Ambience Healthcare
Unicorn · $1.3BSan Francisco, US · Founded 2020 · Delaware corporation · 13 known investors
Ambience is an AI platform that captures clinical encounters in real time, generates documentation, and suggests coding for healthcare providers across 200+ specialties. The platform helps health systems reduce clinician documentation burden, improve revenue integrity through coding accuracy, and ensure compliance.
Also known as Ambience · Ambience Healthcare, Inc.
Founders & leadership
Ambience Healthcare was founded in 2020 by Michael Ng and Nikhil Buduma.
Board
Investors · 13
Also in the syndicate · 1
Reported raises · per SEC filings
Form D private placements$195M disclosed across 2 of 4 rounds · 2023–2025
▶$140MraisedSep 2025 · 16 investors · Other TechnologyRule 506(b)
- Mamoon HamidDirector
- Vignesh ChandramouliDirector
- Michael NgExecutive Officer, Director, Promoter
- Nikhil BudumaExecutive Officer, Director, Promoter
- Offering amount
- $190M
- Amount sold
- $140M
- First sale
- Jul 2025
- Incorporated
- Corporation, Delaware, 2020
- Federal exemptions
- 06b
▶$55MraisedFeb 2024 · 12 investors · Other TechnologyRule 506(b)
- Mamoon HamidDirector
- Michael NgExecutive Officer, Director, Promoter
- Nikhil BudumaExecutive Officer, Director, Promoter
- Offering amount
- $70M
- Amount sold
- $55M
- First sale
- Dec 2023
- 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 2026Ambience Healthcare develops an AI platform for clinical documentation, medical coding, and clinical documentation integrity (CDI) used inside health systems. The software listens ambiently during patient encounters and produces specialty-accurate notes, orders, and patient instructions in real time, along with ICD-10 codes, HCC/MCC/CC classifications, and E&M levels that the clinician reviews and attests. Additional capabilities include chart summarization, reconciliation of conflicting medication and problem lists, chart question-answering with cited sources, task tracking from rounds and visits, and surfacing of CDI gaps at the point of care. For administrators, the platform standardizes workflows across coding, quality, CDI, prior authorization, and utilization management; for patients, it generates after-visit summaries.
The platform is deployed across ambulatory, emergency department, and inpatient settings. Company materials cite support for more than 200 specialties, while its Series C announcement and corporate boilerplate reference more than 100 ambulatory subspecialties, ED, and inpatient specialties. Its earlier flagship product was Ambience AutoScribe, a fully automated AI medical scribe that wrote documentation into the EMR. The company has since introduced a Patient Summary chart-summarization feature, inpatient AI, and a Nursing Suite for inpatient nursing, and markets an underlying agent harness called Chorus described as a combined system of context and system of action, with governance and telemetry layers for auditability.
Founding story
Ambience was founded in 2020 by Michael Ng and Nikhil Buduma, who had previously co-founded Remedy Health together, where Ng was COO and Buduma was Chief Scientist. The company was framed around the administrative documentation burden that leaves providers doing hours of after-hours charting and contributes to burnout and attrition.
Business model
Ambience sells its AI platform to hospitals and health systems on an enterprise basis, integrating with existing EHR systems rather than requiring workflow redesign or staff retraining. The company markets a full-service, forward-deployed implementation team and states that fees are tied to attained outcomes.
Enterprise software sold to health systems, with the company stating that fees are tied to attained results and that ROI is measured against realized return, coding integrity, and audit-defensible revenue.
Traction
More than 40 U.S. health systems had deployed the platform as of July 2025, including Cleveland Clinic, UCSF Health, Houston Methodist, and Memorial Hermann. Cleveland Clinic signed an exclusive five-year partnership after a six-month competitive pilot. The company reports over 3x ROI for institutions, 95% AAPC-verified coding accuracy, 70+ NPS, use in 80% of visits, a 97.7 KLAS customer satisfaction score, and a claimed 45% reduction in charting time; at Ardent it cites $3 of operating margin per $1 spent. In June 2023 it claimed a 78% average reduction in documentation time and 7-17x ROI across customers.
Latest developments
Following the July 2025 Series C, reported developments include joining the Epic Toolbox to unlock AI functionality within Haiku for Epic customers, the launch of a Patient Summary chart-summarization capability, an enterprise rollout with Houston Methodist announced February 2026, the hiring of Michael Han, MD, MBA as Chief Medical Officer in April 2026, the unveiling of inpatient AI in May 2026, and the launch of a Nursing Suite extending the platform across inpatient nursing in July 2026. The company also markets Chorus, an agent harness for healthcare that serves as a shared system of context and action across its products.
▸Full profile — market position, technology, go-to-market, geography, history
Market position
Ambience is one of the larger funded companies in the ambient clinical AI documentation category, alongside competitors such as Abridge and Dragon Copilot. Its $243 million Series C was described as one of the largest health tech raises of 2025 and contributed to roughly $975 million in announced 2025 funding for ambient AI documentation companies by one analysis. More than 40 U.S. health systems had deployed its technology as of July 2025, and it reported a 97.7 customer satisfaction score in KLAS evaluations.
Ambience positions itself as going beyond transcription to produce specialty-aware, coding-aware documentation with ICD-10 assistance and a real-time compliance engine embedded in the existing EHR workflow, and states it is the first ambient solution with third-party validated, CFO-approved ROI tied to coding accuracy and compliance. It reports the highest clinician adoption in head-to-head evaluations, including an NPS 63 points higher than the next-best solution and 92% clinician adoption at MultiCare.
Technology
The platform is built on proprietary AI reasoning models purpose-built for the regulatory, clinical, and operational demands of healthcare, layered on frontier models. Chorus, described as an agent harness for healthcare, extracts and reconciles chart data into a single record the AI can reason over and writes decisions back into systems of record, with governance and telemetry for auditability; the company claims 95% less EHR transaction load and 50% lower latency. Ambience integrates natively with Epic (including Haiku via Epic Toolbox), Oracle Cerner via bidirectional APIs, athenahealth, and other major EHRs. Reported technologies in use include PyTorch, Go, and Microsoft Azure.
Go-to-market
Ambience sells enterprise-wide to large health systems, often entering through ambient scribing and expanding into coding, CDI, and broader clinical workflow. It uses competitive head-to-head pilots and evaluations (for example at Cleveland Clinic and MultiCare), third-party validation such as KLAS reports, AAPC coding verification, and a peer-reviewed Cleveland Clinic study, plus EHR ecosystem distribution including Epic's Toolbox program for Haiku.
Hospitals and health systems, including large multi-site academic and community systems, and the clinicians, coding/CDI and revenue-cycle administrators, and informatics teams within them, across ambulatory, emergency department, and inpatient care settings.
Geography
Headquartered in San Francisco, California, with most roles remote-friendly across the United States. Customers are health systems across North America, including Cleveland Clinic, UCSF Health, Houston Methodist, Memorial Hermann, MultiCare, Ardent, and St. Luke's Health System. One directory listing describes employees across North America, Asia, and Europe.
History
Ambience Healthcare was founded in 2020 in San Francisco by Mike (Michael) Ng and Nikhil Buduma. It launched Ambience AutoScribe, a fully automated AI medical scribe, publicly in February 2023, and by mid-2023 was citing customer-reported documentation-time and throughput gains. The company raised a $70 million Series B in February 2024 and a $243 million Series C announced on July 29, 2025. In February 2025 the Cleveland Clinic selected Ambience following a six-month head-to-head pilot of five ambient scribe vendors. Subsequent developments reported include an Epic Toolbox listing, an enterprise rollout with Houston Methodist announced in February 2026, the appointment of Michael Han, MD, MBA as Chief Medical Officer in April 2026, inpatient AI in May 2026, and a Nursing Suite in July 2026.
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.
Competitors · 10
by search overlapCompanies competing with Ambience Healthcare for the same Google search keywords, organic and paid, via search-intersection analysis.
Timeline · 10
launches, deals, and filingsAmbience introduced a Nursing Suite to extend its system of intelligence across inpatient nursing workflows.
Ambience integrates natively with Epic and was added to Epic's Toolbox program for ambient tools; it also connects with Cerner via bidirectional APIs.
The company introduced inpatient AI capabilities that reason beyond the bedside recording transcript.
Han leads Ambience's clinical strategy as the company expands beyond ambient documentation into a broader system of intelligence spanning clinical workflow, revenue integrity, and operational performance.
Ambience announced an enterprise deployment with Houston Methodist to enhance patient care and clinical workflows.
Round co-led by Oak HC/FT and Andreessen Horowitz (a16z), with participation from OpenAI Startup Fund, Kleiner Perkins, Optum Ventures, and new investors Frist Cressey Ventures, Town Hall Ventures, Smash Capital, Georgian, and Founders Circle Capital. Proceeds earmarked for expanding the platform to more health systems and building additional products.
$243M source ↗
Cleveland Clinic rolled out Ambience following a six-month pilot comparing five major ambient scribe vendors on documentation quality, features, provider satisfaction, ease of implementation, and ROI.
Ambience introduced "Patient Summary," described by the company as the first chart summarization technology from an ambient AI platform.
Ambience Healthcare launched AutoScribe to address clinician burnout across major provider organizations, capturing provider-patient conversation into documentation within the 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
- Ambience Healthcareambiencehealthcare.com · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Ambience Healthcare do?
- Ambience Healthcare builds an ambient AI platform for clinical documentation, point-of-care coding, and CDI at health systems.
- Who founded Ambience Healthcare?
- Ambience Healthcare was founded by Michael Ng, Nikhil Buduma in 2020.
- Who are Ambience Healthcare's investors?
- Ambience Healthcare's investors include 500 Global, AirTree Ventures, AIX Ventures, Andreessen Horowitz, Collective Liquidity, Founders Circle Capital, Friale, Frist Cressey Ventures and 4 more.
- How much funding has Ambience Healthcare raised?
- Ambience Healthcare has disclosed $195M raised across 2 of its 4 known rounds.
- Where is Ambience Healthcare headquartered?
- Ambience Healthcare is headquartered in San Francisco, US.










