Zocdoc
Unicorn · $1.8BNew York, US · Delaware corporation · 13 known investors
Zocdoc runs an online marketplace where US patients find in-network doctors and dentists and book in-person or telehealth appointments.
Also known as ZocDoc · Zocdoc, Inc.
Founders & leadership



Board

Investors · 13
Also in the syndicate · 1
Reported raises · per SEC filings
Form D private placements$80.3M disclosed across 2 of 5 rounds · 2008–2015
▶$80MraisedAug 2015 · 9 investors · Other TechnologyRule 506(b)
- Oliver KharrazExecutive Officer, Director
- Ken HoweryDirector
- Netta SamroengrajaExecutive Officer, Director
- Joaquin GamboaExecutive Officer
- Cyrus MassoumiExecutive Officer, Director
- David WeidenDirector
- Offering amount
- $150M
- Amount sold
- $80M
- Sales commissions
- $10.5M
- Placement agents
- Connaught (UK) Limited, Morgan Stanley & Co. LLC
- First sale
- Jul 2015
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
▶$301.5KraisedApr 2015 · 2 investors · Other TechnologyRule 506(b)
- Ken HoweryDirector
- Cyrus MassoumiExecutive Officer, Director
- David WeidenDirector
- Netta SamroengrajaExecutive Officer, Director
- Oliver KharrazExecutive Officer, Director
- Offering amount
- $1.5M
- Amount sold
- $301.5K
- First sale
- Mar 2015
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
▶Undisclosed amountofferedJan 2014 · 2 investors · Other TechnologyRule 506(b)
- David WeidenDirector
- Cyrus MassoumiExecutive Officer, Director
- Netta SamroengrajaExecutive Officer, Director
- Oliver KharrazExecutive Officer, Director
- Ken HoweryDirector
- First sale
- Jan 2014
- Incorporated
- Corporation, Delaware
- 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 2026Zocdoc, Inc. is a New York City-based company that operates an online service for finding and booking medical and dental appointments, both in person and by telemedicine. Patients search by symptom, specialty, visit reason or provider name, filtered by location, insurance and wait time, then view real-time open appointment slots and book them directly. The platform also serves as a physician and dentist rating and comparison database, with verified patient reviews, provider photos, education and personnel information, and estimated in-office wait times. Zocdoc says it aggregates in-person and virtual appointments across a nationwide provider network spanning more than 200 specialties and over 12,000 insurance plans.
On the provider side, Zocdoc sells a set of products that combine patient demand generation with scheduling. These include Bookable Profiles (a "Care Access Network" that adds direct booking to listings on Google, Apple, Healthgrades, Yelp, insurance directories and other sites), the Zocdoc Marketplace on zocdoc.com and its app, website scheduling widgets, patient engagement and outbound campaigns, online intake forms, appointment reminders, review collection, performance reporting, and a HIPAA-compliant video visit service. The company also markets Zo, an AI phone assistant for automating phone scheduling, listed as coming soon. Practice-facing features integrate with providers' existing calendars through EHR and practice management system connections.
The service is free for patients; providers pay to be listed and to advertise open appointment slots. Zocdoc has historically served independent practices as well as medical groups, MSOs and DSOs, corporate practices and health systems, with customer examples including The Dermatology Specialists, Dental Care Alliance and Lehigh Valley Health Network.
Founding story
Zocdoc was founded in New York City in 2007 by Cyrus Massoumi, Nick Ganju and Dr. Oliver Kharraz. Massoumi and Kharraz met as consultants at McKinsey; Kharraz is a physician from a long family line of doctors who had built and sold an internet company in 1994 during his medical training in Germany, while Ganju had held CTO roles at technology companies and had previously shared a desk with Massoumi at Trilogy Software. The idea came after Massoumi ruptured an eardrum on a flight to New York in 2007 and struggled for days to find an available local doctor's appointment. Massoumi served as the company's first CEO.
Business model
Patients use Zocdoc for free; healthcare providers pay to list and advertise their available appointment slots. Historically the platform was sold on a paid subscription basis to medical practices; in January 2019 the company announced a shift in some markets from subscription pricing to a per-referral fee. The company's current provider pricing has three tiers: a free Basic tier offering a verified Zocdoc profile and direct booking on a practice's own listings with real-time EHR-synced availability; a Growth tier charging a new-patient booking fee with no monthly platform fee, adding Marketplace exposure, distribution to partner sites and optional Sponsored Results; and an Advanced tier charging a new-patient booking fee plus $250 per provider per month, adding customized website scheduling, automated outbound patient campaigns and the Zo AI phone assistant.
Revenue comes from healthcare providers through a mix of new-patient booking (referral) fees, per-provider monthly subscription fees for advanced practice solutions, and paid visibility products such as Sponsored Results. The 2019 move from subscription to referral-fee pricing in some markets drew concern from some doctors that a per-customer fee would be harder to recoup unless patients returned for additional visits.
Traction
Zocdoc grew from a Manhattan dentist-booking service to over 30 cities between 2011 and 2013; by 2014 it covered 40% of US markets across 2,000 cities with five million users booking appointments monthly, and by 2017 reported more than six million monthly patients. The company said its 2019 pricing change produced a 50% increase in providers on the platform in transitioned states and that revenue grew 35% year over year in 2019. Its provider site cites 250,000+ providers, 200+ specialties, 175+ integrations and coverage in 50 states, and it reports that a surge in bookable Dental Care Alliance providers drove a 750% increase in new patient bookings. A Zocdoc-run COVID-19 vaccine scheduler built with Mount Sinai booked over 100,000 appointments, peaking at 100 bookings per minute.
Latest developments
Zocdoc's provider platform is organized into three solutions - Bookable Profiles / Care Access Network, the Zocdoc Marketplace, and Practice Solutions - with tiered Basic, Growth and Advanced pricing. Zo, an AI phone assistant intended to automate 24/7 phone scheduling, and automated outbound patient campaigns are listed as coming soon, and part of the Care Access Network offering is delivered in partnership with WellHive. In 2024 the company launched an advanced partner program for EHR and practice management vendors.
▸Full profile — market position, technology, go-to-market, geography, history, risks & controversies
Market position
Zocdoc positions itself as a nationwide online healthcare scheduling marketplace addressing US appointment access problems: the average patient appointment wait time in 2022 was up 8% versus 2017 and 24% versus 2004, new patients waited roughly 26 days for an appointment, and the US is projected to face a shortage of 21,000-55,000 primary care physicians by 2033. By August 2015 it was valued at $1.8 billion, described at the time as the third-highest valuation for a New York startup.
Zocdoc combines a consumer-facing search and booking marketplace with real-time calendar synchronization into providers' existing EHR and practice management systems, so availability stays accurate across the marketplace, the practice's own website and third-party listings such as search engines, review sites and insurance directories from a single integration. Filters for accepted insurance plans, verified patient reviews and estimated wait times are intended to make provider selection self-service for patients, while for providers the platform is positioned as reducing no-shows and filling last-minute cancellations.
Technology
The platform synchronizes real-time provider availability across Zocdoc's marketplace and external listings through direct integrations with more than 175 EHRs, practice management systems and custom scheduling solutions. It offers online check-in and intake forms (added in late 2012), automated appointment reminders, verified review collection, performance analytics, and a HIPAA-compliant video visit service launched in May 2020. Zocdoc began implementing an AI-based insurance verification tool as early as 2017 and has announced Zo, an AI phone agent for automated phone scheduling.
Go-to-market
Early growth came from direct, in-person sales, with co-founder Cyrus Massoumi going door to door with a PowerPoint to persuade New York physicians to list unfilled appointment times. The company now uses a self-serve funnel with a free entry tier for individual practices and an enterprise demo track for large provider groups, alongside distribution partnerships that make provider availability bookable from search engines, review sites and insurance directories. Integrations with 175+ EHR and practice management systems, plus an advanced partner program for EHR and PM vendors launched in 2024, support provider onboarding.
Two sides: US consumers seeking medical, dental and telehealth appointments, and healthcare providers ranging from solo and independent private practices to large medical groups, MSOs and DSOs, corporate practices and health systems.
Geography
United States only; headquartered in New York City, with operations that have also been recognized in Arizona. Provider coverage is cited across all 50 states.
History
Launched at the TechCrunch40 conference in September 2007 as a booking service for Manhattan dentists, Zocdoc raised an initial $3 million from Khosla Ventures in early 2008 and added angel investments from Jeff Bezos and Marc Benioff that year, funding expansion into more cities and provider types. It reached over 30 cities by 2013 and 2,000 cities by 2014. Later rounds involving Goldman Sachs, Ron Conway's SV Angel and Founders Fund produced a $1.8 billion valuation in August 2015. In November 2015 Massoumi was replaced as CEO by co-founder Oliver Kharraz, previously COO. In January 2019 Zocdoc changed pricing in some markets from subscription to referral fees. During the COVID-19 pandemic it launched telehealth video visits (May 2020) and vaccine scheduling tools, including a pilot with Mount Sinai Hospital and a partnership with the city of Chicago. In 2024 it launched an advanced partner program for EHR and practice management vendors.
Risks & controversies
In 2020, founder and former CEO Cyrus Massoumi filed a lawsuit against Nick Ganju, Oliver Kharraz and Netta Samroengraja alleging they used "an elaborate series of lies and deceptions" to take control of the company from him. The 2019 shift from subscription pricing to per-referral fees also drew criticism from some physicians who said a per-customer fee would be harder to recoup unless patients returned for repeat visits.
Compiled by commissioned research from 4 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 · 5
by search overlapCompanies competing with Zocdoc for the same Google search keywords, organic and paid, via search-intersection analysis.
Timeline · 10
launches, deals, and filingsZocdoc launched an advanced partner program aimed at EHR and PM software vendors.
Zocdoc partnered with the city of Chicago to let residents find and book COVID-19 vaccine appointments in a central location; similar services were offered in states including Alabama, Illinois, Kansas and Massachusetts.
Zocdoc launched a video service enabling providers on the platform to see patients remotely during the COVID-19 pandemic.
Zocdoc built a free vaccine scheduling program integrated into Mount Sinai's website; the scheduler booked over 100,000 appointments, peaking at 100 per minute.
Zocdoc announced a shift from subscription pricing to per-referral fees in certain markets; the company said this drove a 50% increase in providers in transitioned states, while some doctors raised concerns about recouping per-patient fees.
Co-founder Oliver Kharraz, previously COO since launch, became CEO in place of founder Cyrus Massoumi.
Zocdoc added a check-in feature allowing patients to complete medical forms online ahead of their appointment.
Cyrus Massoumi won the Forbes Boost Your Business Award for Zocdoc.
Amazon founder Jeff Bezos and Salesforce CEO Marc Benioff invested in Zocdoc in 2008, helping fund expansion into additional cities and provider types.
The service was announced at the TechCrunch40 conference (now TechCrunch Disrupt), initially serving dentists in Manhattan.
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 · 4
primary sources listed
- Zocdoc for Providers | Get More New Patientszocdoc.com · web
4 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Zocdoc do?
- Zocdoc runs an online marketplace where US patients find in-network doctors and dentists and book in-person or telehealth appointments.
- Who founded Zocdoc?
- Zocdoc was founded by Cyrus Massoumi, Oliver Kharraz, Nick (Nikhil) Ganju.
- Who are Zocdoc's investors?
- Zocdoc's investors include Blue Collective, Disruptive Ventures, Founders Fund, Francisco Partners, JumpStart Equity, Khosla Ventures, Manhattan Venture Partners, Open Field Capital and 4 more.
- How much funding has Zocdoc raised?
- Zocdoc has disclosed $80.3M raised across 2 of its 5 known rounds.
- Where is Zocdoc headquartered?
- Zocdoc is headquartered in New York, US.



