same share as 2026. 99% of those require prior authorization, step therapy, or a quantity limit.

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2027 compared with 2026

Arnuity is number 195 by total Medicare Part D spending in 2024 ($200 million). Plans that list it most often put it on tier 3. Counts use 6 RxNorm products for this name.

Arnuity Part D coverage, 2026 and 2027
Measure20262027Change
Part D plans in the file5,5185,495-23
Plans that list it5,011 (91%)5,009 (91%)no change
Prior authorization (of plans that list it)0 (0%)0 (0%)no change
Step therapy (of plans that list it)0 (0%)0 (0%)no change
Quantity limit (of plans that list it)4,863 (97%)4,947 (99%)+2 points
Any of the three (of plans that list it)4,863 (97%)4,947 (99%)+2 points
Not listed or restricted (of all plans)5,370 (97%)5,433 (99%)+2 points

Source: CMS 2027 Part D formulary file (basic drugs and plan information), as of October 8, 2026. Publisher page

Source: CMS 2026 Part D formulary file (basic drugs and plan information), as of September 30, 2026. Publisher page

Formulary tier

Arnuity formulary tier, 2026 and 2027
Tier2026 plans2027 plans
Tier 1131 (3%)104 (2%)
Tier 251 (1%)315 (6%)
Tier 34,829 (96%)4,590 (92%)

Source: CMS 2027 Part D formulary file (basic drugs and plan information), as of October 8, 2026. Publisher page

Source: CMS 2026 Part D formulary file (basic drugs and plan information), as of September 30, 2026. Publisher page

Plan by plan, 2026 to 2027

4,380 plan ids are in both files. 62 of them (1%) added prior authorization, step therapy, or a quantity limit for Arnuity, and 22 stopped listing it.

Arnuity: plans in both 2026 and 2027
Plan by planPlans
Same plan id in both years4,380
Listed it in 2026, not in 202722 (1%)
Listed it in 2027, not in 202611 (0%)
Moved it to a higher tier38 (1%)
Added prior authorization0 (0%)
Added step therapy0 (0%)
Added a quantity limit62 (1%)
Added at least one of the three62 (1%)
Removed at least one of the three0 (0%)
Plan ids new in 20271,115
2026 plan ids not in the 2027 file1,138

Source: CMS 2027 Part D formulary file (basic drugs and plan information), as of October 8, 2026. Publisher page

Source: CMS 2026 Part D formulary file (basic drugs and plan information), as of September 30, 2026. Publisher page

States from most to least restrictive

Share of 2027 Part D plans offered in each state that leave Arnuity off the formulary or list it with prior authorization, step therapy, or a quantity limit. Alaska ranks first at 100%, with 0% of its plans using prior authorization or step therapy; Michigan ranks last at 78%. Ties break on the prior authorization or step therapy share.

States from most to least restrictive for Arnuity, 2027
RankState2027 plansNot listed or restrictedPrior auth or step therapyChange from 2026
1Alaska9100%0%no change
2Alabama115100%0%no change
3Arkansas86100%0%no change
4Arizona148100%0%+4 points
5California397100%0%+14 points
6Colorado106100%0%no change
7Connecticut54100%0%no change
8District of Columbia21100%0%no change
9Delaware43100%0%no change
10Florida549100%0%no change
11Georgia151100%0%no change
12Hawaii50100%0%no change
13Iowa64100%0%no change
14Idaho45100%0%no change
15Illinois133100%0%no change
16Indiana140100%0%no change
17Kansas84100%0%no change
18Kentucky123100%0%no change
19Louisiana126100%0%no change
20Massachusetts92100%0%no change
21Maryland49100%0%no change
22Maine52100%0%no change
23Minnesota63100%0%+3 points
24Missouri171100%0%no change
25Mississippi105100%0%no change
26Montana27100%0%no change
27North Carolina177100%0%+1 point
28North Dakota26100%0%+6 points
29Nebraska51100%0%no change
30New Hampshire25100%0%no change
31New Jersey74100%0%no change
32New Mexico68100%0%+5 points
33Nevada100100%0%+4 points
34Ohio173100%0%no change
35Oklahoma81100%0%no change
36Oregon92100%0%no change
37Rhode Island29100%0%no change
38South Carolina91100%0%no change
39South Dakota30100%0%no change
40Tennessee157100%0%no change
41Texas412100%0%+1 point
42Utah53100%0%no change
43Virginia145100%0%no change
44Vermont14100%0%no change
45Washington114100%0%+2 points
46Wisconsin97100%0%no change
47West Virginia70100%0%no change
48New York21597%0%no change
49Pennsylvania32496%0%no change
50Wyoming1385%0%-5 points
51Michigan18378%0%+1 point

Source: CMS CY2027 landscape file (states and parent organizations), as of September 30, 2026. Publisher page

Source: CMS 2027 Part D formulary file (basic drugs and plan information), as of October 8, 2026. Publisher page

By parent organization

164 parent organizations offer 2027 Part D plans. Humana Inc. has the most, 884, and 100% of them leave Arnuity off or restrict it.

Arnuity coverage by parent organization, 2027
Parent organization2027 plans ↓List itRestrict it (of listing)Not listed or restrictedChange from 2026Plans that added a restriction
DOCTORS HEALTHCARE PLANS, INC.9100%100%100%no change0
EmblemHealth, Inc.9100%100%100%no change0
Perennial Consortium, LLC9100%100%100%no change0
West Virginia United Health System, Inc.9100%100%100%no change0
Astiva Health Holdings Incorporated8100%100%100%no change0
Healthfirst, Inc.8100%100%100%no change0
Longevity Health Founders, LLC8100%100%100%no change0
MVP Health Care, Inc.8100%100%100%no change0
Martin's Point Health Care, Inc.8100%100%100%no change0
Triton Health Systems, L.L.C.8100%100%100%no change0
Allina Health and Aetna Insurance Holding Company7100%100%100%no change0
Baylor Scott & White Health7100%100%100%no change0
Blue Cross and Blue Shield of Massachusetts, Inc.7100%100%100%no change0
HealthPartners, Inc.70%none list it100%no change0
Johns Hopkins Healthcare LLC7100%100%100%no change0
Network Health, Inc.7100%100%100%no change0
Singh Holdings LLC7100%100%100%no change0
Baystate Health, Inc.6100%100%100%no change0
Blue Cross Blue Shield of Arizona6100%100%100%no change0
Blue Cross Blue Shield of Kansas6100%100%100%no change0
BlueCross BlueShield of South Carolina (BCBSSC)6100%100%100%no change0
CareSource633%100%100%no change0
Clever Care Health Plan, Inc.6100%100%100%no change0
Eternal Health of Delaware, Inc.6100%100%100%no change0
Hawaii Medical Service Association6100%100%100%no change0

Source: CMS CY2027 landscape file (states and parent organizations), as of September 30, 2026. Publisher page

Source: CMS 2027 Part D formulary file (basic drugs and plan information), as of October 8, 2026. Publisher page

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Near it by Part D spending

About this data

A plan here is one Part D plan as the CMS formulary files list it: contract, plan, and segment. That covers Medicare Advantage plans with drug coverage and stand-alone drug plans. A plan lists a drug when its formulary has a row for any RxNorm product of that name. When it has several, the row with the lowest tier is the one counted, and restricted means that row has prior authorization, step therapy, or a quantity limit.

A plan with no row for the drug counts as not listing it. That can be a product the file codes another way, so read a low count as a lookup result, not a coverage decision. A state counts every plan the CMS landscape file offers there. Parent organizations are named as CMS names them. The drug list is the top 200 by total Part D spending.

Source: CMS 2027 Part D formulary file (basic drugs and plan information), as of October 8, 2026. Publisher page

Source: CMS CY2027 landscape file (states and parent organizations), as of September 30, 2026. Publisher page

Source: CMS Medicare Part D Spending by Drug, 2024 data, as of June 25, 2026. Publisher page

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