VIAL TRUST COMPARISON

Function Health vs Marek Diagnostics

Biggest Differences

Geographic reach
Function Health is available in all 50 states compared to Marek Diagnostics's 40, which may decide the question before any other signal if you're outside Marek Diagnostics's footprint.

Function Health

Lab / Diagnostic

79/ 100

Meets baseline compliance standards.

Moderate Confidence· 5/9

Full report →

Marek Diagnostics

Lab / Diagnostic

75/ 100

Meets baseline compliance standards.

Moderate Confidence· 5/9

Full report →

Generated by Vial · May 14, 2026

Signal-by-Signal

Compliance Comparison

Signal	Function HealthA	Marek Diagnostics	Edge
NPI Registration	✗ Not Found	✗ Not Found	Same
FDA Enforcement	✓ No Actions Found	✓ No Actions Found	Same
PCAB Accreditation	✗ Not Accredited	✗ Not Accredited	Same
LegitScript	✗ Not Certified	✗ Not Certified	Same
Physician Credentials	✓ Listed	✓ Listed	Same
Vial Trust Score	79/100	75/100	Function

Vial Analysis

Our Assessment

Function Health

Best for

Main strength

↑ No active FDA enforcement actions on record

Main caution

⚠ NPI registration not confirmed in federal registry

Marek Diagnostics

Best for

Patients wanting comprehensive care

Main strength

↑ No active FDA enforcement actions on record

Main caution

⚠ NPI registration not confirmed in federal registry

Both providers show similar public records. Your choice may come down to treatment type, state availability, and pricing.

Comparison reflects publicly disclosed federal and state records only. Vial does not audit clinical quality or patient outcomes.

Provider A

Function Health

DeliveryTelehealth Only

Price TierMid

HQSan Francisco, CA

Services: Metabolic Health, Longevity Protocols, Cognitive Performance

Profile →Report →

Provider B

Marek Diagnostics

DeliveryTelehealth Only

Price TierPremium

HQScottsdale, AZ

Services: TRT, HRT, Metabolic Health +1

Profile →Report →

Want to run a full compliance report on either provider?

Function Health Report →|Marek Diagnostics Report →

Other comparisons featuring these providers

Comparison based on public federal and state records including NPI Registry, FDA enforcement database, and PCAB accreditation directory. Updated weekly. Not a medical endorsement.