Medical Device 510(k) Submission Guide

What Is a 510(k) Premarket Notification?

A 510(k) is a premarket notification submitted to FDA to demonstrate that a new medical device is substantially equivalent to a legally marketed predicate device. Most Class II devices require 510(k) clearance before they can be marketed in the United States. The typical FDA review takes 3-6 months, though complex submissions may take longer. For official guidance, see FDA's How to Study and Market Your Device page.

The 510(k) program, named after Section 510(k) of the Federal Food, Drug, and Cosmetic Act, is the most common pathway for medical devices to reach the US market.

Unlike premarket approval (PMA), which requires clinical trials proving safety and effectiveness, 510(k) clearance requires demonstrating "substantial equivalence" to an existing device. This allows devices to reach the market more quickly while still ensuring safety.

Key 510(k) Concepts

When Is a 510(k) Submission Required?

A 510(k) submission is required in several situations:

• New market introduction: When introducing a device to the US market for the first time (unless exempt)
• Significant modification: When making changes to a cleared device that could significantly affect safety or effectiveness
• New intended use: When changing the intended use of a cleared device

510(k) Not Required When:

• Your device is Class I or Class II exempt (check FDA database)
• You're making modifications that don't significantly affect safety or effectiveness
• Your device qualifies for De Novo classification pathway
• Your device requires PMA (most Class III devices)

How Does the FDA Device Classification System Work?

FDA classifies medical devices into three categories based on risk level. Understanding classification is essential for determining the correct regulatory pathway.

Class I - Low Risk

Class I devices pose minimal potential for harm. Examples include bandages, tongue depressors, and manual stethoscopes. Most Class I devices are exempt from 510(k) requirements, though they must still meet general controls:

• Establishment registration
• Device listing
• Good Manufacturing Practice (Quality Management System Regulation / QMSR)
• Proper labeling
• Adverse event reporting

Class II - Moderate Risk

Class II devices pose moderate risk and typically require 510(k) clearance. Examples include powered wheelchairs, pregnancy test kits, and surgical drapes. Class II devices must meet:

• All general controls (same as Class I)
• Special controls specific to the device type (performance standards, postmarket surveillance, patient registries, etc.)

Class III - High Risk

Class III devices are life-sustaining, life-supporting, or present a potential unreasonable risk. Examples include pacemakers, implantable defibrillators, and heart valves. Most Class III devices require Premarket Approval (PMA), not 510(k), though some legacy Class III devices can use the 510(k) pathway.

What Is Substantial Equivalence in a 510(k)?

The core of a 510(k) submission is demonstrating substantial equivalence (SE) to a predicate device. FDA will find your device substantially equivalent if:

1. Same intended use: Your device has the same intended use as the predicate
2. Same technological characteristics: Your device has the same technological characteristics as the predicate, OR
3. Different but equivalent: Your device has different technological characteristics but data demonstrates it is as safe and effective

Selecting a Predicate Device

Choosing the right predicate device is critical to your 510(k) success. Our Predicate Finder tool can help you search FDA's database for suitable predicates. Consider these factors:

• Intended use match: The predicate should have the same intended use as your device
• Technological similarity: The closer your technology to the predicate, the simpler your submission
• Clearance pathway: Ensure the predicate was cleared via 510(k), not PMA or De Novo
• Recent clearance: More recent predicates may better reflect current standards
• Available information: Publicly available 510(k) summaries can inform your comparison

Multiple Predicates

You can use multiple predicate devices if needed. For example, you might use one predicate for intended use comparison and another for technological characteristics. This approach is sometimes called "split predicates" and can be acceptable when properly justified.

What Are the Different 510(k) Submission Types?

FDA accepts three types of 510(k) submissions, each suited to different situations:

Traditional 510(k)

The standard submission format for demonstrating substantial equivalence. Includes complete device description, performance data, labeling, and other required sections. Most 510(k) submissions are traditional format.

Abbreviated 510(k)

Uses guidance documents, special controls, or recognized consensus standards to streamline the submission. Can significantly reduce the submission size when applicable. Requirements include:

• Declaration of conformity to recognized standards, or
• Compliance with FDA guidance document for the device type, or
• Compliance with special controls established for the device

Special 510(k)

For manufacturers modifying their own cleared devices when the modification does not alter the device's intended use or fundamental scientific technology. Special 510(k)s are typically reviewed within 30 days and require:

• Existing quality management system
• Design control documentation showing risk analysis
• Summary of design verification and validation

How Do I Prepare a 510(k) Submission?

A complete 510(k) submission includes multiple sections. Here are the key components:

Required Sections

What Testing Is Required for a 510(k)?

Testing requirements vary based on the device type and the differences between your device and the predicate. Common testing categories include:

Performance/Bench Testing

Laboratory testing demonstrating your device performs its intended function. This may include:

• Accuracy and precision testing
• Mechanical testing (strength, durability)
• Electrical safety testing
• Environmental testing (temperature, humidity)
• Shelf life/stability testing

Biocompatibility Testing

For devices contacting the body, biocompatibility testing per ISO 10993 is typically required. Testing depends on the nature and duration of body contact:

• Cytotoxicity testing
• Sensitization testing
• Irritation testing
• Systemic toxicity (for implants and prolonged contact)
• Other tests based on contact type and duration

Electrical Safety and EMC

For electrically powered devices, safety and electromagnetic compatibility testing is required:

• IEC 60601-1 (electrical safety)
• IEC 60601-1-2 (electromagnetic compatibility)
• Applicable collateral and particular standards

Software Validation

Devices containing software must demonstrate software quality and validation. FDA categorizes software by level of concern:

• Minor: Failures unlikely to cause injury
• Moderate: Failures could cause non-serious injury
• Major: Failures could cause serious injury or death

Clinical Data

Clinical data may be required when performance testing alone cannot demonstrate substantial equivalence. Clinical data options include:

• Clinical studies conducted for your device
• Published literature supporting your device
• Clinical experience from similar devices

How Long Does the FDA 510(k) Review Take?

Understanding FDA's review process helps you plan realistically and respond effectively to questions.

Submission Acceptance Review

Within 15 days of receipt, FDA determines if your submission is administratively complete (Acceptance Review). Missing elements result in a Refuse to Accept (RTA) letter, requiring you to resubmit with missing information.

Substantive Review

Once accepted, FDA begins substantive review of your submission. The FDA performance goal is to complete review within 90 days for traditional 510(k)s, though actual times vary.

Additional Information Requests

During review, FDA may request additional information (AI). You'll receive an AI letter with specific questions. The review clock pauses until you respond. Common AI topics include:

• Clarification of device description or intended use
• Additional performance data
• More detailed predicate comparison
• Labeling modifications

Decision Letters

FDA will issue one of three decisions:

• Substantially Equivalent (SE): Your device is cleared for marketing
• Not Substantially Equivalent (NSE): Your device cannot use the 510(k) pathway
• Additional Information Needed: More information required before a decision

Why Do 510(k) Submissions Get Rejected?

Understanding why 510(k)s fail helps you avoid common pitfalls:

What Are the Post-Clearance Requirements After 510(k)?

510(k) clearance is not the end of your regulatory obligations. Post-clearance requirements include:

Establishment Registration & Device Listing

Before marketing your device, you must register your establishment and list your device with FDA. Registration is annual (October 1 - December 31) and requires payment of annual user fees. Visit our medical device registration service or explore the medical devices industry page for a full overview.

Quality Management System Regulation (QMSR)

As of February 2, 2026, the Quality Management System Regulation (QMSR) replaced the former Quality System Regulation (QSR) under 21 CFR Part 820 (as amended). QMSR aligns FDA requirements with ISO 13485:2016. You must maintain a quality management system that meets these updated requirements. Key elements include:

• Design controls
• Production and process controls
• Corrective and preventive actions (CAPA)
• Document and record controls
• Complaint handling
• ISO 13485:2016 alignment

Adverse Event Reporting

You must report adverse events and device malfunctions to FDA through the Medical Device Reporting (MDR) system:

• Deaths: Report within 30 days
• Serious injuries: Report within 30 days
• Malfunctions: Report if could cause death or serious injury

Unique Device Identification (UDI)

Most devices must bear a unique device identifier and be listed in the FDA's Global Unique Device Identification Database (GUDID). UDI requirements are phased in based on device class. Use our UDI Lookup tool to search the GUDID database and our Device Product Finder to identify your product classification.

What Is the QMSR Transition and How Does It Affect 510(k) Holders?

On February 2, 2026, the Quality Management System Regulation (QMSR) officially replaced the legacy Quality System Regulation (QSR). This is the most significant change to medical device quality requirements in nearly three decades. QMSR aligns FDA's quality system framework with ISO 13485:2016, the internationally recognized standard for medical device quality management systems.

What Changed

Under QMSR (21 CFR Part 820, as amended), FDA now incorporates ISO 13485:2016 by reference rather than maintaining a separate, US-only quality system standard. This means:

• ISO 13485:2016 compliance is now the baseline: Device manufacturers must comply with ISO 13485:2016 requirements as incorporated into the regulation
• Design and development controls: QMSR retains FDA-specific requirements for design controls, which go beyond what ISO 13485 alone requires
• Complaint handling and MDR: FDA-specific requirements for complaint handling and Medical Device Reporting remain in force alongside ISO 13485
• Purchasing controls: QMSR maintains FDA-specific purchasing control requirements

Impact on 510(k) Holders

If you hold an existing 510(k) clearance, the QMSR transition requires you to update your quality management system to align with ISO 13485:2016. Key actions include:

• Conduct a gap analysis comparing your current QMS against ISO 13485:2016 requirements
• Update quality system documentation, procedures, and records to reflect the new regulatory language
• Ensure your design controls meet both ISO 13485 and the additional FDA-specific requirements retained in QMSR
• Train personnel on the updated requirements and procedural changes

Frequently Asked Questions