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CMS Requires COVID-19 Vaccine for Health Care Workers at all Facilities Participating in Medicare and Medicaid
Friday, November 5, 2021

On Nov. 4, 2021, the Centers for Medicare and Medicaid (CMS) released a new Interim Final Rule (IFR) regarding staff vaccination at facilities that participate in the Medicare and Medicaid programs. The IFR requires covered employers to ensure that staff receive their first dose no later than Dec. 5, 2021 and achieve full vaccination no later than Jan. 4, 2022.

The vaccine rule that was also released on Nov. 4, 2021 by the Occupational Safety and Health Administration (OSHA) does not apply to employees of health care entities who are covered under the CMS IFR. However, employees of health care providers who are not subject to the CMS IFR may be subject to the OSHA vaccine rule if the facility has more than 100 employees. For more information on the OSHA vaccine rule, please click here.

Justification for the Rule

CMS cited a number of reasons for the IFR, including the risk unvaccinated staff pose to patients, reports of individuals foregoing health care due to concerns of contracting COVID-19 from health facility staff, disrupted health care operations due to infected staff, and low vaccination rates among health care staff.

Scope of Coverage

The requirements of the IFR apply to health care facilities that participate in Medicare and Medicaid and that are subject to Conditions or Requirements of Participation, including but not limited to:

  • Ambulatory surgical centers;

  • Hospices;

  • Hospitals, such as acute care hospitals, psychiatric hospitals, hospital swing beds, long-term care hospitals, and children’s hospitals;

  • Long-term care facilities;

  • Home health agencies;

  • Comprehensive outpatient rehabilitation facilities;

  • Critical access hospitals;

  • Home infusion therapy suppliers; and

  • Rural health clinics/federally qualified health centers.

While the IFR does not directly apply to physician offices, which are not regulated by CMS Conditions or Requirements of Participation, physicians may nevertheless be required to vaccinate as a result of their relationships with other health care entities. For example, the IFR requires hospitals to implement policies and procedures to ensure “individuals who provide care, treatment, or other services under contract or by other arrangement” are fully vaccinated.

Covered Personnel

The IFR requires vaccinations for staff who routinely perform care for patients and clients inside and outside of the facility, such as home health, home infusion therapy, hospice, and therapy staff. CMS’s vaccination requirement also extends to all staff who interact with other staff, patients, residents, or clients, at any location, and not just those who enter facilities. However, staff who provide services 100% remotely—that is, staff who never come into contact with other staff, patients, residents, or clients—are not subject to the IFR vaccination requirements. Additionally, providers and suppliers are not required to ensure IFR vaccination compliance of one-off vendors, volunteers, or professionals, such as (a) those who provide infrequent ad hoc non-health care services (e.g. annual elevator inspectors), (b) those who perform exclusively off-site services (e.g. accounting services), or (c) delivery and repair personnel.

Definition of Full Vaccination

CMS considers “full vaccination” as 14 days after receipt of either a single-dose vaccine (such as the Johnson & Johnson vaccine) or 14 days after the second dose of a two-dose primary vaccination series (such as the Pfizer or Moderna vaccines). At this time, CMS is not requiring the additional (third) dose of mRNA vaccine for moderately/severely immunosuppressed persons or the “booster dose” in order for staff to be considered “fully vaccinated.” Additionally, CMS considers individuals receiving heterologous vaccines—doses of different vaccines—as satisfying the “fully vaccinated” definition so long as they have received any combination of two doses. In order to gauge compliance, CMS is requiring that providers and suppliers track and securely document the vaccination status of each staff member as well as vaccine exemption requests and outcome. The IFR does not specify that weekly testing, masking, and social distancing are an alternative to vaccination, meaning employers must ensure all employees are either (1) fully vaccinated or (2) exempted under a permissible exemption.


The IFR explicitly provides that employers must continue to comply with anti-discrimination laws and civil rights protections which allow employees to request and receive exemption from vaccination due to a disability, medical condition, or sincerely held religious belief or practice. Exemptions should be provided to staff with recognized medical conditions for which a vaccine is contraindicated as a reasonable accommodation under the Americans with Disabilities Act. For exemptions for a sincerely held religious belief or practice, CMS encourages health care entities to refer to the Equal Employment Opportunity Commission’s Compliance Manual on Religious Discrimination. Despite the ability to provide an exemption, CMS states that exemptions may be provided to staff only to the extent required by law, and that requests for exemption should not be provided to those who seek solely to evade vaccination. CMS also notes at length that the Food and Drug Administration considers approved vaccines safe. Accordingly, CMS will likely be unwilling to excuse provider and supplier noncompliance due to employees refusing vaccination based on fears about safety.


Although the IFR does not identify specific penalties for non-compliance, CMS is expected to use enforcement tools such as civil money penalties, denial of payment for new admissions, or termination of the Medicare/Medicaid provider agreement. CMS will utilize State Survey Agencies to review compliance with the IFR through standard recertification surveys and complaint surveys. Noncompliance with the IFR will be addressed through established classification channels of “Immediate Jeopardy,” “Condition,” or “Standard” deficiencies.


While CMS recognizes that some states and localities have established laws to prevent mandatory compliance with vaccine mandates, CMS ultimately considers the Supremacy Clause of the United States Constitution as preempting inconsistent state and local laws as applied to Medicare- and Medicaid-certified providers and suppliers.

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