FedRAMP and FISMA are related, but not interchangeable. Both sit on the same NIST 800-53 High baseline — but FISMA is the umbrella law that says every federal system needs an Authority to Operate (ATO), while FedRAMP is the cloud-specific program built on top of it. A FedRAMP High ATO includes everything FISMA High covers, then adds cloud-specific controls, an independent third-party (3PAO) assessment, and ongoing continuous monitoring. A FISMA-High ATO on its own doesn’t come with any of that.
So when two vendors both say “High” on their security page, this is the difference worth digging into.
What FISMA actually covers
The Federal Information Security Modernization Act is the law underneath all federal system security. It tells agencies to categorize their systems under FIPS 199 prescribed categories (Low, Moderate, or High), apply the matching NIST 800-53 control set, assess those controls, and issue an ATO before anything goes live. “FISMA High” just means a system was categorized at High impact and authorized against the NIST 800-53 High baseline through an agency’s own internal process. This applies to every federal system — on-premise, hybrid, or cloud, it doesn’t matter.
What FedRAMP adds on top
FedRAMP takes that same FISMA foundation and standardizes it specifically for cloud. On top of the NIST High baseline, a FedRAMP High assessment adds cloud-specific controls (things like multi-tenancy, boundary definition, and shared responsibility with the infrastructure provider), an assessment done by an accredited third party (3PAO) instead of a vendor just self-attesting, standardized paperwork (an SSP built on FedRAMP’s own templates), and mandatory continuous monitoring with a set reporting schedule. The end result is a package built to be reused across agencies — which is really the whole point of FedRAMP existing in the first place.
Why they both get to say “High”
Because they’re both graded on the same scale: FIPS 199 categorization feeding into the NIST 800-53 High baseline. The impact level just describes how sensitive the data is — it doesn’t tell you which program actually did the testing. That shared label is exactly why two “High” claims can look identical on paper while meaning very different things underneath.
What this actually means if you’re buying an EHR (or telehealth platform)
Picture two cloud EHR vendors. Vendor A says “FISMA High ATO.” Vendor B says “FedRAMP High ATO.” Vendor A went through one agency’s internal process — that’s real, but it may not include cloud-specific controls, an independent 3PAO review, or FedRAMP-grade continuous monitoring. If a second agency wants to use that system, they’re largely starting from scratch. Vendor B was assessed against the full FedRAMP High baseline — cloud controls, independent assessment, ongoing monitoring, all of it — which gives a second agency something they can actually lean on instead of re-assessing everything themselves. For cloud systems, FedRAMP High is the more complete credential, and per the FedRAMP Authorization Act of 2022, it’s also the framework the government actually requires for cloud services touching federal data.
The High label isn’t the whole story — what matters is what got tested
Here’s a nuance worth knowing: the strength of an authorization comes from what was actually assessed, not just which name is on the certificate. An agency ATO that was explicitly assessed against the full FedRAMP High baseline — which is exactly how VSee’s ATO from the HHS Assistant Secretary for Preparedness and Response (ASPR) works — carries all the FedRAMP-grade substance, even though it came through an agency instead of a published PMO package. What actually matters is whether the application boundary met the FedRAMP High control set, cloud controls and monitoring included.
More on this: How the application boundary relates to cloud hosting →
Three questions to ask potential vendors
If you’re comparing vendors, these three questions do most of the work:
- Was the system assessed against the FedRAMP High baseline, or only against NIST High through an internal agency process?
- Was that assessment done independently by a 3PAO?
- And is continuous monitoring actually in place, with regular reporting?
Get answers to those in writing, and “High vs. High” stops being confusing.
FAQs
Is FISMA the same as FedRAMP?
No. FISMA is the law requiring all federal systems to be authorized; FedRAMP is the standardized, cloud-specific program built on FISMA’s foundation for cloud services.
Is a FedRAMP EHR required for government agencies?
Yes, if the EHR is cloud-based and handles federal data. FISMA, the FedRAMP Authorization Act of 2022, and OMB M-24-15 together make FedRAMP mandatory for cloud services processing federal information.
Does FedRAMP High satisfy FISMA High requirements?
Yes. FedRAMP High covers the complete NIST SP 800-53 High security baseline required by FISMA, while adding essential cloud-specific controls, independent third-party (3PAO) auditing, and mandatory continuous monitoring.
Does FISMA High satisfy FedRAMP High requirements?
No. FISMA High alone doesn’t include the independent third-party assessment and continuous monitoring that FedRAMP High requires. A system needs to be assessed against the full FedRAMP High baseline to meet that bar.
Can a cloud service be FISMA High certified without FedRAMP authorization?
Technically yes, but it creates compliance risk. An individual agency can issue an internal FISMA High authorization without FedRAMP oversight—a common practice for legacy, on-premise infrastructure. However, federal mandates explicitly require FedRAMP authorization for cloud services handling federal data, and agency-specific FISMA authorizations rarely transfer to other federal buyers.
Which compliance standard provides greater security assurance for federal EHR systems?
FedRAMP High. For cloud-based Electronic Health Record (EHR) platforms, FedRAMP High offers the most rigorous and transferable security standard. It provides the core FISMA protection along with independent verification, cloud-native security controls, and ongoing threat monitoring—delivering the comprehensive assurance required for sensitive healthcare data.
What is a FedRAMP EHR?
A FedRAMP EHR is a cloud-based electronic health record (EHR) system that has been authorized under FedRAMP — the government’s standardized cloud-security program — to handle federal health data, via an Authority to Operate (ATO) at a FedRAMP impact level (Moderate or High).
What’s the difference between an EHR and an EMR — and is there a FedRAMP EMR?
The terms are used interchangeably; for FedRAMP there’s no distinction. “FedRAMP EMR” and “FedRAMP EHR” both mean a cloud record system authorized to handle federal health data.
What does “FedRAMP High” mean?
FedRAMP High is the most stringent impact level (400+ NIST 800-53 controls), reserved for the government’s most sensitive unclassified data, including health information used in federal programs.
What is an Authority to Operate (ATO)?
An ATO is the formal approval a federal agency issues before a system goes live, certifying its security risk has been assessed and accepted. A FedRAMP High ATO means it was assessed against the FedRAMP High baseline.
Which EHRs have a FedRAMP High ATO?
Very few. VSee holds a FedRAMP High ATO issued by HHS ASPR; most others are Moderate, In Process, single-agency, or not FedRAMP. See the comparison →
How do I verify a vendor’s FedRAMP status?
Check the FedRAMP Marketplace; if a vendor isn’t listed, request its ATO letter, impact level, authorizing agency, and System Security Plan — and confirm it’s the platform’s own ATO, not just its hosting.
Where VSee stands
VSee holds a FedRAMP High ATO issued by HHS ASPR — an agency authorization assessed against the FedRAMP High baseline, the government’s most stringent tier. See the ATO details and request the security package →
Sources
- FedRAMP vs. FISMA explainer: https://www.schellman.com/blog/federal-compliance/fedramp-vs-fisma
- NIST SP 800-53: https://csrc.nist.gov/pubs/sp/800/53/r5/upd1/final
- FedRAMP program basics: https://www.fedramp.gov/program-basics/
