510(k) · Cleared
ClearedLZI Fentanyl II Enzyme Immunoassay
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Lin-Zhi International, Inc. · DJG Enzyme Immunoassay, Opiates
Cleared on Aug 7, 2020 as substantially equivalent to K181159 (Lin-Zhi International, Inc., 2018) after a 25-day review. Its family tree reaches back 5 generations to 2000. 1 later device descends from it.
- Decided
- Aug 7, 2020
- Review
- 25 days
- Class
- Class II
- Product code
- DJG
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 5 generations to K001178 (2000). 1 later device descends from it, 1 citing it directly.
- Root · 5 generations backK001178 Cedia Dau 6-Acetylmorphine AssayMicrogenics Corp. · 2000
- 4 generations backK040316 Cedia Buprenorphine AssayMicrogenics Corp. · 2004
- 3 generations backK150606 Emit II Plus Buprenorphine Assay, Emit II Plus Specialty Drug…Siemens Healthcare Diagnostics, Inc. · 2015
- 2 generations backK161216 Immunalysis SEFRIA Fentanyl Urine Enzyme Immunoassay, Immunalysis…Immunalysis Corporation · 2017
- 1 generation backK181159 LZI Fentanyl Enzyme ImmunoassayLin-Zhi International, Inc. · 2018
- This deviceK201938 LZI Fentanyl II Enzyme ImmunoassayLin-Zhi International, Inc. · 2020
- Descendant · cites it directly · 0 of its ownK251634 LZI Fentanyl III Enzyme ImmunoassayLin-Zhi International, Inc. · 2025
Most influential descendants
Showing 1 of 1 · See all- K251634LZI Fentanyl III Enzyme ImmunoassayLin-Zhi International, Inc. · 2025 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −5 | K001178 | Cedia Dau 6-Acetylmorphine Assay | Microgenics Corp. | 2000 | — |
| −4 | K040316 | Cedia Buprenorphine Assay | Microgenics Corp. | 2004 | — |
| −3 | K150606 | Emit II Plus Buprenorphine Assay, Emit II Plus Specialty Drug… | Siemens Healthcare Diagnostics, Inc. | 2015 | — |
| −2 | K161216 | Immunalysis SEFRIA Fentanyl Urine Enzyme Immunoassay, Immunalysis Fentanyl… | Immunalysis Corporation | 2017 | — |
| −1 | K181159 | LZI Fentanyl Enzyme Immunoassay | Lin-Zhi International, Inc. | 2018 | — |
| 0 (this device) | K201938 | LZI Fentanyl II Enzyme Immunoassay | Lin-Zhi International, Inc. | 2020 | — |
| +1 | K251634 | LZI Fentanyl III Enzyme Immunoassay | Lin-Zhi International, Inc. | 2025 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2025 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA summary (predicates and indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in DJG? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new DJG device
- #1 K232659 Dochek® Multi-Drug Urine Test Cup Rx, Dochek®…score 17.6 · 8 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (1)
Devices the submitter claimed this one is substantially equivalent to (*), and reference devices cited for a specific test or feature (†), as written in the FDA summary.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | K181159 | LZI Fentanyl Enzyme ImmunoassaySummary page 5…munoassay Legally Marketed Predicate Device(s) The LZI Fentanyl II Enzyme Immunoassay is substantially equivalent to the LZI Fentanyl Enzyme Immunoassay (k181159) manufactured by Lin-Zhi International, Inc. The LZI Fentanyl II Enzyme Immunoassay is identical or similar to its predicate in t… | 2018 |
What descends from it? (1)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K251634 | LZI Fentanyl III Enzyme Immunoassay | 2025 | 0 |
Has anything in its family been recalled? (0 Class I)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
What does this lineage say?
- The line of descent spans 20 years and passes through 4 companies; a new generation was cleared every 1.7 years on median.
- None of the 5 ancestors has a recall.
- Of its descendants, K251634 (Lin-Zhi International, Inc., 2025) has gone furthest, with 0 descendants of its own.
How does its category compare?
All DJG devicesDJG Enzyme Immunoassay, Opiates: FDA decisions, review times, recalls and adverse event reports over 20 years. 2020, this device’s year, is highlighted.
FDA decisions per year · DJG
3in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · DJG
31in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · DJG
2in 2025
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · DJG
1in 2025
MAUDE reports naming product code DJG, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 2 | — | 0 | 0 |
| 2008 | 2 | — | 0 | 0 |
| 2009 | 2 | — | 0 | 0 |
| 2010 | 6 | 187 | 0 | 0 |
| 2011 | 6 | 233 | 1 | 4 |
| 2012 | 5 | 95 | 0 | 1 |
| 2013 | 5 | 60 | 0 | 4 |
| 2014 | 9 | 62 | 0 | 0 |
| 2015 | 12 | 141 | 0 | 3 |
| 2016 | 2 | — | 0 | 2 |
| 2017 | 4 | 101 | 0 | 1 |
| 2018 | 5 | 134 | 0 | 1 |
| 2019 | 3 | 235 | 1 | 0 |
| 2020 | 5 | 30 | 0 | 0 |
| 2021 | 3 | 422 | 0 | 2 |
| 2022 | 2 | — | 0 | 1 |
| 2023 | 10 | 140 | 0 | 0 |
| 2024 | 5 | 150 | 0 | 3 |
| 2025 | 3 | 31 | 2 | 1 |
| 2026 | 3 | 157 | 0 | — |
What is it indicated for?
The LZI Fentanyl II Enzyme Immunoassay is intended for the qualitative determination of norfentanyl in human urine at the cutoff value of 5 ng/mL. The assay is designed for prescription use with a number of automated clinical chemistry analyzers.
The assay provides only a preliminary analytical result. A more specific alternative chemical method (e.g., gas or liquid chromatography and mass spectrometry) must be used in order to obtain a confirmed analytical result. Clinical consideration and professional judgment should be exercised with any drug of abuse test result, particularly when the preliminary test result is positive.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K201938 · printed Nov 6, 2026
Cite this page
510(k) Report. “K201938: LZI Fentanyl II Enzyme Immunoassay.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K201938
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Record history
- FDA decision record loaded May 2, 2026
- Summary read Oct 13, 2026 (extraction version 9eaa42aa01ed)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026