Medical Device Classification Advisory: Understanding Class A, B, C and D Under CDSCO
Ask ten manufacturers how their device got classified, and a fair number will say they matched it to whatever example looked closest on someone else’s website. That’s not how CDSCO medical device classification works, and it’s exactly the shortcut that gets an application sent back months later, once a reviewer notices the mismatch.
Here’s what most people get wrong about medical device classification: it isn’t a label you pick because it sounds close enough. CDSCO classifies devices against defined rules, based on intended use and risk: how the device is used, how long it stays in contact with the body, and whether it’s active or passive. Guess wrong, and everything downstream is wrong with it. That includes the form you file, the authority that reviews it, and the audit your site faces.
Let’s walk through how classification actually works in India, who needs a classification advisory before they file anything else, and where this trips people up.
What Medical Device Classification Actually Determines
Classification isn’t a formality that happens after your regulatory plan is set. It is your regulatory plan, from the first decision. Under India’s Medical Device Rules, 2017, every device is sorted into one of four risk-based classes: A, B, C, or D. That single decision determines which licensing authority reviews your application, which form you file, how much technical documentation you submit, and how closely your site is scrutinised. It also applies at the registration stage, because your device’s class is part of what you declare when you list it.
This is a risk-based system aligned with the principles of the Global Harmonization Task Force (GHTF, whose work now continues under the IMDRF), the same general logic used across several major device markets. The specific rules and boundaries are India’s own.
You’ll see this topic described in several ways: classifications of medical devices, MDR device classification, medical device category classification, or CDSCO medical device classification. They all refer to the same framework. In this article, “MDR” means India’s Medical Device Rules, 2017, not the European regulation that shares the abbreviation. The wording varies depending on whether someone is emphasising the regulation, the authority, or the device category.
How CDSCO Classifies Devices
CDSCO’s Central Licensing Authority classifies devices and publishes risk classification lists by device category. Each entry gives a device name, its risk class, and a general intended use. These lists are issued as guidance for applicants and are revised from time to time.
So your starting point is to check your device against CDSCO’s current published lists, not to rely on its class in another country or on a similar-looking product. Devices other than IVDs are classified under Part I of the First Schedule of the Rules. IVDs are classified under Part II. Where your device isn’t listed or sits at the edge of two classes, the underlying criteria below explain how a class is reached, and you can seek CDSCO’s classification.
Who Needs a Classification Advisory
Manufacturers preparing their first CDSCO filing. If you haven’t confirmed your device’s class, your license route, documentation burden and timeline are all still open questions. This step should come before you draft anything else.
Importers bringing a new device into India. A device’s class doesn’t carry over automatically from another market. A lower-risk category elsewhere can land in a different class under India’s rules. Importers who assume otherwise often find out during CDSCO review.
Manufacturers with a borderline or ambiguous device. Some products sit at the edge between two classes, such as a device with more than one intended use or one that doesn’t match existing examples. A wrong assumption costs the most time here.
In Vitro Diagnostic (IVD) manufacturers. IVDs follow a related but separate classification framework, and a diagnostic product needs its own risk determination.
The Legal Basis: Medical Device Rules, 2017
Medical devices are regulated as “drugs” under the Drugs and Cosmetics Act, 1940, brought within that definition through notifications under Section 3(b)(iv). The Medical Device Rules, 2017, in force since 1 January 2018, set out the classification framework: the criteria, the four risk classes, and how they connect to licensing. CDSCO classifies devices under Rule 4 of the Rules, and its published lists can be revised, so always work from the current version.
Class A, B, C and D: What Separates Them
- Class A: low risk. Minimal potential for harm. Examples include elastic bandages and tongue depressors.
- Class B: low-to-moderate risk. More risk than Class A, which can include some short-term or active devices. Examples include nebulizers and blood glucose monitors.
- Class C: moderate-to-high risk. Devices that are more invasive, used for longer, or involved in more critical care. Examples include infusion pumps and CT or MRI equipment.
- Class D: high risk. The highest potential for harm, typically sustained contact with critical body systems or life support. Examples include heart valves and pacemakers.
These labels only mean something once you know why a device lands in one class over another.
The Criteria Behind a Classification
Duration of body contact. Transient use (normally under 60 minutes), short-term use (up to 30 days), and long-term use (beyond that). Longer contact generally pushes a device toward a higher class, all else being equal.
Degree of invasiveness. A device on the spectrum from non-invasive, to invasive through a body orifice, to surgically invasive, carries different risk. One that penetrates tissue is not comparable to one that touches intact skin.
Active versus passive. Whether a device depends on an external energy source, such as electrical power, changes how it’s assessed. Active devices that deliver energy to or from the body carry extra considerations.
Body system contact. Contact with the central nervous system or cardiovascular system is treated far more cautiously than contact with intact skin.
When a device meets more than one criterion, which happens often, the general rule is to apply the higher, more conservative class.
What a Class Means for Your Licensing and Audit
| Class | Manufacturing route | Audit approach |
| A | State Licensing Authority: Form MD-3, license on Form MD-5 | Non-sterile, non-measuring devices: license can be granted first, with the site audited afterwards. Sterile or measuring devices: Notified Body audit before grant |
| B | State Licensing Authority: Form MD-3, license on Form MD-5 | Notified Body audit before grant |
| C and D | Central Licensing Authority: Form MD-7, license on Form MD-9 | Inspection before grant |
Imports go through the Central Licensing Authority on Form MD-14, with the license granted on Form MD-15. Confirm whether your Class A device qualifies for any simplified path.
Licensing applied in phases for previously non-notified devices: from 1 October 2022 for Class A and B, and from 1 October 2023 for Class C and D. Both dates have passed. A manufacturing or import license is therefore required, and the class decides which route applies. Procedures are updated from time to time, so confirm the current process for your class before filing. CDSCO may also need to confirm your classification before your state authority can act.
A Note on In Vitro Diagnostic (IVD) Classification
IVDs, meaning test kits, reagents, and instruments used to examine specimens outside the body, are classified using a parallel A-to-D framework, but the criteria differ. Instead of invasiveness or body contact, IVD classification looks at the risk a test result poses to individual health and to public health. A test with serious consequences if it gets the result wrong sits in a very different class from a routine general-use test. If your product is a diagnostic test or instrument, this IVD framework applies, not the general criteria above.
What Happens If You Get the Classification Wrong
Misclassification isn’t a paperwork inconvenience. It cascades. File under the wrong class and you may submit to the wrong licensing authority, use the wrong form, or assemble documentation that doesn’t match your device’s real risk class. Each mistake means restarting the review, not adjusting it mid-way.
There’s also a compliance dimension. Medical devices are legally treated as drugs under the Drugs and Cosmetics Act, 1940. Manufacturing or importing a device under the wrong class, particularly where it means operating without the license your device actually needs, can expose you to the Act’s penalty provisions, including Section 27. Getting classification right at the start keeps your whole filing legally sound.
Information We Need to Assess Your Device
A classification assessment is built from specific information. Before we can assess your device, we typically need:
- A clear description of the device and its intended use
- The mode and duration of contact with the patient’s body, where applicable
- Whether the device is invasive, non-invasive, or implantable
- Whether the device is active (uses an external energy source) or passive
- The body system or tissue the device contacts, if any
- Materials of construction and any sterilisation method used
- Technical specifications or a product data sheet
- Details of any similar device already classified or approved in India or another market
The more precise this information, the faster and more defensible the determination.
Frequently Asked Questions
What’s the difference between Class A, B, C and D medical devices?
The classes represent increasing risk, based on factors such as duration of body contact, invasiveness, and whether the device is active or passive. Class A carries the lowest risk and Class D the highest.
Who decides my device’s classification?
CDSCO classifies devices and publishes risk classification lists. Your starting point is to check your device against those lists. Where it isn’t listed or is unclear, the criteria apply, and you can seek CDSCO’s classification.
What if my device doesn’t clearly fit into one class?
Where a device meets the criteria for more than one class, the general approach is to apply the higher, more conservative class. For genuinely ambiguous cases, seeking CDSCO’s classification is more reliable than assuming.
Are IVDs classified the same way as other medical devices?
No. IVDs follow their own A-to-D framework, based on the risk a test result poses to individual and public health, not invasiveness or body contact.
Does my device’s classification in another country carry over to India?
Not automatically. India applies its own classification rules, and a device classified one way elsewhere can land in a different class here.
What does my class decide?
It decides which authority reviews your application, which form you file, what documentation you need, and how your site is audited.
What happens if I file under the wrong class?
Your application will typically be returned for correction, which can mean a different form, a different licensing authority, or different documentation, and your timeline restarts. If it results in operating without the right license, you’re also exposed to penalties under the Act.
Do I need a medical device classification consultant, or can I do it myself?
You can try, but borderline devices and multi-criteria cases are where self-assessment most often goes wrong. A medical device classification consultant familiar with current CDSCO practice can catch these before they become a rejected filing.
How long does a classification advisory take?
It depends on how well documented your device is. A device with clear specifications and intended-use documentation can usually be assessed quickly. Borderline devices take longer, particularly if CDSCO’s classification has to be sought.
Get Your Device Classified Correctly With EXIM ADVISORY Before You File Anything Else
A wrong classification doesn’t just slow your paperwork. It means refiling under the right form, the right authority, and the right documentation from scratch, with your timeline reset each time. Talk to EXIM ADVISORY about your medical device classification today, and get it right before it costs you your filing window.