Filing a Class I medical device with China’s NMPA (National Medical Products Administration) is generally considered the simplest approval pathway. Yet, according to provincial NMPA data, a surprisingly high percentage of first‑time submissions are rejected or returned for corrections – causing unnecessary delays of 2‑4 months. Most Class I filing rejections stem from a handful of predictable, preventable errors. Understanding these pitfalls and knowing how to fix them can save you time, money, and frustration. This guide covers the top rejection reasons and provides actionable solutions.
1. Incorrect Product Classification – The Most Common Mistake
Class I is reserved for low‑risk devices. However, many applicants mistakenly file products that should be Class II or even Class III. The NMPA‘s Medical Device Classification Catalog (2026 updated edition) defines the boundaries. Common classification errors include:
- Filing a device that contains pharmacological or immunological ingredients – For example, a wound dressing with silver ions or antimicrobial agents often falls into Class II or III.
- Claiming a therapeutic function beyond the catalog’s description – A physical cooling device must not claim to reduce fever systemically; if it does, it is no longer Class I.
- Misinterpreting “sterile” devices – While some sterile devices remain Class I (e.g., sterile examination gloves), many sterile products (e.g., sterile ultrasound gel) have been up‑classified to Class II in recent catalog adjustments.
- Assuming a device is Class I because it is simple – For example, non‑powered manual wheelchairs were down‑classified to Class I in 2026, but powered wheelchairs remain Class II.
How to fix: Before filing, carefully review the latest Medical Device Classification Catalog (2026 version) and any classification adjustment announcements. If there is any ambiguity, apply for a formal classification determination (分类界定) from the NMPA. Submitting a classification request is free and takes about 2‑3 months. It is far better to get a binding ruling than to file under the wrong class and be rejected.
2. Incomplete or Inconsistent Filing Dossier
The NMPA requires a specific set of documents for Class I filing (备案). Missing or inconsistent documents are a leading cause of return. Common issues include:
- Missing product technical requirements (产品技术要求) – This document must include performance indicators, test methods, and acceptance criteria. Many applicants submit only a brief specification sheet.
- No safety risk management report – A basic risk analysis (e.g., per ISO 14971, simplified) is required. Some applicants omit it entirely.
- Inconsistent product name – The name on the filing application, the label, the technical requirements, and the instruction manual must be identical. Even a missing space or punctuation triggers a return.
- Missing or invalid China agent power of attorney – The agent’s authorization letter must be notarized and include a certified Chinese translation.
- Foreign documents not translated – Any document in a foreign language must be accompanied by a certified Chinese translation.
How to fix: Use the NMPA‘s official filing application form (available on the provincial NMPA website) and follow the “dossier checklist” provided by your local filing authority. Have a second person (or a regulatory consultant) cross‑check all documents for consistency. For translations, hire a certified translator with medical device experience – machine translations are not accepted.
3. Labeling and Instruction Manual Non‑Compliance
The submitted label artwork and instruction manual are scrutinized against NMPA Order No. 6 (Measures for the Administration of Medical Device Instruction Manuals and Labels). Common rejections include:
- Missing mandatory elements on the label – Product name, model, manufacturer, China agent, production date, shelf life/expiry, storage conditions, and filing certificate number must all appear. Even one missing item causes rejection.
- No UDI barcode – For Class I devices, UDI became mandatory on June 1, 2024. As of 2026, any Class I device without a UDI barcode on the label will be rejected.
- Incorrect date format – Production date and expiry date must be in “YYYY‑MM‑DD” or “YYYY年MM月DD日”.
- Instruction manual in English only – The manual must be in simplified Chinese. English may appear in addition but not as a substitute.
- Claims beyond intended use – For example, stating “anti‑inflammatory” for a simple cold compress – such claims are not allowed for Class I devices.
How to fix: Create a label template that includes all mandatory fields. Have a regulatory specialist review the artwork and instruction manual before submission. Use the correct date format and include the UDI barcode (following GS1 or MA standards). Ensure the instruction manual contains clear warnings, storage instructions, and a “Date of issue” or “Revision date”.
4. Inadequate or Missing Test Reports
Even for Class I, certain tests are mandatory. Missing or invalid test reports cause immediate rejection. Required tests depend on the product type, but common ones include:
- Biocompatibility – For devices that contact skin or mucous membranes (e.g., surgical drapes, examination gloves), a biocompatibility test per GB/T 16886 series is required.
- Sterility validation – For sterile devices, you must provide sterilization validation reports (EO, gamma, or radiation) and sterility testing.
- Electrical safety – For simple electrical Class I devices (e.g., non‑invasive LED therapy devices), GB 9706 series may apply. Many applicants mistakenly assume that because the device is Class I, no electrical safety tests are needed – this is false.
- Performance tests – The product technical requirements must be verified by a CNAS‑accredited lab. Some applicants submit in‑house test reports without third‑party accreditation – those are not accepted.
How to fix: Review the specific product technical requirements for your device category. Engage a CNAS‑accredited test lab that is familiar with NMPA filing requirements. Obtain complete test reports (including raw data, test setup photos, and equipment calibration certificates). Ensure that the test report’s date is within 3 years of the filing submission.
5. China Agent Related Errors
Foreign manufacturers cannot file a Class I device directly; they must appoint a China agent (also called the “filing holder” or “responsible party”). Agent‑related rejections include:
- Agent not registered with the local NMPA authority – The agent must have a valid business license and be able to accept legal responsibility. Some agents claim to offer filing services but are not officially registered.
- Power of attorney (POA) expired or not notarized – The POA must be notarized in the country of origin and legalized (or apostilled) and then translated into Chinese. An expired or improperly executed POA is a common rejection.
- Agent‘s name/address mismatch with the label – The label must show the agent’s name and address exactly as on the filing certificate. Any variation (e.g., “Ltd.” vs “Limited”) causes rejection.
- No agent appointed at all – Some foreign manufacturers attempt to file directly – this is not permitted.
How to fix: Choose an agent with a proven track record in medical device filing. Request their business license and verify that their scope includes “medical device consulting” or similar. Execute a POA using a template approved by the local NMPA office, have it notarized and legalized, and provide a certified Chinese translation. Double‑check that the agent’s details on the label match the official registration.
6. Missing or Incorrect UDI Information
Since June 1, 2024, Class I devices must bear a UDI (Unique Device Identification) barcode on the label. Rejections occur when:
- No UDI barcode on the label – The product may be returned at customs.
- UDI format does not comply with Chinese standards – China accepts GS1, MA, or AHM standards; the barcode must be scannable and contain both the device identifier (DI) and production identifier (PI).
- UDI information not uploaded to the NMPA UDI database – Filing requires that the UDI‑DI be registered in the NMPA‘s UDI platform before submission. Some applicants skip this step.
- UDI does not match the filing product information – The DI must correspond exactly to the product name, model, and manufacturer.
How to fix: Obtain a GS1 Company Prefix (or other approved standard) and assign a DI to each device model. Generate a scannable barcode (1D GS1-128 or 2D Data Matrix). Upload the DI information to the China NMPA UDI database (http://udi.nmpa.gov.cn). Print the barcode on the label and test readability with standard scanners.
7. Failure to Update Filing After Product Changes
Class I filings are subject to change notification. If you modify the product name, model, intended use, materials, or packaging, you must file a change notification (变更备案) with the NMPA. Common mistakes:
- Shipping a product with an updated label or component without updating the filing – customs may compare the product against the original filing and flag discrepancies.
- Adding a new color, size, or packaging variant without updating the filing – each variant must be covered by the filing.
- Changing the China agent without filing a change – this invalidates the original filing.
How to fix: Establish a change control procedure. Any change that affects the product identity, safety, or labeling must be filed with the NMPA before the changed product is imported. For minor changes (e.g., agent address change), a simple notification may suffice; for significant changes, a new filing may be required.
8. Pre‑Submission Checklist for Class I Filing Success
To avoid the rejection reasons above, use this checklist before submitting your filing:
- [ ] Classification confirmed using the latest Medical Device Classification Catalog (2026).
- [ ] All required documents compiled: product technical requirements, risk management report, test reports (biocompatibility, sterility, electrical safety if applicable).
- [ ] Label artwork includes all mandatory elements (product name, model, manufacturer, agent, production date, expiry, storage, filing number, UDI barcode).
- [ ] Instruction manual in simplified Chinese, with warnings and intended use consistent with the catalog.
- [ ] China agent‘s POA notarized, legalized, translated, and current.
- [ ] UDI barcode generated and uploaded to NMPA UDI database.
- [ ] All foreign documents accompanied by certified Chinese translations.
- [ ] Product name and model consistent across all documents.
Summary: Top Class I filing rejection reasons – classification errors, incomplete documentation, labeling non‑compliance, missing test reports, agent mistakes, UDI omissions, and unapproved changes – are all preventable. By following the pre‑submission checklist, working with a qualified China agent, and engaging accredited test labs, you can achieve first‑time approval. Each error avoided saves months of delays and thousands in resubmission costs. Start your filing preparation early – success is in the details.