Fundraising Fox

Ambience Healthcare

Unicorn · $1.3B

San 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.

MN
Michael NgCo-founder
NB
Nikhil BudumaCo-founder

Board

MHMamoon Hamid
Mamoon Hamidin𝕏Board DirectorPartner at Kleiner Perkins
VC
Vignesh ChandramouliBoard director

Investors · 13

Also in the syndicate · 1

Andreessen Horowitz (a16z)lead

Reported raises · per SEC filings

Form D private placements

$195M disclosed across 2 of 4 rounds · 2023–2025

$140MraisedSep 2025 · 16 investors · Other Technology
Rule 506(b)
Officers, directors & promoters on the filing
  • 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
Full filing on SEC EDGAR ↗
$55MraisedFeb 2024 · 12 investors · Other Technology
Rule 506(b)
Officers, directors & promoters on the filing
  • 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
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

Valuation · disclosed

Disclosed events
$1.3Bvaluation at Series CJul 2025
filing ↗

Source: SEC prospectus filings, and round valuations the company or its investors disclosed — follow each entry's link for the claim.

Company profile

researched Aug 2026

Ambience 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 reported
Clinician adoption at MultiCare (company claim)Jan 202692%
Coding accuracy, AAPC-verified (company claim)Jan 202695%
Customer ROI (company claim)Jun 20237-17x ROI across customers, realized within weeks
Documentation time reduction (company claim)Jun 202378%
EmployeesJul 2026231 employees
Estimated annual revenueJul 2026$100M - $250M (third-party estimate)
HeadcountAug 2026252
KLAS customer satisfaction scoreJul 202597.7
Net Promoter Score (company claim)Jan 202670 NPS
Reduction in charting time (company claim)Jul 202545%
Return on investment (company claim)Jan 2026Over 3x ROI; at Ardent, $3 of operating margin per $1 spent
Specialties supportedJul 2025200 specialties
Total funding raised to dateJul 2025$345M
US health systems deployedJul 202540 health systems
Utilization (company claim)Jan 202680%
ValuationJul 2025$1.3B

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

Competitors · 10

by search overlap
Athenahealth Inc65 shared keywordsCloud-based healthcare platform for clinical workflows
PatientKeeper61 shared keywordsCommure develops software solutions for healthcare providers and administrators to reduce documentation burden, streamline denial management, and improve staff safety infrastructure. The company works with health systems to simplify healthcare delivery operations.
Freed59 shared keywordsFreed builds an AI assistant for clinicians that generates clinical notes from patient encounters, offering customizable templates, visit prep summaries, patient-friendly instructions, referral and other letters, and suggested billable ICD-10, CPT, and E/M codes that can sync to an EHR. It serves healthcare providers looking to reduce documentation time.
Carbon Health55 shared keywordsCarbon Health operates a chain of clinics offering urgent care, primary care, and chronic condition management, combining technology with in-person care to provide broader access to health services. It serves patients seeking everyday healthcare across acute, primary, and chronic needs.
DeepScribe51 shared keywordsDeepScribe builds an ambient AI documentation platform for oncology, including an AI medical scribe, pre-visit chart summaries, AI medical coding, and note customization. It serves community oncology clinicians and integrates with EHR systems such as OncoEMR and iKnowMed.
Athelas51 shared keywordsAthelas develops software tools for private practice healthcare providers to reduce administrative burden, improve operational efficiency, and enhance patient scheduling and navigation capabilities.
Elion49 shared keywords
Heidi45 shared keywordsHeidi builds an AI Care Partner platform that augments clinical workflows through an AI scribe and a medical research tool called Evidence, serving clinicians across hospitals and healthcare systems globally. The platform supports millions of weekly consultations across 110 languages and 190 countries.
Epic42 shared keywordsEpic develops electronic health record (EHR) software used by healthcare organizations and hospitals to manage patient records and clinical operations. The company supports a community of healthcare providers through its software platform and related programs.
Abridge41 shared keywordsAbridge builds AI software that converts clinical conversations into structured insights for healthcare providers. The platform helps clinicians and patients by automating documentation and improving clinical decision-making from the conversation itself.

Companies competing with Ambience Healthcare for the same Google search keywords, organic and paid, via search-intersection analysis.

Timeline · 10

launches, deals, and filings
Jul 2026
Launch of Nursing Suite for inpatient nursing

Ambience introduced a Nursing Suite to extend its system of intelligence across inpatient nursing workflows.

source ↗

Jul 2026
Ambience joins Epic Toolbox, enabling advanced AI functionality within Haiku

Ambience integrates natively with Epic and was added to Epic's Toolbox program for ambient tools; it also connects with Cerner via bidirectional APIs.

source ↗

Jun 2026
Collaboration with Mayo Clinic Platform

source ↗

May 2026
Ambience unveils inpatient AI

The company introduced inpatient AI capabilities that reason beyond the bedside recording transcript.

source ↗

Apr 2026
Michael Han, MD, MBA appointed Chief Medical Officer

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.

source ↗

Feb 2026
Enterprise rollout with Houston Methodist

Ambience announced an enterprise deployment with Houston Methodist to enhance patient care and clinical workflows.

source ↗

Jul 2025
Ambience Healthcare announces $243M Series C at a $1.25B valuation

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 ↗

Feb 2025
Cleveland Clinic signs exclusive five-year partnership after head-to-head scribe pilot

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.

source ↗

Jan 2025
Patient Summary chart summarization released

Ambience introduced "Patient Summary," described by the company as the first chart summarization technology from an ambient AI platform.

source ↗

Feb 2023
Launch of Ambience AutoScribe, a fully automated AI medical scribe

Ambience Healthcare launched AutoScribe to address clinician burnout across major provider organizations, capturing provider-patient conversation into documentation within the EMR.

source ↗

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

Legal entities · 1

corporate structure
Ambience HealthcareDelaware

In the news

Research sources · 8

primary sources listed

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.