What 4sigma does

4sigma GmbH is a German healthcare service provider founded in 1995 and headquartered in Oberhaching near Munich. The company operates on a B2B2C model, delivering telephone and digital health services to statutory and private health insurance companies (gesetzliche Krankenkassen and private Krankenversicherungen), employers, and other institutions, which then offer these services to their insured members and employees free of charge. 4sigma reaches approximately 10-11 million insured persons through its appointment service and 6+ million through video consultation, handling 300,000+ patient contacts per year.

Its core service portfolio comprises six integrated modules: Gesundheitshotline (telephone health advice), Videoberatung (video consultation on Patientus GmbH's peer-to-peer encrypted platform), Facharzt-Terminservice (specialist appointment coordination), Arzneimitteltherapiesicherheit (medication safety counseling), Disease-Management-Programme under §137f SGB V (chronic disease care for diabetes, COPD, asthma, coronary heart disease, heart failure, and breast cancer), and Patientenprogramme (structured health coaching). Services are delivered by qualified medical professionals via a DIN EN ISO 9001-certified Care Center operating with extended hours. The company integrates device-based monitoring (e.g., Bosch Vivatmo me FeNO home measurement pilot) and telemedicine technology, supported by a medical advisory board and partnerships with Fraunhofer IAO and GDD for compliance.

The business model is managed services B2B: health insurance companies and institutional clients pay for care management programs based on service scope, volume, and contract terms. The company maintains two Geschäftsführer (Horst-Günter Bohnenkamp and Ralf Pourie) and is privately held without external institutional investors.

Name

4sigma

Legal name

4sigma GmbH

Website

https://4sigma.de

Company type

Private

Founded year

1995

Operating status

Operating

Headcount range

11–50 employees

Short description

4sigma GmbH is a German B2B healthcare service provider founded in 1995, delivering telephone and digital health services to statutory and private health insurers, covering hotline, video consultation, specialist appointment coordination, medication safety, and disease management programs for insured members.

Ownership category

akta.pro rank

Product category

Healthcare Management Services

NAICS

Ambulatory Health Care Services (621), All Other Outpatient Care Centers (621498)

SIC

Services-Misc Health & Allied Services, Nec (8090), Services-Health Services (8000)

akta.pro primary industry

Virtual Specialty Care Programs (Payer-Sponsored) (HLALACAD)

akta.pro secondary industry

Chronic Condition Management & Remote Monitoring (e.g., diabetes, HTN) (HLALADAD)

Keywords

• Telephone health coaching
• Disease management programs
• Medication safety counseling
• Specialist appointment services
• Health insurance call center

Headquarters

HQ city

Oberhaching

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. B2B Healthcare Management Services: 4sigma operates on a B2B2C model where health insurance companies (statutory and private), employers, and healthcare institutions pay for care management services delivered to their insured members, employees, and customers. Services include hotline operations, appointment coordination, disease management programs, and patient coaching, with pricing based on service scope, volume, and contract terms.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

4sigma operates a certified (DIN EN ISO 9001, DIN 15838) telephone and digital health service center that delivers care management services on behalf of statutory and private health insurers as well as corporate clients. The service portfolio centers on a medical hotline (Gesundheitshotline), video consultation (Videoberatung), specialist appointment coordination (Facharzt-Terminservice), medication safety counseling (AMTS), disease management programs (DMP) for chronic conditions, and structured patient coaching programs delivered by physicians, pharmacists, and nurses.

Product overview

4sigma offers a modular platform of telephone and digital health services for patient and insured person support. The core portfolio consists of six integrated service modules: Gesundheitshotline (telephone health advice), Videoberatung (online video consultation), Facharzt-Terminservice (specialist appointment management), Arzneimitteltherapiesicherheit (medication safety counseling), Disease-Management (chronic disease care programs per §137f SGB V), and Patientenprogramme (health coaching for prevention and disease management). These services are delivered via telephone, video, and online channels by qualified medical professionals including doctors, pharmacists, and healthcare specialists. Additional offerings include smoking cessation counseling, vaccination consultation, and COVID-19 support services. The company serves statutory and private health insurers as external service provider, reaching approximately 10-11 million insured persons with its appointment and hotline services.

Differentiator

Problem solved

Functional benefit

Products and services

• Gesundheitshotline (Medical Hotline)
• Videoberatung (Medical Video Consultation)
• Facharzt-Terminservice (Specialist Appointment Service)
• Arzneimitteltherapiesicherheit (AMTS / Medication Safety Hotline)
• Disease-Management (DMP)
• Patientenprogramme (Patient Coaching Programs)
• Impfberatung (Vaccination Consultation)
• Corona/COVID-19 Hotline
• FeNO Home Measurement Pilot

Quantifiable outcome

• 300,000+ patient contacts per year
• +3 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature3 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• Mobil KrankenkassecoreStrategic or Co-development Partner · 1 January 20264sigma has partnered with Mobil Krankenkasse as an operational partner for conducting specialist appointment services. Since 2026, 4sigma manages appointment coordination for insured members, including searching for suitable practices near the member's location and arranging appropriate appointment times.
• Patientus GmbHcoreTechnology or Integration4sigma uses Patientus GmbH's web-based video consultation software. Patientus is the market leader for certified video consultations, providing technology that enables simple integration, high data security, and uncomplicated use - complementing 4sigma's certified consulting services.
• Allianz für Cyber-Sicherheit (ACS)minorOthers4sigma is a participant in the Alliance for Cyber Security (ACS), an initiative of the Federal Office for Information Security (BSI), supporting national cybersecurity efforts.
• Bundesverband Managed Care e.V. (BMC)minorOthers4sigma is a member of the Federal Association of Managed Care, a nationwide association for innovative system development in healthcare.
• Gesellschaft für Datenschutz und Datensicherheit (GDD)minorStrategic or Co-development Partner4sigma collaborates with the Society for Data Protection and Data Security (GDD), Germany's largest and most renowned association for data protection, to ensure compliance with data privacy requirements.
• Fraunhofer-Institut für Arbeitswirtschaft und Organisation IAOminorStrategic or Co-development Partner4sigma cooperates with Fraunhofer IAO, which focuses on current questions regarding the working person, supporting research and development in occupational health.
• Bosch Healthcare SolutionscoreStrategic or Co-development Partner4sigma partnered with Bosch Healthcare Solutions and a large private health insurer to pilot test the world's first FeNO measurement device for home use (Vivatmo me) in a practical setting. The project includes equipment with the novel device and 12-month telephone coaching.

Scale indicators7 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Sanvartis / Medgate Germany: Sanvartis was Germany's leading telephonic health-services provider for statutory health insurers before being integrated into Medgate, the Swiss telemedicine leader. Directly comparable B2B telephonic care model serving German payers.
• Medi24 AG: Swiss 24/7 telephone medical advice service operated by the Helsana Group. Closely comparable in offering medical hotline, triage, and care navigation on behalf of health insurance clients.
• Medgate AG: Swiss telemedicine operator providing telephone and video-based medical care to insured populations via partnerships with Swiss health insurers. Comparable B2B2C virtual care model to 4sigma.
• Vitaphone GmbH: German telemedicine and telemonitoring provider offering disease management and remote patient monitoring services to health insurers and integrated care contracts. Overlaps directly with 4sigma's DMP and chronic-condition offerings.

Emerging players

• GWQ ServicePlus AG: German service company owned by statutory health insurers providing shared services including care management programs. Adjacent model — payer-owned shared services — competing for similar German GKV contracts.
• TeleClinic GmbH: Germany-based digital telehealth platform offering video consultations and e-prescriptions to insurers, employers, and consumers. Competes with 4sigma's video consultation and specialist booking modules via a more digital-first stack.
• Zava (DrEd / Zava Med): European telehealth provider operating across DACH and other EU markets with asynchronous and synchronous remote consultations. Adjacent to 4sigma's telephonic and video health advice services but primarily D2C.

Broad incumbents

• Doctolib: European leader in online appointment booking and video consultation serving practitioners, patients, and increasingly health insurers. Competes most directly with 4sigma's Facharzt-Terminservice but operates at much broader scale.
• CompuGroup Medical SE: German-listed e-health incumbent providing physician software, telematics, and digital health services. Overlaps with 4sigma's care-management modules through its broader portfolio targeting German providers and payers.

Regional players

• SHL Telemedicine Ltd. Israel- and Switzerland-based telemedicine and remote-monitoring provider serving health insurers and patients. Comparable disease-management and telehealth monitoring proposition outside of Germany.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/4sigma_gmbh

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about 4sigma