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Bill

S 847

Relates to sales and compensating sales taxes in the county of Wayne

2025 Regular Session Introduced by Pam Helming

Requires Medicaid to cover rapid whole genome sequencing for eligible ICU/high-acuity pediatric patients ≤21 with unknown etiology, to enable faster diagnosis and guide care.

SIGNED CHAP.253
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Bill Summary · S 847

Summary — S.847: An Act Relative to Rapid Whole Genome Sequencing

Status: Signed into law (Chapter 253) — effective upon passage (August 7, 2025)
Primary sponsor: Sen. John J. Cronin (Worcester & Middlesex)
Committee: Health Care Financing

Purpose / Intent

To require the Executive Office of Health and Human Services (EOHHS), in coordination with MassHealth, to ensure coverage of rapid whole genome sequencing (rWGS) for eligible Medicaid beneficiaries to enable faster genetic diagnosis and guide clinical care in acute pediatric inpatient settings.

Key provisions

  • Definition: “Rapid whole genome sequencing” (rWGS) examines the entire human genome (coding, non-coding regions and mitochondrial DNA) and must return preliminary positive results within 5 days and final results within 14 days. rWGS may be performed on the patient alone or as a duo/trio with biological parent(s).
  • Coverage requirement: Subject to CMS approval for federal matching funds, the Commonwealth shall cover rWGS as a separately payable Medicaid service when all these are met:
    1. Beneficiary is age 21 or younger.
    2. The beneficiary has a complex or acute illness of unknown etiology (not confirmed environmental exposure, toxic ingestion, infection with normal response, or trauma).
    3. The beneficiary is receiving inpatient care in an intensive care unit (ICU) or high-acuity pediatric care unit.
  • Medical necessity criteria: Coverage may be conditioned on evidence‑based medical necessity showing that:
    • The patient’s symptoms suggest a broad differential that would otherwise require multiple genetic tests;
    • Timely molecular diagnosis is necessary to guide clinical decision-making and could change management;
    • The patient meets at least one listed clinical indicators (e.g., multi‑system congenital anomalies, specific organ malformations, abnormal labs suggesting metabolic/inborn errors like hyperammonemia or severe lactic acidosis, refractory seizures, abnormal cardiac testing suggestive of channelopathies, abnormal imaging, abnormal physiologic studies, relevant family genetic history, etc.).
  • Data/privacy: Genetic data generated by rWGS are intended primarily to assist the treating team and are protected health information subject to HIPAA, HITECH and attendant regulations.
  • Implementation: EOHHS may promulgate regulations, submit Medicaid state plan amendments or waivers to CMS, or take other administrative actions necessary to implement coverage and ensure federal financial participation.

Who is affected

  • Primary: Medicaid beneficiaries age ≤21 who are in ICU/high‑acuity pediatric units with complex/acute illnesses of unknown etiology.
  • Secondary: Hospitals, pediatric intensive care units, clinical genetics and molecular diagnostic laboratories, MassHealth (administration and budget/fiscal planning), and families/caregivers seeking rapid genetic diagnosis.
  • Fiscal: May increase short‑term Medicaid expenditures for rWGS; implementation can be subject to CMS approvals for federal matching funds.

Timeline & procedural notes

  • Introduced: Jan 16, 2025 (Senate Docket No. 1247 / S.847).
  • Referred, reported and passed both branches; delivered to Governor Aug 4, 2025; signed into law Aug 7, 2025 (Chapter 253).
  • Effective immediately upon passage; EOHHS must take any needed administrative actions (rulemaking, waiver/SPAs) to operationalize coverage and federal funding.

Potential impact

Enables faster genetic diagnoses that can change acute care management for critically ill children, potentially improving outcomes and avoiding prolonged diagnostic odysseys. Implementation will require administrative work, lab capacity for rapid turnaround, and budget planning for Medicaid coverage subject to CMS approval.

Compiled from official sources — confirm details with the bill’s official record.

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