Health AI

YEAR

2026

OVERVIEW

Led the 0→1 design of an agentic Health AI assistant integrated with One Medical within a HIPAA-compliant system — enabling Amazon customers to get health guidance through conversational AI with safe clinical escalation paths.


  • The U.S. healthcare experience is fragmented — each provider sees only parts of a patient's health puzzle

  • Nearly two-thirds of Americans feel overwhelmed by the healthcare system; patients delay care because of costs and confusion

  • Patients make decisions based on generic internet searches that ignore their personal health circumstances, face weeks-long waits, repetitive paperwork, and impersonal disconnected systems

  • No existing tool could provide personalized guidance grounded in a patient's complete medical history without requiring manual upload from multiple providers

PROBLEM

PROBLEM


  • The U.S. healthcare experience is fragmented — each provider sees only parts of a patient's health puzzle

  • Nearly two-thirds of Americans feel overwhelmed by the healthcare system; patients delay care because of costs and confusion

  • Patients make decisions based on generic internet searches that ignore their personal health circumstances, face weeks-long waits, repetitive paperwork, and impersonal disconnected systems

  • No existing tool could provide personalized guidance grounded in a patient's complete medical history without requiring manual upload from multiple providers

process

PROCESS


  • Co-developed from day one with One Medical's clinical leadership (Chief Medical Officer Dr. Andrew Diamond directly involved at every stage)

  • Beta tested with select One Medical members since early 2025; clinical team evaluated performance across thousands of synthetically generated conversations spanning clinical safety, emergency response, and compliance

  • Evaluation framework required the AI to meet or exceed clinician-level performance on safety-critical decisions before deployment

  • Launched January 21, 2026 in the One Medical app → expanded to Amazon.com and Amazon app in March 2026


design decisionImage of multiple pixelated flat icons

KEY DESIGN DESICION


  1. Multi-agent architecture, not a single chatbot — a core agent communicating with patients, sub-agents handling specific workflows (appointments, Rx renewals), auditor agents reviewing conversations in real time, and sentinel agents standing watch with escalation paths into human providers

  2. Three-layer safety guardrails — Layer 1: Amazon Bedrock Guardrails (input content filtering); Layer 2: LLM-based Auditor detecting 5 healthcare-specific risk categories (mental health crisis, sycophancy, malpractice, malicious users, frustrated users) running in parallel adding zero latency; Layer 3: Safety Assistant that takes over and never hands back when thresholds are breached

  3. Complement, never replace providers — clinical escalation automatically triggers when symptoms warrant human judgment, connecting patients via messaging, immediate video call, or same/next-day in-person appointment

  4. Personalized via Health Information Exchange — accesses complete medical records (labs, medications, diagnoses) without requiring patients to manually upload from multiple providers

  5. HIPAA-compliant by default — conversations are NOT automatically added to the medical record; encryption + strict access controls; Amazon does not sell PHI

result

OUTCOME

  • ~9.4K daily active users — scaled from 0→1 within months of launch

  • ~2K new One Medical memberships/day — users loved it enough to convert to paid members

  • "Overwhelmingly positive" reception — from both patients and providers, per Amazon's official announcement

  • Expanded from beta → all U.S. customers — launched on One Medical app (Jan 2026), then Amazon.com and Amazon app (Mar 2026)

  • Partnerships with major health systems — Rush University Health and Cleveland Clinic integrated for primary-to-specialty care continuity

Health AI

YEAR

2026

OVERVIEW

Led the 0→1 design of an agentic Health AI assistant integrated with One Medical within a HIPAA-compliant system — enabling Amazon customers to get health guidance through conversational AI with safe clinical escalation paths.


  • The U.S. healthcare experience is fragmented — each provider sees only parts of a patient's health puzzle

  • Nearly two-thirds of Americans feel overwhelmed by the healthcare system; patients delay care because of costs and confusion

  • Patients make decisions based on generic internet searches that ignore their personal health circumstances, face weeks-long waits, repetitive paperwork, and impersonal disconnected systems

  • No existing tool could provide personalized guidance grounded in a patient's complete medical history without requiring manual upload from multiple providers

PROBLEM

PROBLEM


  • The U.S. healthcare experience is fragmented — each provider sees only parts of a patient's health puzzle

  • Nearly two-thirds of Americans feel overwhelmed by the healthcare system; patients delay care because of costs and confusion

  • Patients make decisions based on generic internet searches that ignore their personal health circumstances, face weeks-long waits, repetitive paperwork, and impersonal disconnected systems

  • No existing tool could provide personalized guidance grounded in a patient's complete medical history without requiring manual upload from multiple providers

process

PROCESS


  • Co-developed from day one with One Medical's clinical leadership (Chief Medical Officer Dr. Andrew Diamond directly involved at every stage)

  • Beta tested with select One Medical members since early 2025; clinical team evaluated performance across thousands of synthetically generated conversations spanning clinical safety, emergency response, and compliance

  • Evaluation framework required the AI to meet or exceed clinician-level performance on safety-critical decisions before deployment

  • Launched January 21, 2026 in the One Medical app → expanded to Amazon.com and Amazon app in March 2026


design decisionImage of multiple pixelated flat icons

KEY DESIGN DESICION


  1. Multi-agent architecture, not a single chatbot — a core agent communicating with patients, sub-agents handling specific workflows (appointments, Rx renewals), auditor agents reviewing conversations in real time, and sentinel agents standing watch with escalation paths into human providers

  2. Three-layer safety guardrails — Layer 1: Amazon Bedrock Guardrails (input content filtering); Layer 2: LLM-based Auditor detecting 5 healthcare-specific risk categories (mental health crisis, sycophancy, malpractice, malicious users, frustrated users) running in parallel adding zero latency; Layer 3: Safety Assistant that takes over and never hands back when thresholds are breached

  3. Complement, never replace providers — clinical escalation automatically triggers when symptoms warrant human judgment, connecting patients via messaging, immediate video call, or same/next-day in-person appointment

  4. Personalized via Health Information Exchange — accesses complete medical records (labs, medications, diagnoses) without requiring patients to manually upload from multiple providers

  5. HIPAA-compliant by default — conversations are NOT automatically added to the medical record; encryption + strict access controls; Amazon does not sell PHI

result

OUTCOME

  • ~9.4K daily active users — scaled from 0→1 within months of launch

  • ~2K new One Medical memberships/day — users loved it enough to convert to paid members

  • "Overwhelmingly positive" reception — from both patients and providers, per Amazon's official announcement

  • Expanded from beta → all U.S. customers — launched on One Medical app (Jan 2026), then Amazon.com and Amazon app (Mar 2026)

  • Partnerships with major health systems — Rush University Health and Cleveland Clinic integrated for primary-to-specialty care continuity

Health AI

YEAR

2026

OVERVIEW

Led the 0→1 design of an agentic Health AI assistant integrated with One Medical within a HIPAA-compliant system — enabling Amazon customers to get health guidance through conversational AI with safe clinical escalation paths.


  • The U.S. healthcare experience is fragmented — each provider sees only parts of a patient's health puzzle

  • Nearly two-thirds of Americans feel overwhelmed by the healthcare system; patients delay care because of costs and confusion

  • Patients make decisions based on generic internet searches that ignore their personal health circumstances, face weeks-long waits, repetitive paperwork, and impersonal disconnected systems

  • No existing tool could provide personalized guidance grounded in a patient's complete medical history without requiring manual upload from multiple providers

PROBLEM

PROBLEM


  • The U.S. healthcare experience is fragmented — each provider sees only parts of a patient's health puzzle

  • Nearly two-thirds of Americans feel overwhelmed by the healthcare system; patients delay care because of costs and confusion

  • Patients make decisions based on generic internet searches that ignore their personal health circumstances, face weeks-long waits, repetitive paperwork, and impersonal disconnected systems

  • No existing tool could provide personalized guidance grounded in a patient's complete medical history without requiring manual upload from multiple providers

process

PROCESS


  • Co-developed from day one with One Medical's clinical leadership (Chief Medical Officer Dr. Andrew Diamond directly involved at every stage)

  • Beta tested with select One Medical members since early 2025; clinical team evaluated performance across thousands of synthetically generated conversations spanning clinical safety, emergency response, and compliance

  • Evaluation framework required the AI to meet or exceed clinician-level performance on safety-critical decisions before deployment

  • Launched January 21, 2026 in the One Medical app → expanded to Amazon.com and Amazon app in March 2026


design decisionImage of multiple pixelated flat icons

KEY DESIGN DESICION


  1. Multi-agent architecture, not a single chatbot — a core agent communicating with patients, sub-agents handling specific workflows (appointments, Rx renewals), auditor agents reviewing conversations in real time, and sentinel agents standing watch with escalation paths into human providers

  2. Three-layer safety guardrails — Layer 1: Amazon Bedrock Guardrails (input content filtering); Layer 2: LLM-based Auditor detecting 5 healthcare-specific risk categories (mental health crisis, sycophancy, malpractice, malicious users, frustrated users) running in parallel adding zero latency; Layer 3: Safety Assistant that takes over and never hands back when thresholds are breached

  3. Complement, never replace providers — clinical escalation automatically triggers when symptoms warrant human judgment, connecting patients via messaging, immediate video call, or same/next-day in-person appointment

  4. Personalized via Health Information Exchange — accesses complete medical records (labs, medications, diagnoses) without requiring patients to manually upload from multiple providers

  5. HIPAA-compliant by default — conversations are NOT automatically added to the medical record; encryption + strict access controls; Amazon does not sell PHI

result

OUTCOME

  • ~9.4K daily active users — scaled from 0→1 within months of launch

  • ~2K new One Medical memberships/day — users loved it enough to convert to paid members

  • "Overwhelmingly positive" reception — from both patients and providers, per Amazon's official announcement

  • Expanded from beta → all U.S. customers — launched on One Medical app (Jan 2026), then Amazon.com and Amazon app (Mar 2026)

  • Partnerships with major health systems — Rush University Health and Cleveland Clinic integrated for primary-to-specialty care continuity

Interested in working with Ayaka?

Let's build something great together 🤝🚀

aterashi527@gmail.com

5:04:23 PM

Interested in working with Ayaka?

Let's build something great together 🤝🚀

aterashi527@gmail.com

5:04:23 PM

Interested in working with Ayaka?

Let's build something great together 🤝🚀

aterashi527@gmail.com

5:04:23 PM