hemophilia

DEFINITION of hemophilia

Hemophilia is a rare, primarily inherited genetic disorder that impairs the body’s ability to initiate and complete coagulation, the process needed to form a stable blood clot. It distinguishes itself from thrombophilia, which is a tendency to clot excessively, and von Willebrand disease, a related bleeding disorder caused by a defect in platelet adhesion rather than a primary clotting factor deficiency. The underlying pathological mechanism is typically an X-linked recessive mutation leading to a severe deficiency in either Factor VIII (Hemophilia A) or Factor IX (Hemophilia B), which disrupts the intrinsic pathway of the coagulation cascade and results in prolonged or spontaneous bleeding into joints, muscles, and internal organs. While almost exclusively a pathological, inherited condition affecting males, it can rarely manifest as an acquired autoimmune disorder (coded as D68.311) where the body produces antibodies against its own clotting factors. The clinically relevant inherited subtypes most commonly encountered in coding are Hemophilia A (classic hemophilia, coded as D66) and Hemophilia B (Christmas disease, coded as D67). It is commonly confused with hemorrhage; however, hemorrhage is the event of active bleeding, whereas hemophilia is the underlying systemic disease that makes a hemorrhage difficult or impossible to stop normally.

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ETYMOLOGY of hemophilia

greek

Component	Origin	Meaning
hemo- / hem-	Greek haima (αἷμα)	“blood” — primary anatomical root referring to blood or the vascular system
-philia / phil-	Greek philia (φιλία), from philos (loving)	“love,” “affection,” or clinically “abnormal tendency toward”

The word entered English in the 1820s as hemophilia (noun), borrowed from the German Hämophilie (coined in 1828 by Friedrich Hopff and Johann Schönlein from an earlier term haemorrhaphilia), from Greek haima and philia — literally “a love of blood” or “a tendency to bleed.” The adjective form hemophilic followed shortly after. The root haima (“blood”) connects hemophilia to the entire -hemo family: hemorrhage (bursting forth of blood), hematoma (tumor or swelling of blood), and hemostasis (stopping of blood flow). The suffix -philia is highly productive in medical terminology to denote abnormal tendencies, affinities, or accumulations, appearing in terms like thrombophilia, eosinophilia, and neutrophilia.

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🔀 ALIASES / ALTERNATE TERMS

• Hemophilic (adjective form — e.g., “hemophilic arthropathy,” “hemophilic pseudotumor”)
• Haemophilia (British/Commonwealth English spelling)
• Bleeder’s disease (historical lay synonym — historically used before the specific factors were identified)
• Hemophilia A (etiologic subtype — classic hemophilia caused by a deficiency in coagulation Factor VIII; D66)
• Hemophilia B (etiologic subtype — also called Christmas disease, caused by a deficiency in Factor IX; D67)
• Hemophilia C (etiologic subtype — Rosenthal syndrome, caused by a deficiency in Factor XI, predominantly affecting Ashkenazi Jews; D68.1)
• Acquired hemophilia (etiologic subtype — rare autoimmune disorder where the immune system attacks Factor VIII; D68.311)

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🔗 RELATED TERMS

• Thrombophilia — the opposite of hemophilia; an abnormality of blood coagulation that increases the risk of thrombosis (blood clots).
• Eosinophilia — shares the -philia root; an increase in the number of eosinophils in the blood, demonstrating the suffix’s use for “accumulation or affinity.”
• Von Willebrand disease — closely related bleeding disorder caused by missing or defective von Willebrand factor (VWF), a clotting protein. It is the most common bleeding disorder, whereas hemophilia is rare.
• Coagulation — the physiological mechanism of forming a blood clot, which is broken or severely delayed in patients with hemophilia.
• Hemarthrosis — bleeding into joint spaces; the hallmark severe complication of hemophilia, leading to chronic joint destruction.
• Hemorrhage — the escape of blood from a ruptured blood vessel; the active clinical manifestation that hemophilia predisposes a patient to.

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CODING CORNER

🏥 ICD-10-CM CODES

Hereditary Hemophilia Forms

Code	Description
D66	Hereditary factor VIII deficiency (Hemophilia A)
D67	Hereditary factor IX deficiency (Hemophilia B)
D68.1	Hereditary factor XI deficiency (Hemophilia C)

Acquired and Other Coagulation Defects

Code	Description
D68.311	Acquired hemophilia
D68.312	Antiphospholipid antibody with hemorrhagic co-occurrence
D68.01	Von Willebrand disease, type 1
D68.9	Coagulation defect, unspecified

Manifestations / Complications

Code	Description
M36.2	Hemophilic arthropathy (Note: code underlying disease first, e.g., D66)
R58	Hemorrhage, not elsewhere classified

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🔧 COMMON CPT CODES (Hemophilia-Related Diagnosis & Treatment)

CPT Code	Description
85240	Blood coagulation factor VIII, VW factor, ristocetin cofactor
85250	Blood coagulation factor IX
85270	Blood coagulation factor XI
85730	Thromboplastin time, partial (PTT); plasma or whole blood
96365	Intravenous infusion, for therapy, prophylaxis, or diagnosis (specify substance or drug); initial, up to 1 hour (often used for factor replacement therapies)

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⚠️ Coding Note: Inpatient profee and outpatient coding for hemophilia demands high specificity regarding the exact deficient factor. Never default to an unspecified coagulation defect (D68.9) if the patient has a documented history of Hemophilia A, B, or C. A critical sequencing rule applies when a patient presents with hemophilic arthropathy (joint damage from repeated bleeds): ICD-10-CM guidelines mandate coding the underlying bleeding disorder first (e.g., D66 for Hemophilia A), followed by the manifestation code (M36.2). An undercoding alert: coders frequently miss acquired hemophilia (D68.311) when a patient with no family history suddenly presents with severe bleeding and Factor VIII inhibitors; ensure this is distinguished from the hereditary form (D66). When billing for prophylactic or acute factor replacement infusions (e.g., 96365), you must accurately report the corresponding HCPCS J-codes (e.g., J7190 for Factor VIII) and ensure prior authorization is tightly aligned with the specific diagnosis and severity documented.

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DERIVATIONS of hemophilia

TABLE definition AS Definition
FROM #medterm 
WHERE length(filter(roots, (word) => econtains([[hemophilia]].roots, word))) > 0 AND file.name != [[hemophilia]].file.name
SORT file.name ASC

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Query functionality

TABLE definition AS Definition
FROM #medterm 
WHERE length(filter(definition, (word) => econtains([[hemophilia]].definition, word))) > 0 AND file.name != [[hemophilia]].file.name

Med roots Appendix A Prefixes Appendix B Combining Forms Appendix C Suffixes Appendix D Suffix forms