Changing anything on an existing medical device sanitary registration in Mexico, such as a distributor, manufacturing site, label or sterilization method, requires filing a COFEPRIS Medical Device Registration Modification (MCRS), not a new registration. Getting this distinction right the first time is what separates a quicker approval from months-long back-and-forth.
A modification changes something within an existing registration, a new registration is required when the change goes beyond the authorized scope and a renewal (prórroga) only extends validity without altering the registration’s authorized conditions.
This article covers what counts as a modification, how the rules evolved from 2022 to 2026, the required documentation and applicable timelines and fees.
Why COFEPRIS Modifications Matter for Market Continuity in Mexico
A sanitary registration is only accurate for as long as it reflects reality. If your distributor changes, your manufacturing site moves, your sterilization method is updated, or your product labeling changes without notifying COFEPRIS, the registration on file no longer matches what’s actually being sold in Mexico. That gap is what a COFEPRIS Medical Device Change Application is meant to close.
Several categories of information typically drift over time and require an MCRS to stay current:
- Registered product information (denomination, catalog numbers, presentations)
- Manufacturer and legal manufacturer (fabricante legal) details
- Registration holder (titular) information
- Importer and distributor information, domestic and foreign
- Labeling content
- Technical information tied to safety and performance
- Manufacturing site and process information
Keeping these fields aligned with the authorized registration avoids discrepancies COFEPRIS may flag during later renewals or inspections.
What “Modification” Means in COFEPRIS Terms
In COFEPRIS terms, a modification is any authorized change made to a medical device’s sanitary registration after the original registration or its prórroga was granted. It covers:
- Administrative changes: who holds the registration, who distributes it, how it’s labeled.
- Technical changes: how it’s made, where it’s made, how it’s sterilized, how long it lasts on the shelf
A COFEPRIS Sanitary Registration Modification is not the same thing as:
A new sanitary registration: required when a change affects the device’s intended use, involves substituting an active ingredient or material, alters components in ways that affect functionality or introduces a technological advance that changes the authorized purpose.
A renewal (prórroga): extends the registration’s period of validity. It does not, by itself, change the registration’s authorized conditions.
A rights transfer (Cesión de Derechos): technically filed as a type of modification under the same homoclave, but it transfers the ownership of the registration from one registration holder to another rather than altering a technical or administrative condition.
Regulatory Basis for Modifications
COFEPRIS modifications falls within a defined legal structure. The current framework rests on:
- Ley General de Salud, particularly Article 376, which sets the registration and renewal terms for medical devices
- Reglamento de Insumos para la Salud, which governs documentation and procedural requirements
- Suplemento para Dispositivos Médicos 5.0 of the Farmacopea de los Estados Unidos Mexicanos, which sets classification criteria
- COFEPRIS own guidance, most recently the Guía de modificaciones a las condiciones de registro sanitario de dispositivos médicos (December 2025)
That guide sets out two active homoclaves for this process:
| Homoclave | Type of modification | Current Status & Pathways | Document issued |
| COFEPRIS-2022-022-003 | Administrative modification | While the 2025 guide formally lists three modalities:
Currently, every COFEPRIS‑2022‑022‑003 filing now follows Modality B, regardless of initial paperwork. |
|
| COFEPRIS-2022-022-004-A | Technical Modification (always dictaminación) | This homoclave covers changes that require a technical‑scientific assessment from the outset. |
Oficio de Resolución (after technical‑scientific review).
|
Before filing, applicants should also confirm which administrative pathway the original registration was granted under. This may be Vía Ordinaria, the low-risk device listing agreement, or one of the equivalence agreements with the FDA, Health Canada, or Japan’s Ministry of Health, Labour and Welfare. The applicable pathway determines which supporting documents are required.
Simplification Agreements
Two DOF agreements reshaped how COFEPRIS processes modifications.
The July 2025 agreement merged duplicate homoclaves, removed several physical-document requirements, and set a 10 business day interim window for Homoclave COFEPRIS-2022-022-003.
The April 2026 agreement went further for this same homoclave. It cut the administrative dictaminación resolution time from 22 to 15 business days, and it groups Cesión de Derechos under modality B rather than treating it as a separate modality C.
Both agreements were designed to apply gradually, with entry into force ranging from 20 to 180 business days depending on the procedure. And as of today, they are already fully in force.
Timeline of How the COFEPRIS Modification Process Evolved: 2022-2026
The COFEPRIS Medical Device Registration Modification process has undergone several important changes since 2022.
- February 2022: COFEPRIS issued Oficio COFEPRIS-CFS-DEFS-02-2022, establishing the initial criteria for determining which medical device changes could be handled as modifications.
- August 2023: Oficio COFEPRIS-CFS-325-2023 replaced the 2022 criteria with updated criteria and introduced electronic file submission at the Centro Integral de Servicios (CIS).
- 2023 to 2025: The administrative modification process evolved from a single process into separate pathways. While the earlier 2023 guide described administrative modifications as a single process, the December 2025 guide formally identifies A. De resolución inmediata (Constancia), B. De dictaminación (Oficio de Resolución) and C. Cesión de Derechos.
- July 2025: Regulatory changes affecting COFEPRIS procedures simplified certain filing requirements and modified applicable procedures and homoclaves.
- December 2025: COFEPRIS published its updated modification guide. Although it continues to list all three modalities, current practice appears to differ from the formal framework. In practice, Modality A is no longer functioning as a practical route for most filings, while Modality B is the predominant pathway for substantive administrative modifications. Cesión de Derechos is generally handled through the dictaminación pathway when ownership of a registration is transferred.
Because this history involves multiple supersessions, applicants should always confirm they’re working from the current guide rather than an archived version.
Categories of COFEPRIS Medical Device Registration Changes
COFEPRIS separates modifications into three broad tracks, each with a different resolution product.
Administrative modifications (Homoclave COFEPRIS-2022-022-003)
These cover changes that don’t affect the device’s safety or performance. As per the current guide, this includes:
- Domestic address changes for the titular, importer, or distributor
- Adding or replacing a domestic distributor/importer
- Secondary packaging material changes (when not essential to stability)
- Foreign distributor name, address, or new-distributor changes
- Removing manufacturers (as long as at least one remains) or presentations
- Spelling corrections and denomination or catalog number changes
- Rights transfers (Cesión de Derechos)
Some of these, such as a domestic address change or adding a domestic distributor are resolved immediately with a Constancia. Others, like a registration holder’s name change or adding a new fabricante legal, require dictaminación and are resolved with an Oficio de Resolución.
Technical modifications (Homoclave COFEPRIS-2022-022-004-A)
These cover changes that can affect safety, performance or manufacturing, including:
- Changing the maquilador or manufacturing site (domestic or foreign)
- Adding new manufacturing sites limited to filiales or subsidiaries
- Changing both primary and secondary packaging materials together
- Reclassifying the device based on risk level, including software reclassification
- Confirming or modifying the shelf-life/expiration period
- New presentations that don’t involve a technological advance
- Formula changes that don’t substitute the active ingredient
- Sterilization method changes
- Software or app updates that add functions without changing the authorized indication for use
As per our practical experience, all technical changes are submitted for dictaminación and reviewed on a case-by-case basis. The specific modality applied depends on the extent of the variation. Because COFEPRIS’s own criteria for classifying variations can change over time, the applicable modality is often only confirmed once the review is underway rather than being fully predictable at the time of filing.
Changes requiring a new registration
These are changes the guide treats as exceeding the scope of a modification:
- A change in dosage form
- Substitution of the active ingredient or its material
- A technological advance that changes the device’s principal purpose
- A change made by a distributor without the titular’s authorization
COFEPRIS’s own guide is explicit that these fall outside the modification process entirely.
Step-by-Step COFEPRIS Medical Device Change Application Process
A typical COFEPRIS Medical Device Change Application moves through these stages:
Step 1: Review the current sanitary registration against what’s actually happening with the product, manufacturer, labeling or distribution chain.
Step 2: Identify precisely what changed and match it against the categories above.
Step 3: Determine whether it’s an administrative modification, a technical modification with dictaminación or something that actually needs a new registration.
Step 4: Confirm the correct homoclave and, where applicable, whether the change qualifies for the Ventanilla de Resolución Inmediata.
Step 5: Complete the current official form, FF-COFEPRIS-15, available through COFEPRIS’s Formatos Vigentes page at the Centro Integral de Servicios (CIS).
Step 6: Assemble supporting documentation specific to the change.
Step 7: Confirm the role of the titular’s legal representative in Mexico. All modification requests must be filed by the titular through this representative.
Step 8: Book a CIS appointment where one is currently required for submission.
Step 9: Prepare files for electronic submission where the current process calls for it. Note that even electronic submissions have, at times, still required in-person delivery of removable media at the CIS, so this should be confirmed before filing rather than assumed.
Step 10: Submit the request and pay the applicable government fee.
Step 11: Respond promptly to any COFEPRIS request for clarification (prevención).
Step 12: Receive the Constancia or Oficio de Resolución.
Not every modification can be completed fully online today. The extent of electronic processing depends on the specific homoclave and the stage of the ongoing digitalization agreements described in the timeline above.
COFEPRIS Modification Requirements and Documentation
Documentation requirements vary by the specific change, but the guide identifies a consistent core set of documents that recur across most modification types:
- FF-COFEPRIS-15, properly completed
- Proof of government fee payment
- A proposed label or counter-label (marbete) reflecting the requested change, where labeling is affected
- A Carta de Representación from the legal manufacturer, required only when the product isn’t made by the applicant’s own parent company or affiliate
- A Certificado de Buenas Prácticas de Fabricación (CBPF) or equivalent (such as an MDSAP audit certificate or ISO 13485:2016 certification) for manufacturing-site or maquilador changes
- A Certificado de Libre Venta (CLV) or equivalent for foreign-manufactured devices, for changes like new presentations or reclassification
- Certificates of analysis or finished-product testing declarations, for technical changes affecting materials or formulation
- Stability or aging study reports, where a shelf-life or packaging change is involved
- Sterilization validation summaries, for method or packaging changes affecting sterility
- Notarized or apostilled legal documents, for name changes, ownership changes or Cesión de Derechos
COFEPRIS Modification Timeline and Fees
Timeline
COFEPRIS’s modification process runs on two tracks:
Resolución inmediata: same-day processing for defined administrative changes, producing a Constancia, available through the CIS with a prior appointment.
- The July 2025 DOF simplification agreement set a 10-business-day interim window for Homoclave COFEPRIS-2022-022-003.
- As per our experience, administrative modifications commonly take 1 to 3 months in practice.
Dictaminación: technical review that produces an Oficio de Resolución.
- For administrative modifications under Homoclave COFEPRIS-2022-022-003, a DOF decree dated April 30, 2026 sets the resolution time at 15 business days, reduced from 22.
- Technical modifications under Homoclave COFEPRIS-2022-022-004-A remain governed by the general RIS figure of 45 business days.
- As per our practical experience technical modifications commonly take 8 to 18 months or longer in practice.
Fees
Modification fees are set under Article 195-A of the Ley Federal de Derechos, calculated as 50% or 75% of the base registration fee, depending on the modification and the device’s risk class (Class I, II, or III).
As per our practical experience nearly all variations and renewals end up billed at the 75% rate. A pure rights transfer nominally qualifies for 50%, but it’s usually filed together with a distributor change, which pushes it to 75%.
A few things are worth knowing before budgeting for a modification. Although the guide states the applicable fee percentages for each causal, the corresponding peso amounts change annually. Always confirm the current fee amount against that year’s official COFEPRIS tariff schedule or the Ley Federal de Derechos rather than relying on a figure from a previous year.
Common Pitfalls and Compliance Considerations
Some recurring issues affect how smoothly an MCRS moves through COFEPRIS:
- Misclassifying the change. Treating a technical change as administrative (or vice versa) sends the filing down the wrong homoclave and typically triggers a prevención.
- Confusing fabricante real and fabricante legal. The guide treats these as distinct roles with different documentation consequences. Eliminating a fabricante legal, for example, is not processed the same way as eliminating a fabricante real.
- Inconsistent information across the file. A denomination that doesn’t match the label, or a distributor address that doesn’t match the aviso de funcionamiento, creates discrepancies COFEPRIS may flag.
- Assuming an administrative change needs no regulatory filing. Even a spelling correction outside the internal correction window requires a formal modification request.
- Assuming every change routes through the same procedure. A domestic distributor change and a manufacturing-site change follow different homoclaves, different documentation sets and different resolution products.
- Missing the Cesión de Derechos notification window. The guide requires notification within 30 business days of the transfer under Article 190 of the Reglamento de Insumos para la Salud.
- Assuming a longer prórroga reduces filing obligations. The January 2026 reform extended prórroga periods from 5 to 10 years, but this only changes renewal frequency. A device on a 10-year prórroga with an outdated distributor address still needs an MCRS, and the same reform formalized tecnovigilancia obligations that reinforce rather than replace this duty.
Electronic Notifications and Ongoing COFEPRIS Compliance
COFEPRIS has moved parts of the modification process toward electronic submission since 2023, but not all at once.
- The August 2023 criteria required electronic files, though early filings still often meant delivering them in person on removable media at a CIS appointment.
- The July 2025 simplification agreements went further, cutting physical-format requirements and merging duplicate homoclaves, but rolled out gradually, with entry-into-force periods ranging from 20 to 180 business days depending on the procedure.
Our experts confirm the July 2025 measures are now fully in force across COFEPRIS’s systems.
Conclusion
Getting a COFEPRIS modification right means reviewing what’s currently authorized, identifying exactly what’s changing, determining the applicable pathway, and matching it to the correct homoclave and documentation before filing. The process keeps evolving, from the 2023 classification overhaul through the 2025 and 2026 simplification agreements, but the underlying obligation stays the same. Registration information has to match reality.
Need help with a COFEPRIS modification, technical documentation, or regulatory strategy in Mexico? Reach out to info@artixio.com for guidance tailored to your product.
FAQ
Q1. How long does a COFEPRIS modification take to approve?
Officially, resolución inmediata can be same-day, and administrative dictaminación under Homoclave COFEPRIS-2022-022-003 was cut to 15 business days (from 22) by an April 2026 decree; technical modifications fall under the general 45-business-day RIS window. In practice, the timeline ranges from 1 to 3 months for administrative changes and 8 to 18 months or longer for technical ones.
Q2. What’s the difference between an administrative and a technical modification?
Administrative (Homoclave COFEPRIS-2022-022-003) covers addresses, distributors and denominations that don’t affect safety or performance. Technical (Homoclave COFEPRIS-2022-022-004-A) covers manufacturing sites, sterilization and risk reclassification that can.
Q3. Is there a fee for filing a modification?
Yes, 50% or 75% of the base registration fee under Article 195-A LFD, depending on modification type and risk class. In practice, nearly all filings, including rights transfers, end up billed at 75%.
Q4. Does a distributor change require a new registration?
No, it’s an administrative modification under Homoclave COFEPRIS-2022-022-003, as long as the titular authorizes it. Without that authorization, it’s treated differently and can require a new registration.
Q5. What happens if a modification isn’t reported to COFEPRIS?
It risks cancellation or revocation of the registration. There’s no single uniform penalty for every unreported change, so treat any material change as reportable.
