here are the qualifications :
Qualifying for an HSA Contribution
To be an eligible individual and qualify for an HSA contribution, you must meet the following requirements.
• You are covered under a high deductible health plan (HDHP), described later, on the first day of the month.
• You have no other health coverage except what is permitted under Other health coverage, later.
• You aren’t enrolled in Medicare.
see page 4 specifically
https://www.irs.gov/pub/irs-pdf/p969.pdf
High deductible health plan (HDHP). An HDHP has:
• A higher annual deductible than typical health plans,
and
• A maximum limit on the sum of the annual deductible and out-of-pocket medical expenses that you must pay for covered expenses. Out-of-pocket expenses include copayments and other amounts, but don’t include premiums
