FDA PRODUCT CODE · CLASS II
GKZ — Counter, Differential Cell
What these counts are not
Clearance and recall counts are SPEQ’s aggregation of FDA’s own published records for the code. A recall count is a measure of history, not of a device’s safety, neither number is an FDA rating, and SPEQ is not affiliated with the FDA.
What this classification requires
Every statement below is FDA’s own classification record for this product code, quoted from the device classification field reference. The SPEQ reading beneath each one is SPEQ’s interpretation of what it means for the work, and is not FDA text.
510(K)
SPEQ READINGA premarket notification under 21 CFR Part 807 Subpart E is the route for this code. The submission argues substantial equivalence to a legally marketed predicate, so the engineering question is which predicate the design can actually be compared against, and the evidence question is what testing supports that comparison.
Class II (moderate to high risk): general controls and special controls
SPEQ READINGSpecial controls are the distinguishing feature: performance standards, guidance documents, patient registries or postmarket surveillance named for the device type. Find the special controls before designing the test plan — they usually name the tests.
Device is not eligible for The Voluntary Malfunction Summary Reporting Program
SPEQ READINGIndividual malfunction reporting under 21 CFR Part 803 applies. The complaint-handling system has to produce a decision per event, not per period.
Not exempt due to Good Manufacturing Practice (GMP)/Quality System
SPEQ READINGThe full Quality Management System Regulation (21 CFR 820, incorporating ISO 13485:2016) applies, and is what an FDA inspection of this device will be conducted against.
Device is not implantable
SPEQ READINGNo implant-specific expectations attach from the classification itself.
Device is not used for life sustaining purposes
SPEQ READINGNo life-sustaining designation attaches to this code.
Device is not a candidate for a third party review program
SPEQ READINGFDA reviews any premarket notification for this code directly.
Other product codes under 21 CFR 864.5220
One regulation usually governs several product codes. These share this code’s regulation, and therefore its classification basis.
21 CFR 864.5220 — Automated differential cell counter
The classification regulation for this product code, as published by the Office of the Federal Register. This is the regulation text itself — no SPEQ interpretation appears in it.
(a) Identification. An automated differential cell counter is a device used to identify one or more of the formed elements of the blood. The device may also have the capability to flag, count, or classify immature or abnormal hematopoietic cells of the blood, bone marrow, or other body fluids. These devices may combine an electronic particle counting method, optical method, or a flow cytometric method utilizing monoclonal CD (cluster designation) markers. The device includes accessory CD markers.
(b) Classification. Class II (special controls). The special control for this device is the FDA document entitled “Class II Special Controls Guidance Document: Premarket Notifications for Automated Differential Cell Counters for Immature or Abnormal Blood Cells; Final Guidance for Industry and FDA.” [67 FR 1607, Jan. 14, 2002]
Source: Electronic Code of Federal Regulations, Title 21. 21 CFR is a work of the United States Government and is in the public domain. SPEQ read this section on October 21, 2026. CFR is amended continuously, so verify against the source before acting on it: read 21 CFR 864.5220 on eCFR →
Recent clearances
Recent recalls
Software issue for hq analyzer results in system not visibly applying appropriate flagging to results when saturation is present which may result in incorrect results.
The devices contain a dry natural rubber (latex) subcomponent, which are not labeled as containing dry natural rubber(latex).
Due to partial label detachment on tubes. This can cause tubes to become stuck together in the pouch or cause automation errors when used with the automated loader for the wash assistant.
Due to partial label detachment on tubes. This can cause tubes to become stuck together in the pouch or cause automation errors when used with the automated loader for the wash assistant. Firm root cause investigation confirmed that label detachment is due to an adhesive change by a tier 2 supplier
Due to partial label detachment on tubes. This can cause tubes to become stuck together in the pouch or cause automation errors when used with the automated loader for the wash assistant. Firm root cause investigation confirmed that label detachment is due to an adhesive change by a tier 2 supplier.
A manufacturing defect on the amplifier board of the Flow Cytometers my cause signal loss and/or signal drifting resulting in absence of data or a population shift in the data plots. This can impact patient results for any application.
A manufacturing defect on the amplifier board of the Flow Cytometers my cause signal loss and/or signal drifting resulting in absence of data or a population shift in the data plots. This can impact patient results for any application.
Beckman Coulter has determined that additional clarification for the Blast Suspect messages is necessary. In rare situations, the UniCel DxH 800 and DxH 600 Coulter Cellular Analysis System may not flag or detect blasts in some blood samples. This is due to limitations in the available technology as
Source: FDA device classification, 510(k)/PMA, and recall datasets. Recall entries count distinct FDA recall numbers, so one recall event affecting several products appears as several entries. Browse every product code SPEQ tracks →