Diagnostic Imaging Centers in the US: Market Size, Businesses & Forecast 2026

The diagnostic imaging centers industry in the US consists of independent, outpatient facilities primarily engaged in producing medical images on referral from healthcare practitioners. The industry is currently moving toward higher technology integration and structural expansion driven by shifts to low-cost outpatient care settings. For instance, according to the U.S. Federal Register citing U.S. Economic Census data, there were 3,556 firms operating in this industry sector, indicating a highly decentralized and localized market. Furthermore, established public operators like RadNet, Inc. reported an outpatient imaging center segment revenue of 1,988.2 million USD in 2025 (RadNet, Inc. Form

Industry snapshot

Key public data points

Historical & forecast

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What does the Diagnostic Imaging Centers in the US industry cover?

This U.S. industry encompasses freestanding medical facilities that are primarily dedicated to providing medical diagnostic imaging services directly to patients, generally upon a referral from a licensed health practitioner. The core service offering excludes acute inpatient clinical setups and instead focuses entirely on non-invasive outpatient diagnostics. Modalities utilized within these centers include computed tomography (CT), magnetic resonance imaging (MRI), positron emission tomography (PET), digital X-rays, mammography, and ultrasound.

• •Centers specialize in outpatient-based anatomical and functional imaging procedures.
• •Operations typically exist as independent diagnostic testing facilities (IDTFs) separate from large general medical hospitals.
• •Core technology offerings are classified distinctly under specialized laboratory and clinical imaging service groups.

Who operates in the industry and how is it structured?

The structural landscape of the outpatient diagnostic imaging centers market remains fragmented, composed of thousands of local and regional operators alongside select corporate networks. While small practices make up the vast majority of firms, multi-regional providers are expanding their footprints through strategic joint ventures with regional health systems and medical groups. The capital-intensive nature of advanced radiology equipment introduces high fixed barriers to entry for independent entrants.

• •According to U.S. Economic Census figures published in the Federal Register, 3,233 firms out of 3,556 total operators generated less than $10 million in annual revenue.
• •Small businesses, as defined by the Small Business Administration (SBA), are classified as firms having annual receipts of $16.5 million or less.
• •Regional consolidation is frequently executed via standalone network acquisitions to scale operational efficiency and negotiate commercial payor contracts.

What drives demand in the industry?

The persistent demand floor for outpatient diagnostic imaging is fundamentally anchored in demographic aging patterns and the high prevalence of complex chronic diseases. Outpatient migration is further driven by cost-containment efforts from both commercial insurers and public programs that favor site-neutral payment policies over expensive hospital departments. Additionally, clinical recommendations for routine preventative screening continue to expand the long-term volumes of diagnostic protocols.

• •According to the Centers for Disease Control and Prevention (CDC), nearly 6 in 10 U.S. adults live with at least one chronic disease requiring clinical monitoring.
• •Increased screening guidelines for oncology, cardiovascular conditions, and neurological monitoring sustain procedural growth.
• •Site-neutral economics incentivized by commercial health plans encourage the redirection of stable patients toward freestanding facilities.

Who are the notable companies in the industry?

Competition in the US marketplace is primarily driven by geographic density, referral network alliances, technological capabilities, and service turnaround times. The landscape consists of a mix of prominent public operators, heavily capitalized private groups, and diversified medical services entities. Operators continually upgrade to advanced multi-slice CT and high-field MRI systems to remain competitive in major metropolitan clusters.

• •RadNet, Inc., a prominent public outpatient imaging operator, reported total company revenue of 2,040.2 million USD for the full year 2025.
• •Akumin Inc. operates a widespread national network providing outpatient diagnostic imaging and clinical radiation therapy solutions.
• •Shields Health Care Group stands as a significant regional partner offering outpatient MRI, PET/CT, and ambulatory surgery solutions across the Northeast.
• •SimonMed Imaging LLC functions as one of the largest outpatient physician-led imaging providers across multiple states.

What are the recent trends and outlook?

The industry is experiencing a rapid technological transition defined by the introduction of artificial intelligence (AI) and machine learning software suites into clinical radiology workflows. These digital tools improve diagnostic precision, accelerate scan times, and optimize workflow productivity to combat an industry-wide shortage of clinical radiologists. The outlook remains favorable as large multi-site networks expand their dedicated digital health and teleradiology segments.

• •RadNet, Inc. reported that full-year 2025 revenue for its Digital Health segment reached 92.7 million USD, highlighting accelerated AI integration.
• •The U.S. Food and Drug Administration (FDA) had authorized more than 950 AI/ML-enabled medical devices, heavily concentrated within radiology applications.
• •Advanced clinical focus is rapidly incorporating theranostics-led PET/CT workflows to provide unified diagnosis and targeted therapy monitoring.

How is the industry regulated?

Operators face strict oversight spanning corporate practices, patient safety protocols, and public insurance reimbursement frameworks. Compliance mandates dictate equipment certification requirements, direct clinical supervision standards for contrast administration, and privacy regulations regarding health information. Furthermore, fluctuations in the annual Medicare Physician Fee Schedule directly influence profit margins and regional pricing structures.

• •Centers must maintain structural compliance with the Health Insurance Portability and Accountability Act (HIPAA) to secure protected patient health data.
• •Reimbursement rates are determined annually via the Centers for Medicare & Medicaid Services (CMS) Physician Fee Schedule adjustments.
• •Facilities frequently adhere to credentialing protocols established by the American College of Radiology (ACR) to secure commercial insurer coverage.

Government, statistical and trade sources used for this Claight analysis.

• RadNet, Inc. SEC Form 10-K Annual Report 2025 ·
• U.S. Federal Register (Promoting Telehealth in Rural America / U.S. Economic Census 2017 Data Release 2024) ·
• Centers for Disease Control and Prevention (CDC) Chronic Conditions Report 2025 ·
• U.S. Food and Drug Administration (FDA) AI/ML-Enabled Medical Devices List 2024 ·
• U.S. Census Bureau North American Industry Classification System (NAICS) 2022