FDA Additional Information & Deficiency Response

We deconstruct each FDA question to identify the underlying regulatory concern, trace it back through the submission and determine whether the real issue is evidence, study design, predicate logic, labeling, consistency or presentation.

Send Us Your FDA Deficiency Letter for Review

What This Service Is

An FDA deficiency should not be answered by simply adding more information. The first task is to determine why the reviewer raised the question and what must be resolved for the review to progress.

When It Is Needed

After receipt of an FDA Additional Information request

During Interactive Review when FDA requests clarification or additional evidence

When a predicate or substantial equivalence strategy has been challenged

When testing, biocompatibility, sterilization, software, cybersecurity or labeling deficiencies are raised

When the original submission was prepared internally or by another consultant and an independent technical review is needed

Our Response Method

Deconstruct the reviewer question

Identify the root regulatory or technical concern

Review the affected submission sections and source evidence

Determine whether clarification, re-analysis, revised documentation or new testing is required

Rebuild the affected regulatory argument where necessary

Prepare a clear consolidated response with supporting evidence and cross-references

What We Look For

We assess whether the deficiency reflects missing evidence, an unsupported claim, inadequate test design, an inappropriate predicate comparison, inconsistent labeling, contradictory documentation or simply poor presentation of existing data.

Our Difference

Root-Cause Resolution at the Source

We do not treat FDA comments as isolated checklist items. We trace each question to the weakness in the underlying regulatory argument and fix that weakness at source.

FDA 180-Day AI Clock

Upon receiving an AI hold letter, sponsors have up to 180 calendar days to submit a full response before the file is deemed withdrawn by CDRH.

Early deconstruction is critical to determine if new testing is required.

Received an FDA Hold?

Send your deficiency letter for an immediate confidential technical assessment.

Send Deficiency Letter

Need to Respond to an FDA Deficiency Letter?

Our experts will deconstruct the FDA review queries and prepare a definitive, airtight response package.

Book a Consultation