Clinical Oversight & Documentation
The clinical rigor behind every LMN
Independent clinical oversight, third-party validation, and documentation built to stand up to review, so the LMNs you accept are specific, consistent, and review-ready.
What’s in Every LMN
Specific & evidence-based
When issued, each Letter of Medical Necessity is reviewed and signed by a licensed Root Cause clinician. Acceptance always remains the plan administrator’s decision.
Specific ICD-10 code
Names the diagnosed condition with its exact ICD-10 code.
Patient-specific risk factors
The patient's own documented risk factors, when risk-reduction applies.
Evidence-based rationale
Medical rationale grounded in published evidence.
Issued by a licensed clinician
Each LMN is issued by a licensed Root Cause clinician.
Specific ICD-10 code
Names the diagnosed condition with its exact ICD-10 code.
Patient-specific risk factors
The patient's own documented risk factors.
Evidence-based rationale
Medical rationale grounded in published evidence.
Issued by a licensed clinician
Each LMN is issued by a licensed Root Cause clinician.
For Plan Administrators
Each LMN gives administrators specific, consistent documentation they can rely on if a claim is later questioned.
LMNs are reviewed and signed by licensed Root Cause clinicians when issued.
Truemed provides the technology, eligibility framework, and managed services.
Our Clinical Footprint
Conditions Root Cause sees most often
A sample of the diagnosed conditions our clinicians review most often — each determination tied to a specific, coded condition.
Documentation Standards
Documentation built to stand up to review
Our documentation standards are shaped by years of real-world claims experience and refined continuously, so every LMN is specific, consistent, and review-ready.
Individualized risk documentation
When a recommendation is risk-based, the LMN documents that patient’s own risk factors, across 30+ conditions, rather than a generic prevention claim.
Standardized, audited coding
Diagnosis codes are standardized and routinely audited across Truemed’s eligibility library, so documentation stays consistent and review-ready.
Administrator-matched documentation
LMN templates are built to match the documentation formats different plan administrators expect, and the library keeps expanding.
Based on clinical evidence, not product marketing
Eligibility is anchored to an intervention’s clinical mechanism, independent of how a product is marketed.
We monitor administrator feedback continuously and strengthen our documentation standards as requirements evolve.
Governance & Security
Independent oversight, supported by 
Root Cause | the clinical practice
An independent clinical practice. Licensed clinicians review submitted information and decide whether an LMN is appropriate.
Medical decisions rest entirely with the clinician.
| technology & managed servicesProvides the platform, administrative support, and managed services behind the process, so clinicians can focus on reviewing what patients submit.
Root Cause’s managed services organization, Truemed, is SOC 2 compliant.
Independent Validation
Independently validated. Built for review.
Truemed’s evidence-based eligibility framework, the standards that determine which products and services may qualify, has been independently reviewed and validated by the Validation Institute, whose team evaluates the published evidence.
Root Cause Functional Medicine remains the independent clinical practice that reviews submitted information and issues LMNs when clinically appropriate. Truemed provides the technology and managed services behind the framework, and holds the validation.
View the Validation Institute determination →Designed to align with IRS §213(d)
Designed to meet the IRS definition of medical care for HSA/FSA eligibility.
Backed by guarantees
Two $100,000 Validation Institute guarantees: Credibility and ERISA Immunity.
Reviewed by experts
Assessed by an independent review team, not a self-certification.
The Validation Institute validation applies to Truemed’s eligibility framework (issued to True Medicine, Inc.).
Review for: Truemed
Contractual Integrity · valid through Feb 2027
Documentation on Request
Need more for your evaluation?
Request-only briefs provide the clinical, documentation, validation, and clinical, documentation, and validation context employers and plan administrators ask for.
TPA Documentation Brief
LMN documentation, record-keeping, Validation Institute materials, and audit-response context.
State Medical Board Brief
Context on structure, licensure approach, scope-of-practice, and complaint response, available on request.