U.S. CMS MARS-E v2.0 — Minimum Acceptable Risk Standards for Exchanges

Why it Matters

MARS-E v2.0 sets foundational security and compliance standards toprotect sensitive health data and ensure regulatory adherence inhealth insurance exchanges.

Key benefits include:

• Strengthen cybersecurity governance

Establishes clearrequirements and oversight for managing risks and protecting healthdata within exchange environments.

• Enable stronger regulatory compliance

Aligns securitypractices with federal mandates, supporting organizations in meetingCMS and related regulatory requirements.

• Enhance audit readiness

Standardizesdocumentation and reporting, making it easier for organizations todemonstrate compliance during internal and external audits.

• Improve data protection practices

Implementscontrols that safeguard personally identifiable and protected healthinformation against unauthorized access and misuse.

• Promote operational resilience

Supportsproactive incident response and risk management to minimizedisruptions and sustain reliable access to critical healthcareservices.

How it Works

The CMS MARS-E v2.0 framework structures its requirements into a setof control families aligned with NIST Special Publications,particularly NIST SP 800-53. These control families address domainssuch as access control, risk assessment, incident response, andsystem integrity, tailored for healthcare exchanges handlingsensitive data. Each control family details specific security andprivacy safeguards, along with minimum baseline requirements, toensure that federal and state health exchanges maintain acceptablelevels of risk.

In practice, organizations implement CMS MARS-E by mapping thesesecurity controls to their own environments, conducting formal riskassessments, and integrating the controls into daily operations.Compliance teams review their processes against MARS-E standards,document evidence of control effectiveness, and regularly monitorsystem configurations to meet ongoing governance and regulatoryrequirements. Audit activities and periodic reviews help ensuresustained alignment with both CMS and broader healthcare complianceobligations.

With SmartSuite, organizations can operationalize CMS MARS-E throughfeatures such as pre-built control libraries, centralized policygovernance, and risk registers. SmartSuite enables continuouscompliance tracking, structured evidence collection, and remediationworkflows, supporting audit readiness. Reporting dashboards provideorganizations with visibility into compliance status and help monitorsecurity practices across the enterprise.

Key Elements

• Security Control Families

Organizesindividual safeguards and technical requirements into a set ofdistinct control groupings.

• Access Management and Authentication

Specifiesrequirements for user identification, authentication mechanisms, andlogical access restrictions.

• Risk and Compliance Processes

Describessystematic procedures for risk assessment, compliance tracking, anddocumentation review.

• Incident Response Structure

Defines protocolsfor coordinating, reporting, and addressing information securityincidents.

• Data Protection and Privacy

Establishesguidelines for safeguarding sensitive information and ensuringprivacy throughout handling and storage.

• Governance and Policy Oversight

Outlines roles,responsibilities, and accountability for managing security policiesand continual program oversight.

Framework Scope

U.S. CMS MARS-E v2.0 is used by state and federal health insuranceexchanges, contractors, and related entities responsible for handlingfederal health data. The framework governs information systems andenvironments processing sensitive healthcare information, and iscommonly implemented when meeting federal regulatory obligations,improving data protection, and supporting compliance oversight andoperational assurance programs.

Framework Objectives

U.S. CMS MARS-E v2.0 defines cybersecurity and compliance objectivesfor health insurance exchanges managing federal data.

Safeguard sensitive health information through robust securitycontrols and data protection

Strengthen governance and oversight for regulatory compliance andrisk management

Enhance operational resilience against cybersecurity threats andvulnerabilities

Support adherence to federal standards and regulatory requirementsfor health exchanges

Improve audit readiness by maintaining comprehensive compliancedocumentation

Promote continuous risk assessment and effective incident responsecapabilities CMS MARS-E v2.0 aligns closely with NIST SP 800-53 andthe NIST Cybersecurity Framework, providing security and privacycontrols tailored for U.S. healthcare exchanges. Organizationsimplement MARS-E to meet federal regulatory compliance requirementsfor handling protected health information, particularly to supportCMS, HIPAA, and FedRAMP obligations in health IT environments.

Framework in Context

CMS MARS-E v2.0aligns closely with NIST SP 800-53 and the NIST CybersecurityFramework, providing security and privacy controls tailored for U.S.healthcare exchanges. Organizations implement MARS-E to meet federalregulatory compliance requirements for handling protected healthinformation, particularly to support CMS, HIPAA, and FedRAMPobligations in health IT environments.

Common Framework Mappings

Organizations map CMS MARS-E v2.0 to other well-known securityframeworks to streamline compliance processes, ensure robust riskmanagement, and facilitate alignment with overlapping federal,healthcare, and industry standards.

Mapped frameworks include:

CIS Critical Security Controls

FedRAMP Security Assessment Framework

HIPAA Security Rule

HITRUST CSF

ISO/IEC 27001

NIST Cybersecurity Framework (CSF)

NIST SP 800-53

SOC 2 Compliance / Assurance Standard

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