VIAL TRUST COMPARISON

Marek Diagnostics vs Walk-In Lab

Biggest Differences

Geographic reach
Marek Diagnostics is available in 40 states compared to Walk-In Lab's 0, which may decide the question before any other signal if you're outside Walk-In Lab's footprint.

Marek Diagnostics

Lab / Diagnostic

75/ 100

Meets baseline compliance standards.

Moderate Confidence· 5/9

Full report →

Walk-In Lab

Lab / Diagnostic

78/ 100

Meets baseline compliance standards.

Limited Data· 3/9

Full report →

Generated by Vial · May 14, 2026

Signal-by-Signal

Compliance Comparison

Signal	Marek DiagnosticsA	Walk-In Lab	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	✗ Not Disclosed	Marek
Vial Trust Score	75/100	78/100	Walk-In

Vial Analysis

Our Assessment

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

Walk-In Lab

Best for

Cost-conscious patients

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

Marek Diagnostics

DeliveryTelehealth Only

Price TierPremium

HQScottsdale, AZ

Services: TRT, HRT, Metabolic Health +1

Profile →Report →

Provider B

Walk-In Lab

DeliveryOnline Only

Price TierBudget

Profile →Report →

Want to run a full compliance report on either provider?

Marek Diagnostics Report →|Walk-In Lab 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.