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Code: R79.1
Abnormal coagulation profile
Excludes 1: coagulation defects (D68.-)
Excludes 2: abnormality of fluid, electrolyte or acid-base balance (E86-E87)
Abnormal or prolonged bleeding time
Abnormal or prolonged coagulation time
Abnormal or prolonged partial thromboplastin time [PTT]
Abnormal or prolonged prothrombin time [PT]
Parent Code Notes: R79
Excludes1: asymptomatic hyperuricemia (E79.0)
hyperglycemia NOS (R73.9)
hypoglycemia NOS (E16.2)
neonatal hypoglycemia (P70.3-P70.4)
specific findings indicating disorder of amino-acid metabolism (E70-E72)
specific findings indicating disorder of carbohydrate metabolism (E73-E74)
specific findings indicating disorder of lipid metabolism (E75.-)
Use additional code to identify any retained foreign body, if applicable (Z18.-)

Category Notes
Abnormal findings on examination of blood, without diagnosis (R70-R79)
Excludes 2: abnormal findings on antenatal screening of mother (O28.-)
abnormalities of lipids (E78.-)
abnormalities of platelets and thrombocytes (D69.-)
abnormalities of white blood cells classified elsewhere (D70-D72)
coagulation hemorrhagic disorders (D65-D68)
diagnostic abnormal findings classified elsewhere - see Alphabetical Index
hemorrhagic and hematological disorders of newborn (P50-P61)

Coding Guidelines
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Note: This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
The conditions and signs or symptoms included in categories R00-R94 consist of:
(a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
(b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
(c) provisional diagnosis in a patient who failed to return for further investigation or care;
(d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
(e) cases in which a more precise diagnosis was not available for any other reason;
(f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.
Excludes 2: abnormal findings on antenatal screening of mother (O28.-)
certain conditions originating in the perinatal period (P04-P96)
signs and symptoms classified in the body system chapters
signs and symptoms of breast (N63, N64.5)
Raleigh, NC
Best answers

If anyone know about the rules or guideline for ICD-9 code 790.92 Versus v58.61 in ICD-10 R79.1 versus Z86.718 codes, Please share it. When I can code the 790.92/R79.1 VERSUS V58.61/Z86.718?


True Blue
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790.92/R79.1 are for abnormal coagulation lab results without a diagnostic history of a coagulation disorder

V58.61 (ICD-9) is Long-term (current) use of anticoagulants. If you only had an abnormal result on a coagulation test, you wouldn't already be on anticoagulants, let alone on a long term basis.

Z86.718 (ICD-10) is Personal history of other venous thrombosis and embolism. You have to have been diagnosed with the condition n the past to have a history of it. So abnormal test result without a DX would not indicate a personal history of a disorder.
Last edited:
Raleigh, NC
Best answers
Thank you!!!


Thank you so much. You always reply to my post. You explain it very well. You are a true coding king. I always read your post from the time you join AAPC and passed your exam. Thanks once again.