How to Find Your MassHealth Group Number on Your Card

Your MassHealth group number is a 9-digit identifier located on the front of your MassHealth member ID card.

Where to Look

• Position: Upper right corner, directly below your last name and cardholder number.
• Format: Begins with the letter “G” or the number “1” followed by 8 digits (e.g., G12345678 or 123456789).

Why It Matters

• Identifies your specific enrollment group/plan type (e.g., Standard, CommonHealth, Family Assistance, CarePlus).
• Used by providers for eligibility verification and billing.
• Different from your Member ID (Medicaid ID) — both may be requested.

If You Can’t Find It

• Call MassHealth Customer Service: 1-800-841-2900 (TTY: 1-800-497-4648).
• Log into your My Account portal at masshealth.gov.
• Ask your provider’s billing office—they can look it up with your name/DOB.