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AII-1001-02039
ReportedReported by fewer than three independent publishers, with no official finding.

ChatGPT Health delivers inaccurate health assessments from Apple Health data

ChatGPT Health reportedly delivered inaccurate and alarmist health assessments when analyzing ten years of Apple Watch data from a test user, including false cardiovascular risk warnings that a physician contradicted, and gave inconsistent results across multiple consultations with the same data.

27 January 2026 · OpenAI · Reliability and hallucination
27 January 2026
AII-1001-020392 sources ↓
Quick facts
Category
Reliability and hallucination
Country
United States
Source
La Razón
Date
27 January 2026
Drafted by
Raidu Incident Detection

What happened

ChatGPT Health, OpenAI's feature that connects Apple's Health app with the chatbot, was tested by The Washington Post analyst Geoffrey A. Fowler using ten years of accumulated health data including 29 million steps and 6 million heart rate measurements.

The system assigned a failing grade ('F') to Fowler's health despite no actual medical risks, later revising to 'D' when additional information was provided. The AI generated inconsistent conclusions, including false suggestions of cardiovascular risk, and forgot basic user data such as age and gender when consulted multiple times.

Reported impact

A physician reviewing Fowler's data confirmed he had excellent health and required no additional tests or treatment, contradicting ChatGPT Health's assessments.

The inconsistency and alarmist conclusions risk misleading users into making health decisions based on unreliable AI recommendations.

Index analysis

ChatGPT Health relies on estimated metrics like VO₂ max that smartwatches do not measure with clinical precision, contributing to inaccurate analysis.

The AI system failed to maintain consistency in its analysis, forgetting fundamental user information between separate consultations with the same data.

Governance controls

OpenAI stated that ChatGPT Health is not designed to diagnose or treat diseases. However, the tool is not subject to strict medical regulations such as HIPAA, despite handling sensitive health data.

Classification

Category
Reliability and hallucination
Industry
Healthcare, drugs and biotechnology
Country
United States
Harm status
Potential harm
Intent
Unintentional
Timing
Post-deployment
Harm types
Psychological, Public interest
Harmed
Consumers
Failure modes
Hallucination, Agent misaction
Consequences
None recorded
AI systems
ChatGPT Health

Sources and evidence

This record was researched and written by the Index, based on the following original reporting.

La Razón
Antes de darle tus datos de salud a ChatGPT, quizá deberías pensártelo dos veces
27 January 2026
infobae
Cuidado con los diagnósticos médicos de IA: advierten fallos en ChatGPT Salud desde Apple Watch
28 January 2026