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LOINC Code 75515-7: Lupus anticoagulant two screening tests W Reflex panel Coag (PPP)

75515-7 is a LOINC code used to identify Lupus anticoagulant two screening tests W Reflex panel Coag (PPP) in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Lupus anticoagulant two screening tests W Reflex panel. It is commonly used with the system or sample type PPP.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

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 Lupus anticoagulant two screening tests W Reflex panel. It is commonly used with the system or sample type PPP.

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: Order
  • Panel type: Panel
  • Method: Coag

What it does not mean

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

Key facts

Lupus anticoagulant aPTT and dRVVT screening panel W Reflex
Lupus anticoagulant two screening tests W Reflex panel
The development of this panel for detecting Lupus Anticoagulant (LA) was shaped by the 2009 International Society of Thrombosis and Haemostasis (ISTH) and 2014 Clinical and Laboratory Standards Institute (CLSI) guidelines for lupus anticoagulant testing. They both recommend using two separate coagulation tests and identify dRVVT and aPPT as the two best choices. This aPPT & dRVVT panel is most closely aligned with the ISTH guidelines. The testing cascade starts with the use of the two above-named tests to screen for or verify a clotting abnormality, and if either is abnormal, reflexing to the same test with 11 pooled plasma (to exclude clotting factor deficiencies) and again with excess phospholipid (PL). Correction of the coagulopathy with excess phospholipid confirms the likelihood of LA. Neither published guidance nor laboratories agree on the order in which the two kinds of reflex tests should be done, and this panel does not take a position on that subject. Some laboratories report the absolute values of the test and some the normalized ratios. So LOINC includes both as alternatives. Only one or the other of the alternatives must be included in the panel report. A summary interpretation is required by both guidelines.
2; Anticoag; Anti-phospholipid antibody; aPTT-LA; Asympt; Asymptomatic; Clot; Clottable; COAGULATION; Coagulation assay; Coagulation inhibiting antibody; Dil Russell Vip Ven; dRVVT; LA; LA 2 screen W Reflex; LA 2 screen W Reflex pnl; LAC; Lupus inhibitor; Pan; PANEL.COAGULATION; Panl; Plas; Platelet poor plasma; Pnl; Point in time; Random; Scn; Tilt tube

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

Lupus anticoagulant two screening tests W Reflex panel Coag (PPP)Lupus anticoagulant aPTT and dRVVT screening panel W ReflexLA aPTT+dRVVT screen W reflex panelLupus anticoagulant two screening tests W Reflex panelPANEL.COAGLupus Anticoagulant Two Screening Tests W Reflex Panel, Blood-

Frequently asked questions

Code details

Code75515-7
SystemLOINC
Display nameLupus anticoagulant two screening tests W Reflex panel Coag (PPP)
DescriptionLupus anticoagulant two screening tests W Reflex panel
Short nameLA aPTT+dRVVT screen W reflex panel
ComponentLupus anticoagulant two screening tests W Reflex panel
Property-
TimingPt
System (specimen)PPP
Scale-
MethodCoag
ClassPANEL.COAG
StatusACTIVE
Order/ObservationOrder

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.50
Last changed2.67

Consumer names

Lupus Anticoagulant Two Screening Tests W Reflex Panel, Blood

Part names

Lupus anticoagulant two screening tests W Reflex panel-PtPPPCoagPoint in time (spot)Platelet poor plasmaCoagulation assay

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 75515-7 | HealthAssure