Zus Health
Watertown, US · Founded 2020 · Delaware corporation · 96 employees on LinkedIn · 6 known investors
Zus provides a platform that removes data waste in healthcare, enabling developers, clinicians, and operators to innovate in patient and care team experience without building underlying infrastructure.
Also known as Zus · Zus Health, Inc.
Founders & leadership
Zus Health was founded in 2020 by Jonathan Bush.
Board
Investors · 6
Reported raises · per SEC filings
Form D private placements$61.9M disclosed across 2 of 4 rounds · 2021–2023
▶$28.3MraisedMar 2023 · 22 investors · Other Health CareRule 506(b)
- Benjamin SilverDirector
- Fay RotenbergDirector
- Travis SmithExecutive Officer
- Andrew Firlik, M.D.Director
- Jonathan BushExecutive Officer, Director
- Julie YooDirector
- Carl ByersDirector
- Offering amount
- $40M
- Amount sold
- $28.3M
- First sale
- Feb 2023
- Incorporated
- Corporation, Delaware, 2020
- Federal exemptions
- 06b
▶$33.6MraisedJul 2021 · 34 investors · Other Health CareRule 506(b)
- Jonathan BushExecutive Officer, Director
- Steven FisherDirector
- Fay RotenbergDirector
- Julie YooDirector
- Benjamin SilverDirector
- Travis SmithExecutive Officer
- Offering amount
- $33.6M
- Amount sold
- $33.6M
- First sale
- Jun 2021
- Incorporated
- Corporation, Delaware, 2020
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
Valuation · disclosed
Disclosed eventsSource: SEC prospectus filings, and round valuations the company or its investors disclosed — follow each entry's link for the claim.
Company profile
researched Aug 2026Zus Health is a healthcare data infrastructure company founded in 2020 in Watertown, Massachusetts by Jonathan Bush, co-founder and former CEO of athenahealth. Its platform aggregates external patient data and delivers it at the point of care through APIs, embedded components and direct integrations with electronic health record software, so that healthcare developers, clinicians and operators can build patient and care-team experiences without constructing the underlying data infrastructure themselves.
The company's cornerstone product is the Zus Aggregated Profile (ZAP), a single shareable view of a patient's recent and ongoing healthcare interactions, which applications can both read from and write back to. Around the ZAP, Zus offers flexible APIs, embedded UI components and full-service end-to-end workflow applications, alongside a HIPAA-compliant, FHIR-native data store with provenance tracking, a terminology service, a CDA-to-FHIR parser API, and a proprietary Universal Patient Index that matches patient identities across data sources under a universal identifier. Data can be consumed via a GraphQL API for application use cases, SQL queries against rectangularized data marts for analytics, or event messages when new or updated patient records arrive.
Customer scenarios described by the company include a startup treating patients with severe mental illness that embedded Zus into provider workflows to review patient history before appointments, a telehealth dietitian service that reduced patient intake burden, and a multi-specialty chronic care provider that receives alerts when patients fill or miss prescriptions.
Founding story
Jonathan Bush established Zus Health in 2020 in Watertown, Massachusetts after co-founding and leading athenahealth, framing the venture around the belief that providers should be able to work from the whole truth about a patient rather than only data they or their patients had typed in themselves.
Business model
Zus sells access to its health data platform to healthcare organizations and digital health builders, who integrate the Zus Aggregated Profile and underlying data through APIs, embedded components or full-service applications rather than building their own data infrastructure. As of March 2023 the company reported working with about 30 companies, and its CEO stated the business was oriented around a core engineering and product group rather than heavy sales and marketing spend.
Traction
As of March 2023, Zus reported roughly 54 employees, about 30 customer companies, network access to data across more than 70,000 provider sites and 270 million patients, and $74 million raised to date. Partnerships include Elation Health, whose EHR is used by more than 23,000 clinicians, as well as Healthie and Canvas Medical. A February 2025 company announcement referenced new clients and AI-powered product additions, and an October 2025 announcement addressed risk-capture workflows for value-based care organizations.
Latest developments
In March 2023 Zus raised $40 million from Jazz Venture Partners, F-Prime Capital, Maverick Ventures and Andreessen Horowitz, with Jazz managing partner Andrew Firlik joining the board, and announced an EHR partnership with Elation Health. Company announcements in February 2025 covered new clients and AI-powered innovations, and in October 2025 covered evidence-based risk-capture workflows for value-based care organizations.
▸Full profile — market position, technology, go-to-market, geography, history
Market position
The company operates in the healthcare interoperability and clinical data aggregation segment, positioning itself as a common data layer used by digital health builders and EHR vendors. It states its network reaches data across more than 70,000 provider sites and 270 million patients, with Zus Aggregated Profiles containing data touching over 98% of Americans. Its CEO pegged the company's valuation at $190 million in March 2023.
Zus positions itself as shared, cross-tenant infrastructure — a 'network of networks' health data grid — that removes commoditized work such as eMPI logic, terminology normalization and CDA parsing from customers' roadmaps. Its CEO has described the offering as a shared data record back end plus SDK, allowing digital health companies to concentrate engineering effort on differentiating front-end products.
Technology
The platform is built on a HIPAA-compliant, FHIR-native data store with detailed provenance and a terminology service, and is SOC 2 Type 2 compliant. It maintains bidirectional connections with external national data networks for ingesting and contributing patient data, includes a dedicated CDA-to-FHIR parser API to convert legacy XML CDA documents into FHIR JSON, and uses a proprietary Universal Patient Index to link identities across sources. Zus applies data cleansing and terminology crosswalks across code sets such as ICD-9, ICD-10 and SNOMED, plus clinical logic to rank records by relevance, and exposes data through a GraphQL API, SQL-queryable data marts and record-update messaging.
Go-to-market
Zus reaches customers through integrations and partnerships with EHR and digital health platform vendors that embed the Zus Aggregated Profile into their products, and through developer-led adoption supported by public documentation and a self-serve sandbox environment. The CEO stated in 2023 that the company did not intend to spend heavily on sales and marketing.
Healthcare developers, clinicians and operators; digital health companies and EHR vendors (for example Elation Health, Healthie and Canvas Medical); healthcare organizations serving payer, employer and provider customers; and, per 2025 press mentions, value-based care organizations.
Geography
Headquartered in Watertown, Massachusetts, with a data network spanning U.S. provider sites and national health information networks.
History
Zus Health launched in 2020, founded by Jonathan Bush, who co-founded athenahealth in 1997, took it public in 2007 and led it until 2018, and subsequently served as executive chairman of Firefly Health. The company raised $34 million in Series A financing in 2021 with participation from a16z and Rock Health, and added $40 million in March 2023, bringing total capital raised to $74 million at that point. Alongside the 2023 raise, Zus announced a partnership with Elation Health, following earlier integrations with Healthie and Canvas Medical.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Founder mafia
2 people who came through Zus Health went on to found or lead other companies.
Competitors · 5
by search overlap
Companies competing with Zus Health for the same Google search keywords, organic and paid, via search-intersection analysis.
Timeline · 6
launches, deals, and filingsCompany announcement describing workflows to help value-based care organizations capture accurate risk using evidence-based tooling.
Company announcement covering growth, new clients and AI-powered product innovations.
Zus Health announced $40 million in new capital backed by Jazz Venture Partners, F-Prime Capital, Maverick Ventures and Andreessen Horowitz, bringing total funding to $74 million. Jazz Venture Partners managing partner Andrew Firlik joined the board.
$40M source ↗
Elation Health, an EHR vendor for primary care practices used by more than 23,000 clinicians, agreed to integrate Zus patient data profiles so providers can access expanded records from hospitals, clinics, labs and pharmacies in real time.
Zus integrated the Zus Aggregated Profile into Canvas Medical's Canvas Contributor Program, which allows third parties to build features and integrations on the Canvas platform.
Zus partnered with Healthie, an EMR, scheduling and engagement platform for digital health companies, to embed Zus components containing patient medical history in the Healthie EMR.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
Legal entities · 1
corporate structureIn the news
▸Research sources · 8
primary sources listed
- Zus Healthzushealth.com · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Zus Health do?
- Zus Health operates a FHIR-native health data platform that gives care teams an aggregated, shareable view of patient records.
- Who founded Zus Health?
- Zus Health was founded by Jonathan Bush in 2020.
- Who are Zus Health's investors?
- Zus Health's investors include Advection Growth Capital, Andreessen Horowitz, F-Prime Capital, JAZZ Venture Partners, Martin Ventures, Maverick Ventures.
- How much funding has Zus Health raised?
- Zus Health has disclosed $61.9M raised across 2 of its 4 known rounds.
- Where is Zus Health headquartered?
- Zus Health is headquartered in Watertown, US.