What HLN Consulting does

HLN Consulting, LLC is a privately held health IT consulting firm founded in 1997 and headquartered in Mission Viejo, California (with a Palm Desert mailing address), employing between 11 and 50 staff. The firm specializes in public health informatics, with deep focus on Immunization Information Systems (IIS), Electronic Case Reporting (eCR), Clinical Decision Support (CDS), and Health Information Interoperability. Its core product is the Immunization Calculation Engine (ICE), an open-source Java-based web service that evaluates patient immunization history and generates recommendations aligned with ACIP and CDC guidelines across 22 vaccine groups, with integrations into IIS, EHR, PHR, and HIE systems.

The business operates on a professional services and managed services model rather than software licensing: ICE is distributed open-source with no license fee, while HLN monetizes through consulting engagements, technical support, configuration, hosted-service offerings, and the new CDS Insight testing platform (launched April 2026). Go-to-market is enterprise field sales executed through government procurement channels — the firm holds the GSA Multiple Award Schedule, California CMAS IT, Connecticut Covendis MSP/VMS, and Minnesota MNSITE2 vehicles — and engages clients via sponsorships and presentations at CSTE, AIRA, HIMSS, and NACCHO conferences.

HLN serves federal, state, local, and tribal public health agencies (named clients include the New York City Department of Health, Rhode Island Department of Health, Minnesota Department of Health, and Virginia Department of Health) and secondary segments such as healthcare providers and IIS operators. Revenue is not publicly disclosed, and the firm has no disclosed funding rounds, parent company, or institutional investors. Leadership is concentrated under President Dr. Noam Arzt, and the firm maintains an active open-source community via the ICE Advisory Group of 30+ external experts.

Name

HLN Consulting

Legal name

HLN Consulting, LLC

Website

https://hln.com

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

11–50 employees

Short description

HLN Consulting is a private health IT consulting firm specializing in public health informatics, serving federal, state, and local government health agencies with open-source clinical decision support (ICE), IIS modernization, and interoperability consulting.

Ownership category

akta.pro rank

Product category

Public Health Informatics Consulting

NAICS

Management Consulting Services (54161)

SIC

Services-Computer Programming Services (7371), Services-Management Consulting Services (8742)

akta.pro primary industry

Interoperability Standards, Profiles & Implementation (HL7/FHIR/IHE) (HLACABAA)

akta.pro secondary industry

HIE Platforms & Network Services (Community/Regional/National) (HLACABAB)

Keywords

• Public health informatics
• Immunization information systems
• Clinical decision support
• Health IT consulting
• Open source health software

Headquarters

HQ city

Palm Desert

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. Consulting Services: High-quality consulting services including strategic planning, software development, and project management for public health organizations. Services delivered through government contract vehicles.
2. ICE Technical Support & Configuration: Technical support including technical documentation, IT staff collaboration for integration, immunization schedule customization, and hosted service options for clinical and public health systems.
3. Open Source Software (No License Fee): The ICE software is open source with no license fee. Revenue is generated through support services, configuration, and hosted solutions rather than software licensing.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels6 records

Core offering

HLN Consulting is a health IT consulting firm that develops and maintains the open-source Immunization Calculation Engine (ICE) and provides strategic planning, software development, system migration, and public health informatics consulting services to government health agencies and healthcare providers. Its offerings center on immunization evaluation and forecasting, IIS modernization, FHIR-based interoperability, and clinical decision support for public health workflows.

Product overview

HLN Consulting offers a portfolio of public health informatics solutions centered on its open source Immunization Calculation Engine (ICE) software. ICE is the core product—a web service that provides clinical decision support for immunizations, evaluating patient history and generating recommendations. Supporting ICE is CDS Insight, an interactive testing and demonstration platform. HLN also provides IIS on FHIR solutions, system migration services, and consulting for data modernization. The company focuses on open source solutions that integrate with Immunization Information Systems (IIS), Electronic Health Records (EHR), and Health Information Exchanges (HIE).

Differentiator

Problem solved

Functional benefit

Brands

• ICE (Immunization Calculation Engine): Open source immunization forecasting and evaluation software providing clinical decision support for immunizations in IIS, EHR, and PHR systems.
• CDS Insight

Products and services

• Immunization Calculation Engine (ICE) Open source clinical decision support software that evaluates a patient's immunization history and generates appropriate immunization recommendations. Supports all routinely administered vaccines for children and adults, follows ACIP/CDC evidence-based clinical guidelines, and integrates with Immunization Information Systems (IIS), Electronic Health Records (EHR), Personal Health Records (PHR), and Health Information Exchanges (HIE).
• CDS Insight Interactive platform developed by HLN Consulting to support testing and demonstration of ICE logic. Enables users to create and run test cases, validate immunization logic, evaluate vaccination validity, and receive forecasting recommendations across vaccine groups.
• IIS on FHIR Solution that leverages proven methodology and tools to operationalize a new immunization information system using FHIR standards for interoperability, aimed at public health agencies modernizing their IIS infrastructure.
• Open Source Immunization Evaluation and Forecasting Open source solution designed to replace decommissioned immunization products with a well-supported system while adding useful enhancements for immunization evaluation and forecasting.
• System Migration Services Consulting service for ensuring successful system migration, including planning, stakeholder engagement, and system go-live support for public health systems.
• Public Health Informatics Consulting Services

Quantifiable outcome

• ICE listed in Digital Public Goods Alliance registry as innovative openly licensed technology (2021)
• +1 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

AI capability2 records

Feature4 records

Partnerships

One partnership is on record.

• Digital Public Goods Alliance (DPGA)coreOthers · 1 January 2021DPGA selected ICE (Immunization Calculation Engine) as an innovative openly licensed technology and listed it in their Digital Public Goods registry, recognizing its potential for improving immunization decision support globally.

Scale indicators5 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• STChealth (Scientific Technologies Corporation): Major commercial vendor of Immunization Information Systems and immunization solutions to state and local public health agencies; competes head-to-head with HLN in the IIS/interoperability space with similar government customers.
• Envision Technology Partners: Health IT consultancy focused on public health informatics, IIS modernization, and interoperability projects for state health departments; directly comparable in size, customer base, and service offering to HLN.
• Audacious Inquiry: Health information exchange and interoperability consulting firm serving public sector agencies on care coordination, event notification, and CMS interoperability programs; similar interoperability and FHIR expertise.
• CNSI: Health IT services company focused on state Medicaid and public-health data modernization, interoperability, and FHIR migration; comparable niche focus and customer base.

Broad incumbents

• Booz Allen Hamilton: Large federal contractor with a dedicated public-health practice supporting CDC modernization, immunization informatics, and health IT strategy; overlaps HLN's market from the incumbent side.
• Deloitte (Government & Public Services – Health): Big-four consultancy with a substantial federal/state health IT and public health modernization practice; competes for the same RFPs as HLN but with far broader portfolio.
• ICF International: Public-sector consulting firm with a dedicated health, science, and modernization practice serving CDC, HHS, and state public-health agencies on data modernization and informatics.
• Accenture Federal Services: Large federal systems integrator with public health and HHS modernization engagements; broader portfolio but overlaps HLN's federal health IT consulting work.
• Northrop Grumman Health IT: Federal health IT contractor supporting CDC, DoD, and VA on public-health and clinical informatics; competes for the same government health-IT awards.
• Mathematica: Public-policy research and consulting firm with deep public-health and immunization-policy work for HHS, CDC, and state agencies; competes indirectly for public-health modernization advisory work.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/HLNConsulting

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 HLN Consulting