YES. See the screen shot of the Covered CA online application below and the definition of MAGI Income (iii) where Social Security Benefits §86 except SSI get added back in. Please first see the sections on MAGI for health care subsidies and What Part of Social Security gets added back in, so that we don’t have to repeat the same information.
Interpreting law is outside the scope of my license. I’m just pointing it out to you.
26 US Code 86
(a) In general
(1) In general
Except as provided in paragraph (2), gross income for the taxable year of any taxpayer described in subsection (b) (notwithstanding section 207 of the Social Security Act) includes social security benefits in an amount equal to the lesser of—
(A)one-half of the social security benefits received during the taxable year, or
(B)one-half of the excess described in subsection (b)(1).