Anticoagulants and antiplatelets are used for the prevention and treatment of blood clots that occur in blood vessels. Oftentimes, anticoagulants and antiplatelets are referred to as “blood thinners,” but they don’t actually thin the blood at all. These drugs slow down the body’s process of making clots. Their main function is to keep the patient’s blood from clotting or turning into solid clumps of cells. These drugs do this by interfering with either fibrin or platelets in the blood.
Clots that are formed in the vein are mostly made of fibrin. This includes the diagnoses that we see of deep-vein-thrombosis (DVT). However, clots in the arteries typically are formed with mostly platelets. This includes the arterial diagnoses we see such as arterial thrombus, brain thrombus and heart thrombus, to name a few.
For coding professionals, it is important to pick up the long-term current use of both anticoagulants and antiplatelets, and report with the appropriate ICD-10-CM diagnosis code. Taking these medications can require further labs, monitoring or testing.
—Long-term Current use of anticoagulant (see above for most common)
—Long-term Current use of antiplatelet (see above for most common)
—Long-term Current use of aspirin (aspirin has its’ own code)
This is a trick question! Anticoagulants do NOT dissolve blood clots. They only help prevent new clots from occurring, or existing clots from enlarging, but they do not aid in dissolving the old clot. The body will dissolve the clot naturally if it can be dissolved.
The length for taking these medications depends on the reason for needing to start them in the first place. They can prescribed for a few weeks or for the rest of your life. The site of the blood clot (if that is why they are prescribed) also helps to determine the length the medication will be needed.
There are always risk to any medication and treatment, but the physician will weigh out the risk vs. benefit before starting the patient on either of these medications. The risk vs. benefit of prescribing an anticoagulant/antiplatelet is a very serious thought process. If the patient has a risk of falls or frequent falls, the decision may be to NOT begin the patient on an anticoagulant or antiplatelet. The chance of increased bleeding is very high in a patient on anticoagulants. Hemorrhage is the most concerning adverse effect of the medication in a patient on anticoagulants.
Remember for coding, if the patient is taking their medication as prescribed and develops an adverse reaction, such as bleeding, this is coded as an adverse reaction to the prescribed medication and not a poisoning. If the patient is NOT taking the medication as prescribed and hemorrhage or other issue occurs, this is coded as a poisoning.
The latest edition of AHA, Coding Clinic for ICD-10-CM/ICD-10-PCS has given direction to coders on reporting the diagnosis of traumatic head injury associated with enhanced bleeding due to patient’s Coumadin use.
Per the recent AHA Coding Clinic this is reported with the trauma code followed by the codes for hemorrhagic disorder due to extrinsic circulating anticoagulants along with the adverse effect of medication, and long term (current) use of anticoagulants. The example that is given is a patient with a subdural hemorrhage that is enhanced due to the patient’s use of Coumadin therapy. A Question that comes to mind for coders in cases like this is “is the bleeding due to the fall or the medications?” If it is not clear, a query will be needed for the physician to determine if this was due to trauma…like a cause and effect. Only the physician can make these decisions. It could be that the injury is not severe enough to have caused the subdural hemorrhage with only minor external injury and the subdural hemorrhage caused the fall. Since we can’t make assumptions, the physician will need to clarify if it is not clearly stated in the record.
Authored by Kim Boy, RHIT, CDIP, CCS, CCS-P
References
ICD-10-CM/PCS Coding Clinic, First Quarter ICD-10 2021 Page: 4
health.harvard.edu/heart-health/understanding-blood-thinners
haematologica.org/article/view/9514
hopkinsmedicine.org/health/conditions-and-diseases/what-are-platelets-and-why-are-they-important
ncbi.nlm.nih.gov/pmc/articles/PMC3654192/
ahajournals.org/doi/10.1161/CIRCULATIONAHA.113.006285#:~:text=These%20medications%20increase%20the%20time,sometimes%20completely%2C%20sometimes%20only%20partially.
journal.ahima.org/knowing-the-difference-between-anticoagulants-and-antiplatelets/
heartandstroke.ca/heart-disease/treatments/medications/anticoagulants
heartfoundation.org.nz/your-heart/heart-treatments/medications/antiplatelet-agents#:~:text=Antiplatelets%20are%20medicines%20that%20stop,reduces%20inflammation%20in%20the%20arteries.
haematologica.org/article/view/9514
hopkinsmedicine.org/health/conditions-and-diseases/what-are-platelets-and-why-are-they-important
ncbi.nlm.nih.gov/books/NBK279433/
ncbi.nlm.nih.gov/books/NBK519025/
ICD-10-CM Official Guidelines for Coding and Reporting FY 2021
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