Even presuming consistency rules for all an employer’s employee-benefit plans (of those that seek to meet a tax law condition that refers to Internal Revenue Code of 1986 § 414(q)):
The Treasury department’s temporary rule (adopted February 19, 1988, and last amended June 27, 1994) interprets § 414(q) as it was in effect for 1996 and earlier years.
Under that rule, § 414(q)’s definition for a highly-compensated employee applies if another Internal Revenue Code section refers to § 414(q).
26 C.F.R. § 1.414(q)-1T https://www.ecfr.gov/current/title-26/chapter-I/subchapter-A/part-1/subject-group-ECFR686e4ad80b3ad70/section-1.414(q)-1T
About health, other welfare, and fringe-benefit plans, that § 414(q) temporary rule lists sections 89, 106, 117(d), 125, 129, 132, 274, 423(b), 501(c)(17)-(18), and 505.
Section 223—Health Savings Accounts states no reference to § 414(q).
Does some coverage or nondiscrimination rule apply intermediately or indirectly?