Korea Class I Express Registration: 30-Day Pathway Explained

What Makes Class I Different

The Class I pathway differs from Class II–IV in three meaningful ways:

Aspect	Class I (Notification)	Class II–IV (Registration)
Pathway name	신고 (Notification)	허가 (Registration)
KGMP required	No	Yes
MFDS review	Administrative completeness	Full technical review
Typical clearance	30–60 days	60+ days (II), 6–12 months (III, IV)
Clinical evidence	Not required	Required (most cases)
Official fees	~~₩300K (~~$220)	₩4M+ ($3K+)
Foreign manufacturer KLH	Required	Required

When Class I Notification Is the Right Call

Class I notification fits well when:

Device is unambiguously Class I per Korean Medical Device Classification Code
Manufacturing site does not require KGMP for other Korean market products
Time-to-market is critical
Budget is constrained

It is the wrong call when:

Classification is borderline (Class I/II edge case) — MFDS may reclassify mid-review
Device is part of a product line where higher-class siblings need KGMP anyway
Distributor requires the prestige signal of full registration (rare, but happens)

The 30-Day Pathway: What Actually Happens

Day 0: Notification Filing

Foreign manufacturer (via KLH) files notification through MFDS electronic portal.

Required documents:

Device classification declaration
Device description and intended use (Korean)
Manufacturing site information
KLH information and agreement
Korean labeling and IFU (mockup acceptable)
Reference standards (Korean Medical Device Standard codes)

Not required for Class I:

KGMP certificate
Clinical evaluation report
Risk management file (summary acceptable)
Performance testing reports (basic declaration acceptable)

Days 1–7: Administrative Review

MFDS reviews for completeness. Common reasons for rejection at this stage:

Korean labeling missing MFDS-mandated elements
Classification declaration ambiguous
KLH agreement incomplete

Days 7–30: Substantive Review

MFDS evaluates classification correctness and basic conformity. For straightforward Class I:

~70% complete review within 30 days
~25% extend to 45–60 days (additional clarification)
~5% reclassified to Class II (requires withdrawal and refiling)

Day 30–60: KMD Number Issuance

Once cleared, KLH receives Korean Medical Device (KMD) number. Product can be legally imported and sold.

The 5 Mistakes That Slow Class I

Mistake 1: Over-Documenting

Foreign manufacturers accustomed to FDA 510(k) or EU MDR submit 200+ page dossiers for Class I notification. MFDS reviewers flag this as "documentation incommensurate with risk class" and may reclassify.

Fix: Submit 30–60 page notification. Reference KGMP / ISO 13485 conformity by certificate number rather than full documentation.

Mistake 2: Ambiguous Classification

Class I devices that have "monitoring" or "diagnostic" claims edge into Class II. MFDS reviewers err toward higher classification when intended use is unclear.

Fix: Use unambiguous Class I intended-use language. Avoid "monitoring," "diagnostic," "therapeutic decision-support" phrasings for Class I devices.

Mistake 3: Distributor as KLH (Default Choice)

Many manufacturers default to their Korean distributor as KLH. This creates commercial leverage issues post-approval.

Fix: Consider independent KLH service even for Class I to preserve future flexibility.

Mistake 4: Korean Labeling as Afterthought

Korean labels missing MFDS-mandated warnings cause notification holds.

Fix: Build Korean labels from MFDS Notice 2022-110 requirements during preparation, not after.

Mistake 5: Skipping Korean Medical Device Standard Mapping

Class I notifications still require referencing applicable Korean Medical Device Standards (식약처 고시) for materials, performance, and safety.

Fix: Identify relevant Korean Medical Device Standard codes during preparation. Reference them in notification.

Cost Comparison

Item	Class I Notification	Class II Registration
MFDS official fees	~₩300K ($220)	₩4M–₩8M ($3K–$6K)
Documentation preparation	$3K–$8K	$15K–$40K
KGMP (if required)	N/A	$15K–$45K
KLH setup	$2K–$5K	$2K–$5K
Translation	$2K–$5K	$5K–$15K
Total	$7K–$18K	$40K–$110K
Timeline	30–60 days	4–9 months

Foreign manufacturers entering Korea with Class I products often achieve revenue 6+ months earlier than Class II competitors at 10–20% the regulatory cost.

Frequently Asked Questions

Q: Can we self-classify our device as Class I?

A: Yes, but MFDS reserves the right to reclassify during review. For borderline devices, pre-submission classification consultation with MFDS is recommended. Misclassification adds 60–90 days to clearance.

Q: Do we still need a Korea License Holder for Class I?

A: Yes. All foreign manufacturers — regardless of device class — require a KLH (Korea License Holder) to file notifications and hold the resulting KMD number.

Q: Does Class I exempt us from post-market obligations?

A: No. Class I devices still require adverse event reporting, change notifications, and KLH-maintained vigilance. Obligations are lighter than Class II–IV but not absent.

Q: Can we upgrade from Class I to higher class later?

A: Yes, but requires new registration (not modification of existing notification). If you plan to add higher-risk variants, consider Class II registration from the start.

Q: How long does Leanabl typically take to clear a Class I notification?

A: 30–45 days for clean cases with prepared documentation. Total project (preparation + clearance) typically 6–10 weeks.

How Leanabl Helps

Korea Class I Express Registration — accelerated Class I pathway
KLH Service — independent Korea License Holder
Regulatory Pathway Strategy — Class I vs Class II decision support

Contact Leanabl for Class I scoping.

Last updated: 2026-05-15.