AI summary
Diagnosis Related Groups classify hospital inpatient stays into clinically related groups expected to use similar resources. CMS uses Medicare Severity DRGs in the inpatient prospective payment system, with classifications updated for each fiscal year. A DRG supports payment grouping; it is not itself a diagnosis, coverage promise, or statement about a hospital's quality.
Each receipt below describes its exact retained artifact or live source. Dates and digests never cross artifact boundaries.
Evidence publisher: Centers for Medicare & Medicaid Services (CMS). Source date: 2026-07-20.
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Scope and material limitation
This definition covers CMS MS-DRGs for Medicare inpatient payment. Other payers or jurisdictions may use related systems with different versions and rules.
Dated source facts
Source-snapshot manifest receipt
This receipt attests the source snapshot manifest, not any individual fact.
The answer-series chain record is unsigned. It does not authenticate a person, organization, eligibility state, or individual fact.
2180c40ff5f1b596698ec845db03d666c2f2d47077a8209f344dc4d74c26a465a64ba39f0764e3fbf906e686c29634926d1f43ab77f3fdce1cdb2e407987911093edbfa9e96f22a19c6822300cd64f5c3ddec00d3a669b55a0e15953400f7d970unsignedPrimary-source chain
Limitation: MS-DRG assignment is specific to Medicare inpatient payment rules and the applicable fiscal-year release; it is not a clinical diagnosis or coverage decision.
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Methodology and limitations
Frequently asked questions
What’s on file, by the numbers
Platform snapshot · 2026-08-30
Integrated, with-data, and fresh-observation counts are separate. No platform-wide source-completeness count is published. Completeness is source-specific and must be evaluated against the named source's expected scope. State coverage is a separate jurisdiction measure.
Source authority is record-specific
Use the issuer named on the record.
Fonteum spans federal, state, and global public publishers. A source page or returned record identifies its issuer and dataset where that metadata is available. A platform registry count does not assign every page to one authority or establish loaded, fresh, or complete coverage.
Reproducible by design
Inspect the evidence each published figure actually supplies.
Source and date
Research pages expose the named public file and observation date where those fields are available. Source-file SHA-256 coverage is separate; facts do not currently link deterministically to signatures.
Available derivation
Studies with a retained release and committed derivation link the SQL or method used. Other studies state the evidence and reproduction limits they actually have.
Daily observations
Dated table row-count observations can detect local drift. They do not imply that an upstream publisher released or Fonteum ingested new data that day.
Named medical review
Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.