Comstar

What Comstar does

Comstar is a privately held healthcare revenue cycle management (RCM) company founded in 1984 and headquartered in Rowley, Massachusetts. It specializes exclusively in ambulance billing and related services for municipal and non-profit ambulance providers in the New England region, where it claims to be the largest such service organization. The company has been under the ownership and leadership of Rick Martin (Owner & CEO) since May 2000.

The company's product surface spans ambulance billing and insurance/Medicare claims processing as the core offering, supplemented by debt collection services, billing-process consulting, electronic Patient Care Report (ePCR) hosting, a patient-facing online bill-payment portal, an insurance information submission workflow, attorney record-request services, and a client services portal. Underlying technology is a cloud-based ambulance billing and claims-processing platform with integration into ChartSwap for attorney document exchange and a security posture aligned to HIPAA, ISO 27001, NIST 800-171 and NIST 800-53 (data encryption, multi-factor authentication, role-based access, intrusion prevention, third-party audits). The company handles client run volumes from 500 to 100,000 per year.

Comstar monetizes via transaction- or percentage-based fees on recovered insurance dollars, plus consulting fees, collections commissions and per-request fees for attorney document production. The go-to-market is sales-led through direct relationships with municipal and non-profit ambulance operators, supported by regional EMS trade-show presence and a phone-based customer-support line. The privately held company has 51–100 employees, claims 14 consecutive years of positive growth and profitability, and carries no outside institutional investors. In 2022 it suffered a data breach affecting approximately 349,255 residents, leading to a $515,000 multistate settlement with Connecticut and Massachusetts in January 2026 that mandates enhanced security controls and three years of annual security assessments.

Name

Comstar

Legal name

Comstar Ambulance Billing Service

Website

https://comstarbilling.com

Company type

Private

Founded year

1984

Operating status

Operating

Headcount range

51–100 employees

Short description

Comstar is a privately held, New England-based revenue cycle management firm that provides ambulance billing, collections, consulting and ePCR hosting for municipal and non-profit EMS providers, and has operated since 1984.

Ownership category

akta.pro rank

Headquarters

HQ city

Rowley

HQ country

United States

HQ region

North America

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. Ambulance Billing Services: Processing medical claims and sending bills on behalf of ambulance services. Revenue generated through transaction-based fees or percentage-based commissions on recovered insurance dollars.
2. Collection Services: Debt collection services for ambulance service clients to recover outstanding balances from patients.
3. Consulting Services: Consulting services to help ambulance services streamline insurance and Medicare billing processes.
4. Attorney Record Requests: Fees for providing billing documents and affidavits to law firms, varying based on complexity and state law requirements.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Core offering

Comstar provides specialized ambulance billing, collections, and insurance/Medicare reimbursement processing for municipal and non-profit ambulance services. The company also offers ePCR hosting, consulting, patient online bill payment, and attorney record request services. Comstar has been operating since 1984 and is positioned as New England's largest ambulance billing service organization.

Product overview

Comstar provides a unified ambulance billing service platform encompassing billing, collections, consulting, and ePCR hosting for municipal and non-profit ambulance services. The core offering is the Ambulance Billing Service, which processes medical claims, sends bills, and provides collection services. Supporting sub-products include a Patient Payment Portal for online bill payment, an Insurance Information Submission system, Attorney Record Request Services for legal document retrieval, and a Client Services Portal for ambulance companies to access claims and documents. The company has been in business since 1984 and serves as New England's largest ambulance billing service organization.

Differentiator

Problem solved

Functional benefit

Products and services

• Ambulance Billing Service Industry best-in-class ambulance billing, collections, and insurance/Medicare reimbursement processing for municipal and non-profit ambulance services.
• Collections Services Debt collection services provided to ambulance service clients to recover outstanding balances from patients.
• Consulting Services Advisory services to help ambulance services streamline insurance and Medicare billing while maximizing revenue recovery.
• ePCR Hosting Electronic Patient Care Report hosting service for ambulance services and EMS organizations.
• Patient Payment Portal Online bill payment platform allowing patients to make payments toward remaining ambulance transport balances and set up payment plans.
• Attorney Record Request Services Service for law firms and record retrieval companies to obtain patient billing statements related to Emergency Ambulance Transport, with documents exchanged via the ChartSwap platform.
• Client Services Portal Portal for ambulance companies and municipalities to access claim information, payment history, newsletters, ABN forms, and other downloadable documents.

Quantifiable outcome

• 14 consecutive years of positive growth and profitability

Named customers2 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature4 records

Partnerships

One partnership is on record.

• ChartSwapcoreTechnology or IntegrationComstar has partnered with ChartSwap, a web utility for exchanging billing documents, affidavits, and records via the Internet. Attorneys use ChartSwap to submit billing record requests and receive documents securely, bypassing unreliable postal service delivery.

Scale indicators5 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Waystar: Healthcare RCM technology platform covering claims management, patient payments, and analytics. Adjacent to Comstar's billing and collections offerings at a much larger, enterprise-software scale.
• RevSpring: Patient engagement, billing, and payments platform serving healthcare providers. Comparable to Comstar's patient payment portal and patient-facing collections workflows, though broader in scope across provider types.
• R1 RCM (including legacy Intermedix EMS business): Large-scale healthcare RCM platform that absorbed Intermedix's ambulance billing franchise. Overlaps with Comstar on EMS/ambulance claims and collections, but operates as a broad incumbent across many provider types.

Direct peers

• ZOLL Data Systems: Provides EMS software including ePCR, dispatch, and billing/claims management, overlapping directly with Comstar's ePCR hosting and billing offerings. Targets the same municipal and private ambulance customers.
• AIM EMS Software & Services: Provides ambulance billing software and services tailored to EMS providers, competing head-to-head with Comstar in claims processing, collections, and ePCR-adjacent workflows.
• MP Cloud Technologies: Cloud-based EMS billing, ePCR, and dispatch software vendor for ambulance services. Overlaps with Comstar across the EMS revenue cycle and target municipal/non-profit segment.
• EMS Management & Consultants (EMS|MC): One of the largest US third-party ambulance billing services, directly competing with Comstar for municipal and private EMS clients. Highly comparable on customer base, service offering, and transaction-fee revenue model.
• Coronis Health: Healthcare RCM provider with a dedicated ambulance/EMS billing practice (built in part via acquisitions of EMS billing specialists). Directly comparable services and customer base to Comstar.
• SafeQual (formerly Digitech Computer): Ambulance billing and EMS software provider serving public and private EMS agencies. Directly comparable in product scope (billing, ePCR, claims) and target customer profile to Comstar.
• Wittman Enterprises: Long-standing ambulance billing and consulting firm serving municipal and private EMS agencies. Closely comparable in service mix (billing, consulting, collections) and customer type to Comstar.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/comstar-inc.

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Comstar