Medicare drug coverage

Potassium chloride: 2027 Medicare Part D coverage

5,495 of 5,495 Part D plans (100%) list potassium chloride on their 2027 formulary, the plan's list of covered drugs (the same share as 2026). 1% of those require prior authorization, step therapy, or a quantity limit. Plan counts include both Medicare Advantage plans with drug coverage (5,172 MA-PD) and stand-alone drug plans (323 PDP).

License: a US government work, in the public domain (Public Domain Mark 1.0).

Data only, not plan advice. Confirm on Medicare.gov Plan Finder or 1-800-MEDICARE.

For pharmacies and agencies: check a whole drug list against 2027 formularies.

Upload your patient list or your book of clients and Rivvi checks each drug against the CMS 2027 formulary files, plan by plan, so you see tier changes and new limits before the next refill or open enrollment. Free to start. HIPAA BAA included.

For pharmacies For agencies

2027 compared with 2026

Potassium chloride is number 144 by total Medicare Part D spending in 2024 ($291 million). Plans that list it most often put it on tier 2 (a tier is the cost level a plan puts a drug on; a lower tier usually costs less). Counts use 47 RxNorm products for this name.

Potassium chloride Part D coverage, 2026 and 2027
Measure	2026	2027	Change
Part D plans in the file	5,518	5,495	-23
Plans that list it	5,517 (>99%)	5,495 (100%)	no change
Prior authorization (of plans that list it)	48 (1%)	46 (1%)	no change
Step therapy (of plans that list it)	0 (0%)	0 (0%)	no change
Quantity limit (of plans that list it)	0 (0%)	0 (0%)	no change
Any of the three (of plans that list it)	48 (1%)	46 (1%)	no change
Not listed or restricted (of all plans)	49 (1%)	46 (1%)	no change

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

Every 2027 stand-alone drug plan

Each stand-alone Part D plan (PDP) with potassium chloride's 2027 tier and limits. CMS files a PDP once per region, so one plan name can have several plan IDs; the row shows the tier and limits most of them use. Medicare Advantage drug plans are local: pick a state for its plan-by-plan table.

Potassium chloride on every 2027 stand-alone Part D plan
Plan (PDP)	Plan IDs	2027 tier	2027 limits
AARP Medicare Rx Preferred from UHC (PDP)	39	Tier 2	None
AARP Medicare Rx Saver from UHC (PDP)	34	Tier 2	None
Blue Medicare Rx Enhanced (PDP)	1	Tier 2	None
Blue Medicare Rx Standard (PDP)	1	Tier 2	None
Blue MedicareRx Essentials (PDP)	1	Tier 2	None
Blue MedicareRx Plus (PDP)	1	Tier 2	None
Blue MedicareRx Premier (PDP)	1	Tier 2	None
Blue MedicareRx Value (PDP)	1	Tier 2	None
Blue MedicareRx Value Plus (PDP)	1	Tier 2	None
Blue Shield Rx Enhanced (PDP)	1	Tier 2	None
Blue Shield Rx Plus (PDP)	1	Tier 2	None
BlueMedicare Complete Rx (PDP)	1	Tier 2	None
BlueMedicare Premier Rx (PDP)	2	Tier 2	None
BlueMedicare Value Rx (PDP)	1	Tier 2	None
BlueRx Enhanced Plus (PDP)	1	Tier 2	None
BlueRx Essential (PDP)	1	Tier 2	None
HealthSpring Assurance Rx (PDP)	35	Tier 2	None
HealthSpring Extra Rx (PDP)	2	Tier 1	None
HealthSpring Extra RX (PDP)	3	Tier 1	None
Horizon Medicare Blue Rx Enhanced (PDP)	1	Tier 2	None
Horizon Medicare Blue Rx Standard (PDP)	1	Tier 2	None
Humana Basic Rx Plan (PDP)	34	Tier 2	None
Humana Premier Rx Plan (PDP)	34	Tier 2	None
Humana Value Rx Plan (PDP)	34	Tier 2	None
MedicareBlue Rx Standard (PDP)	1	Tier 2	None
Prescription Blue Premium (PDP)	1	Tier 2	None
Prescription Blue Select (PDP)	1	Tier 2	None
SilverScript Choice (PDP)	20	Tier 2	None
Wellcare Classic (PDP)	34	Tier 1	None
Wellcare Value Script (PDP)	34	Tier 1	None

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

By dosage form

The 2027 formularies list potassium chloride by dosage form. A plan can cover one form and leave off or restrict another, so each form is counted on its own, across all 5,495 plans.

Potassium chloride by dosage form, 2027
Dosage form	Plans that list it	Restricted (of listing)	Most common tier
Effervescent oral tablet	0 (0%)	none list it	none list it
Extended release oral capsule	5,444 (99%)	0 (0%)	Tier 2
Extended release oral tablet	5,495 (100%)	0 (0%)	Tier 2
Injectable solution	5,284 (96%)	31 (1%)	Tier 4
Injection	5,363 (98%)	48 (1%)	Tier 4
Oral capsule	0 (0%)	none list it	none list it
Oral solution	5,474 (>99%)	0 (0%)	Tier 4
Oral tablet	0 (0%)	none list it	none list it
Powder for oral solution	4,047 (74%)	0 (0%)	Tier 4

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

Formulary tier

Potassium chloride formulary tier, 2026 and 2027
Tier	2026 plans	2027 plans
Tier 1	1,658 (30%)	1,749 (32%)
Tier 2	3,825 (69%)	3,746 (68%)
Tier 3	34 (1%)	0 (0%)

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. 0 of them (0%) added prior authorization, step therapy, or a quantity limit for potassium chloride, and 0 stopped listing it.

Potassium chloride: plans in both 2026 and 2027
Plan by plan	Plans
Same plan ID in both years	4,380
Listed it in 2026, not in 2027	0 (0%)
Listed it in 2027, not in 2026	0 (0%)
Moved it to a higher tier	53 (1%)
Added prior authorization	0 (0%)
Added step therapy	0 (0%)
Added a quantity limit	0 (0%)
Added at least one of the three	0 (0%)
Removed at least one of the three	0 (0%)
Plan IDs new in 2027	1,115
2026 plan IDs not in the 2027 file	1,138

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 potassium chloride off the formulary or list it with prior authorization, step therapy, or a quantity limit. Nevada ranks first at 10%, with 10% of its plans using prior authorization or step therapy; 48 states tie for the lowest, 0%. States at the same share are marked Tied and share a rank.

States from most to least restrictive for Potassium chloride, 2027
Rank	State	2027 plans	Not listed or restricted	Prior auth or step therapy	Change from 2026
1	Nevada	100	10%	10%	+3 points
2	Texas	412	3%	3%	no change
3	Florida	549	1%	1%	no change
Tied 4	Alaska	9	0%	0%	no change
Tied 4	Alabama	115	0%	0%	no change
Tied 4	Arkansas	86	0%	0%	no change
Tied 4	Arizona	148	0%	0%	no change
Tied 4	California	397	0%	0%	no change
Tied 4	Colorado	106	0%	0%	no change
Tied 4	Connecticut	54	0%	0%	no change
Tied 4	District of Columbia	21	0%	0%	no change
Tied 4	Delaware	43	0%	0%	no change
Tied 4	Georgia	151	0%	0%	no change
Tied 4	Hawaii	50	0%	0%	no change
Tied 4	Iowa	64	0%	0%	no change
Tied 4	Idaho	45	0%	0%	no change
Tied 4	Illinois	133	0%	0%	no change
Tied 4	Indiana	140	0%	0%	no change
Tied 4	Kansas	84	0%	0%	no change
Tied 4	Kentucky	123	0%	0%	no change
Tied 4	Louisiana	126	0%	0%	no change
Tied 4	Massachusetts	92	0%	0%	no change
Tied 4	Maryland	49	0%	0%	no change
Tied 4	Maine	52	0%	0%	no change
Tied 4	Michigan	183	0%	0%	no change
Tied 4	Minnesota	63	0%	0%	no change
Tied 4	Missouri	171	0%	0%	no change
Tied 4	Mississippi	105	0%	0%	no change
Tied 4	Montana	27	0%	0%	no change
Tied 4	North Carolina	177	0%	0%	no change
Tied 4	North Dakota	26	0%	0%	no change
Tied 4	Nebraska	51	0%	0%	no change
Tied 4	New Hampshire	25	0%	0%	no change
Tied 4	New Jersey	74	0%	0%	no change
Tied 4	New Mexico	68	0%	0%	no change
Tied 4	New York	215	0%	0%	no change
Tied 4	Ohio	173	0%	0%	no change
Tied 4	Oklahoma	81	0%	0%	no change
Tied 4	Oregon	92	0%	0%	no change
Tied 4	Pennsylvania	324	0%	0%	no change
Tied 4	Rhode Island	29	0%	0%	no change
Tied 4	South Carolina	91	0%	0%	no change
Tied 4	South Dakota	30	0%	0%	no change
Tied 4	Tennessee	157	0%	0%	no change
Tied 4	Utah	53	0%	0%	no change
Tied 4	Virginia	145	0%	0%	no change
Tied 4	Vermont	14	0%	0%	no change
Tied 4	Washington	114	0%	0%	no change
Tied 4	Wisconsin	97	0%	0%	-1 point
Tied 4	West Virginia	70	0%	0%	no change
Tied 4	Wyoming	13	0%	0%	no change

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 0% of them leave potassium chloride off or restrict it.

Potassium chloride coverage by parent organization, 2027
Parent organization	2027 plans ↓	List it	Restrict it (of listing)	Not listed or restricted	Change from 2026	Plans that added a restriction
Humana Inc.	884	100%	0%	0%	no change	0
UnitedHealth Group, Inc.	850	100%	0%	0%	no change	0
Devoted Health, Inc.	728	100%	0%	0%	no change	0
CVS Health Corporation	633	100%	0%	0%	no change	0
Elevance Health, Inc.	294	100%	0%	0%	no change	0
Centene Corporation	268	100%	0%	0%	no change	0
Health Care Service Corporation	231	100%	0%	0%	no change	0
Kaiser Foundation Health Plan, Inc.	112	100%	0%	0%	no change	0
Highmark Health	98	100%	0%	0%	no change	0
SCAN Group	85	100%	0%	0%	no change	0
Alignment Healthcare USA, LLC	77	100%	0%	0%	no change	0
Guidewell Mutual Holding Corporation	55	100%	31%	31%	-10 points	0
Blue Cross Blue Shield of Michigan Mutual Ins. Co.	43	100%	0%	0%	no change	0
Molina Healthcare, Inc.	43	100%	0%	0%	no change	0
Corewell Health	40	100%	0%	0%	no change	0
Zing Health Consolidator, Inc	36	100%	0%	0%	no change	0
CAPITAL BLUE CROSS	35	100%	0%	0%	no change	0
Medica Holding Company	31	100%	0%	0%	no change	0
UPMC Health System	30	100%	0%	0%	no change	0
Universal Health Services, Inc.	29	100%	100%	100%	no change	0
MHH Healthcare, L.P.	26	100%	0%	0%	no change	0
Independence Health Group, Inc.	25	100%	0%	0%	no change	0
Point32Health, Inc.	23	100%	0%	0%	no change	0
BlueCross BlueShield of Tennessee	22	100%	0%	0%	no change	0
California Physicians' Service	22	100%	0%	0%	no change	0

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

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

Try it on your own data today.

Free to start. Most teams are using it the same day.

Get started for free See pricing