LOINC Code 99444-2: Sweet vernal grass+Perennial rye grass+Timothy+Rye+Velvet grass IgG4 (S) [Mass/Vol]

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component (Anthoxanthum odoratum+Lolium perenne+Phleum pratense+Secale cereale+Holcus lanatus) Ab.IgG4. It is commonly used with the system or sample type Ser.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Both

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• Grass Allergen Mix 3 (Sweet vernal grass+Perennial rye grass+Timothy+Rye+Velvet grass) IgG4 Ab [Mass/volume] in Serum
• (Anthoxanthum odoratum+Lolium perenne+Phleum pratense+Secale cereale+Holcus lanatus) Ab.IgG4
• ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; f005; f5; g001; g005; g006; g013; g1; g13; g5; g6; Grass Allerg Mix3; Grass mix (late flowering); gx3; Italian Ryegrass; Level; Mass concentration; Per rye grass; Perennial ryegrass; Phleum pretense; Point in time; QNT; Quan; Quant; Quantitative; Random; Rye; Rye grass; Ryegrass; Serum; SR; Sw Vernal grass; Sweet vernal grass; Timothy; Timothy grass; Velvet grass; Yorkshire fog

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions