NST: Autoantibodies, Acetylcholine Receptor, Acetylcholine Blocking And Non-Blocking
FDA product code NST. Class II, classified under 21 CFR 866.5660. What the classification flags say about Part 820 under the QMSR.
As of Oct 26, 2026, FDA product code NST (Autoantibodies, Acetylcholine Receptor, Acetylcholine Blocking And Non-Blocking) is Class II under 21 CFR 866.5660, reviewed through 510(k), with 4 linked 510(k), De Novo or BK numbers, 0 PMAs and 0 recall product records.
Classification
- Product code
- NST
- Device name
- Autoantibodies, Acetylcholine Receptor, Acetylcholine Blocking And Non-Blocking
- Device class
- Class II
- Regulation
- 21 CFR 866.5660
- Review panel
- Immunology
- Premarket route
- 510(k)
- CGMP-exempt flag
- No
- Life-sustaining flag
- No
- Implant flag
- No
- Third-party review
- Candidate for third-party review
- Summary malfunction reporting
- Eligible
FDA definition. THE DEVICE IS AN IMMUNOASSAY INDICATED AS AN AID IN THE DIAGNOSIS OF MYASTHENIA GRAVIS, AN AUTOIMMUNE DISEASE CHARACTERIZED BY EXERCISE-INDUCED MUSCLE WEAKNESS TEMPORARILY RELIEVED BY CESSATION OF EXERCISE. AUTOANTIBODY, WHEN PRESENT IN SERUM, INTERFERES WITH THE BINDING OF ACETYLCHOLINE, A NEURAL TRANSMITTER AT THE JUNCTION OF NERVES WITH MUSCLES. AUTOANTIBODY CAN ALSO BIND TO OTHER PORTIONS OF THE ACETYLCHOLINE RECEPTOR WITHOUT INTERFERING WITH ACETYLCHOLINE BINDING. PRESENCE OF AUTOANTIBODY ALONG WITH CLINICAL SIGNS AND SYMPTOMS ARE USUALLY HIGHLY SUGGESTIVE OF MYASTHENIA GRAVIS. ACETYLCHOLINE RECEPTOR AUTOANTIBODY CAN ALSO OCCUR IN THE PRESENCE OF AUTOANTIBODIES TO OTHER BODY SUBSTANCES.
Data from openFDA as of 26 October 2026. Read the record on openFDA · FDA product code classification database
Part 820 requirements the flags point to
Part 820 rules for NST
- CGMP exemptionClassification regulation, 21 CFR parts 862 to 892
- Not flaggedFDA does not flag this product code as exempt.A manufacturer of a finished device of this type falls under part 820 (21 CFR 820.1(a)). Some classification regulations exempt only part of a generic device type, so read the regulation for your device.FDA: QMSR, CGMP exemptions · 21 CFR 820.35
- Design and development, ISO 13485 clause 7.321 CFR 820.10(c)
- Rule names this classRule names Class II.21 CFR 820.10(c) requires manufacturers of class II and class III devices to comply with clause 7.3 and its subclauses.21 CFR 820.10
- Traceability, ISO 13485 clause 7.5.9.221 CFR 820.10(d)
- Not flaggedFDA does not flag this code as life-supporting or life-sustaining.820.10(d) is not indicated by this flag.21 CFR 820.10 · 21 CFR 860.3 · QMSR final rule, comment 49
- Complaint and record content21 CFR 820.35
- Rule names this classApplies to every finished-device manufacturer, exempt or not.820.35 adds content to complaint records, servicing records and UDI recording on top of ISO 13485 clause 4.2.5. FDA says CGMP exemption does not lift these records.21 CFR 820.35 · FDA: QMSR, CGMP exemptions
These flags describe the classification of a product code. They are not a determination for a specific device or manufacturer. How a manufacturer meets 21 CFR 820.10 depends on its own device, its intended use and the full text of the rule.
Clearances and recalls on record
- 510(k), De Novo and BK numbers linked
- 4 · Search these clearances
- PMA numbers linked
- 0
- Recall product records
- 0
- Adverse event reports
- Search MAUDE for NST
Recall records count products, and one recall event can add many. Counts show activity in a category. They do not measure its safety.
Search all 7,097 product codes, or read the guide to the Part 820 rules behind these flags.
Check your quality documents against Part 820
Arca puts your SOPs and design files in a library and compares them against the Part 820 requirements for your device in a grid, one row per document and one column per requirement, with each cell cited to its source.