The Employees' State Insurance Act, 1948, provides social security to employees in India in the form of cash benefits, medical benefits, pensions for dependents, and more. However, not all the benefits listed in the options are covered by this act. Let's analyze each option:

1. Sickness Benefit: This is provided under the ESI Act to insured employees during periods of certified sickness for a maximum of 91 days in any two consecutive benefit periods. This option is correct according to the ESI Act.
2. Maternity Benefit: Female insured members can also avail of maternity benefits as per the Act. This provision supports them during their maternity period. This option is correct according to the ESI Act.
3. Disablement Benefit: The Act provides for disablement benefits to employees who suffer from temporary or permanent physical disablement due to an employment injury. This ensures financial stability to affected individuals. This option is correct according to the ESI Act.
4. Health Benefit: While the ESI scheme provides various medical benefits, there is no specific provision termed as "Health Benefit" in the list of benefits under the ESI Act, 1948. Therefore, this option is not covered as per the Act.

Conclusion: Based on the examination of the given options, Health benefit is not explicitly mentioned as a provided benefit under the Employees' State Insurance Act, 1948. Hence, the correct answer is Health benefit.