Terms of Service

1. Acceptance of terms

By accessing or using the haau3 platform and its APIs (the “Services”), you agree to these Terms of Service with Brian K. Fung Media LLC, doing business as haau3 (“haau3”, “we”). If you are using the Services on behalf of an organization, you agree on its behalf.

2. The Services

The haau3 platform provides developer-facing healthcare APIs. Every plan includes every API on the platform. The Services are offered as a preview: they may change, be limited, or be discontinued, and we give notice before a change to what your plan includes.

3. Accounts and organizations

Access is organized around organizations. You are responsible for safeguarding your credentials and any activity under your organization, and for ensuring your team members comply with these terms.

4. Acceptable use

You agree not to misuse the Services, including by exceeding rate limits, attempting to disrupt the platform, reverse-engineering non-public components, or using the Services in violation of applicable law. The platform handles public and synthetic data by default; do not transmit protected health information except through Services explicitly designated to receive it under an executed agreement.

The Services designated to receive protected health information are listed at docs.haau3.com/patient-data, which says what each one receives, keeps and logs. Before sending protected health information to one, your organization must be on the Team or Scale plan and have a business associate agreement (BAA) with haau3 in force. Any member of your organization can request one from the Support page in your dashboard, on any plan; write to hello@haau3.com with a question. Without both, send a designated Service only test data, marked as such as that page describes. The dashboard at platform.haau3.com is not for protected health information: its MedList playground sends synthetic example records only, its Pharmacy Benefits playground sends synthetic test members to the Sandbox only, and its Structured Sig playground takes a prescription’s directions only, never a patient’s name or details.

5. Fees

Paid plans are sold on our pricing page and billed monthly, in advance, in US dollars, to the card your organization adds at checkout. Payments are processed by Stripe through our billing provider, Clerk. Each plan's limits on requests are the ones on the pricing page. On the Developer plan, requests stop at the month's allowance until the 1st of the next month. On the Team and Scale plans, requests keep working past it with no extra charge, and if your organization keeps going past it we may get in touch about a plan that fits.

You can change or cancel your plan at any time in your organization's billing settings. A cancellation takes effect at the end of the current billing period, and your plan stays in force until then. A move to a larger plan takes effect straight away. Fees already paid are not refunded.

We give 30 days' notice of any change to a price.

A business associate agreement (BAA) can be requested on any plan from the Support page in your dashboard; sending protected health information needs the Team or Scale plan and the agreement in force.

6. Disclaimers

The Services are provided “as is,” without warranties of any kind. The Services are not a medical device and do not provide medical advice. You are responsible for validating data for your use case.

7. Limitation of liability

To the maximum extent permitted by law, haau3 will not be liable for any indirect, incidental, or consequential damages arising from your use of the Services.

8. Changes

We may update these terms from time to time. Material changes will be communicated through the platform or by email. Continued use after changes constitutes acceptance.

9. Trademarks

HL7®, FHIR®, and the FHIR flame mark are the registered trademarks of Health Level Seven International. FHIR® is the registered trademark of Health Level Seven International and its use here does not constitute endorsement by HL7. Other names and marks are the property of their respective owners.

10. Third-party content and terminology licences

Some Services return content from clinical code systems published by third parties. Your use of that content is subject to the publisher's own licence, and using our APIs makes you a downstream user of those terms.

This material contains content from LOINC (http://loinc.org). LOINC is copyright © Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license. LOINC® is a registered United States trademark of Regenstrief Institute, Inc.

Individual LOINC codes may carry a further copyright held by the party that created the underlying instrument, most often a survey or assessment. Where one does, we return that notice with the code, and you must keep it with the code wherever you use it.

The same applies to a whole questionnaire. We serve copies of a curated set and can reach any questionnaire LOINC publishes, and each one carries its notices inside its own copyright element. Those notices differ from form to form, so keep the element with the form wherever you store, display or forward it rather than relying on any single notice covering them all. One of those notices reads: Copyright © Pfizer Inc. All rights reserved. Developed by Drs. Robert L. Spitzer, Janet B.W. Williams, Kurt Kroenke and colleagues, with an educational grant from Pfizer Inc. No permission required to reproduce, translate, display or distribute. Another questionnaire we serve is the AUDIT, a World Health Organization instrument that WHO publishes for free reproduction; check WHO's own terms for your use of it.

This product uses publicly available data courtesy of the U.S. National Library of Medicine (NLM), National Institutes of Health, Department of Health and Human Services; NLM is not responsible for the product and does not endorse or recommend this or any other product.

This product uses ICD-10-CM, developed by the National Center for Health Statistics (NCHS) of the Centers for Disease Control and Prevention (CDC). ICD-10-CM is available from CDC at no charge at https://www.cdc.gov/nchs/icd/icd-10-cm/index.html. The use of ICD-10-CM here does not imply endorsement by CDC, HHS or the United States Government of haau3 or its products and services. Reference to specific commercial products, manufacturers, companies, or trademarks does not constitute its endorsement or recommendation by the U.S. Government, Department of Health and Human Services, or Centers for Disease Control and Prevention.

Some code systems are held here rather than resolved from their own source each time you ask. Held means we take in one dated release of the code system, check it, and answer from our own copy of it; RxNorm is served this way, from its Current Prescribable Content release, and so is ICD-10-CM, from its release of the whole code set. A held code system is served from a dated release, named in the version parameter of every lookup answer and in the conformance resource at api.haau3.com/v1/fhir/r4/metadata?mode=terminology. A held release may not reflect the most current data available from its publisher.

We do not serve every code system, and we say which and why. Our terminology operations do not serve SNOMED CT: it is free in the United States only through a UMLS Metathesaurus licence that each organisation must hold for itself, so we cannot cover you under ours. Structured Sig's answers carry only SNOMED CT concepts from the Global Patient Set, which needs no licence (below). CPT requires a paid licence from the American Medical Association, which we do not hold. Requests for a system we do not serve get a clear refusal naming the reason, never a guess. Our terminology operations serve LOINC, RxNorm and ICD-10-CM. The current list is at api.haau3.com/v1/fhir/r4/metadata?mode=terminology and needs an API key to read.

Structured Sig's answers carry SNOMED CT concepts only from the SNOMED CT Global Patient Set (GPS), release 2026-01-01, by SNOMED International, licensed under the Creative Commons Attribution-NoDerivatives 4.0 International License (https://creativecommons.org/licenses/by-nd/4.0/). Each concept's identifier and term are sent unmodified. SNOMED CT is © and ® SNOMED International. SNOMED CT® was originally created by the College of American Pathologists. The GPS is provided as is, without warranty.

This material includes SNOMED Clinical Terms® (SNOMED CT®) which is used by permission of the International Health Terminology Standards Development Organisation (IHTSDO). All rights reserved. SNOMED CT®, was originally created by The College of American Pathologists. "SNOMED" and "SNOMED CT" are registered trademarks of the IHTSDO.

The SNOMED CT concepts were selected using the UMLS Metathesaurus from the U.S. National Library of Medicine, release 2026AA, which holds the US Edition of SNOMED CT of 2026-03-01. NLM does not endorse haau3 or its products.

Structured Sig's answers carry route codes from the NCI Thesaurus™, version 26.10d, produced by the Enterprise Vocabulary Services group of the Center for Biomedical Informatics and Information Technology, National Cancer Institute, Maryland, USA, and released under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). Each code and its term are sent unmodified, and are provided as is, without warranty. The routes Structured Sig uses are a selection of its codes, not the NCI Thesaurus.

Terminology content is provided as supplied by its publisher, and its publishers make no warranty as to accuracy, completeness, timeliness or availability. Neither do we.

11. Contact

Questions about these terms can be directed to hello@haau3.com.