Medicare Advantage organization · contract H2225
Commonwealth Care Alliance Massachusetts
Legal entity: COMMONWEALTH CARE ALLIANCE, INC.
Parent: CareSource
What is Commonwealth Care Alliance Massachusetts?
Per the CMS Medicare Advantage Plan Directory, Commonwealth Care Alliance Massachusetts is a Local CCP offering HMO/HMOPOS plans under CMS contract H2225 , CMS region Boston , part of CareSource. CMS-reported enrollment: 18,762.
This is a directory of organizations — it does NOT show plan premiums, benefits, copays, or star ratings. To compare actual Medicare Advantage plans in your area, use medicare.gov/plan-compare. Free help: call your State Health Insurance Assistance Program (SHIP) or 1-800-MEDICARE.
What the enrollment figure means
The enrollment of 18,762 is the number as submitted by Commonwealth Care Alliance Massachusetts to CMS and published in the CMS MA Plan Directory. It is a CMS-directory figure — not a verified headcount of current active beneficiaries, not a quality indicator, and not a factor in star ratings. Larger enrollment does not mean better plans.
How to compare Medicare Advantage organizations
This directory lists organizations by CMS contract. To compare plans by premiums, star ratings, benefits, and availability in your county, use the official Medicare Plan Finder. Key dimensions to compare: organization type, plan type (MA-PD, PFFS, PACE), CMS region, and enrollment — all shown on this page. Star ratings (1–5) are on the star ratings page for Commonwealth Care Alliance Massachusetts or browse all star ratings.
CMS Directory Contact
This is the administrative directory contact as submitted to CMS — not necessarily a consumer enrollment help line.
- Name
- Member Services
- Phone
- 1-866-420-9332
- memberservices@commonwealthcare.org
- Address
- 2 Avenue de Lafayette, 5th Floor, Boston, MA, 02111
- Last updated
- 01/16/2026
Frequently asked questions
What type of organization is Commonwealth Care Alliance Massachusetts?
Commonwealth Care Alliance Massachusetts (CMS contract H2225) is classified by CMS as a Local CCP offering HMO/HMOPOS plans. It is part of CareSource. Tax status: Not-for-Profit/Non-Profit. This classification is verbatim from the CMS Medicare Advantage Plan Directory.
How many people are enrolled in Commonwealth Care Alliance Massachusetts?
The CMS Medicare Advantage Plan Directory reports enrollment of 18,762 for Commonwealth Care Alliance Massachusetts (contract H2225). This is the enrollment as submitted to CMS by the organization. It is a directory figure — not a count of current active members or a quality indicator.
Which CMS region does Commonwealth Care Alliance Massachusetts operate in?
The CMS Medicare Advantage Plan Directory lists Commonwealth Care Alliance Massachusetts (contract H2225) under CMS region Boston. CMS regions are administrative divisions used for oversight — they do not directly correspond to the geographic areas where individual plans are available. To find plans available in your county, use medicare.gov/plan-compare.
Does Commonwealth Care Alliance Massachusetts show premiums, copays, or coverage details here?
No. This page is a directory of the organization as listed in the CMS Medicare Advantage Plan Directory — it shows who the organization is, its type, parent, and enrollment. It does NOT show individual plan premiums, deductibles, drug formularies, copays, or star ratings. To compare actual Medicare Advantage plans, premiums, and coverage available in your area, use the official Medicare Plan Finder at medicare.gov/plan-compare. For free, unbiased help, contact your State Health Insurance Assistance Program (SHIP) or call 1-800-MEDICARE (1-800-633-4227).
How do I contact Commonwealth Care Alliance Massachusetts?
The CMS MA Plan Directory lists Member Services as the directory contact for Commonwealth Care Alliance Massachusetts (contract H2225): 1-866-420-9332, memberservices@commonwealthcare.org. This is the administrative CMS-directory contact, not necessarily a consumer help line. For Medicare enrollment assistance, call 1-800-MEDICARE or contact your SHIP.
What to do next
- Compare plans and enroll: medicare.gov/plan-compare — the official Medicare Plan Finder. Compare premiums, benefits, drug coverage, and star ratings for plans available in your ZIP code.
- Free unbiased help: contact your State Health Insurance Assistance Program (SHIP) — a free counseling service — or call 1-800-MEDICARE (1-800-633-4227), 24 hours a day, 7 days a week.
- Official CMS directory: CMS MA Plan Directory — the source of this data (monthly release).
RECORDED — all figures on this page are verbatim from the CMS Medicare Advantage Plan Directory: organization name, type, plan type, parent, region, enrollment, and contact. Accuracy depends on carrier submissions to CMS, not Atlas Commons modeling.
This directory entry informs — it does not rank, recommend, or show plan benefits or premiums. Data generated June 24, 2026.
Machine-readable: JSON-LD · Markdown · Source: CMS Medicare Advantage