Specific code 2014 ICD-9-CM Diagnosis Code 451.9
Phlebitis and thrombophlebitis of unspecified site
  • Billable Code
  • Short description: Thrombophlebitis NOS.
  • ICD-9-CM 451.9 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 451.9 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Thrombophlebitis
Convert to ICD-10-CM: 451.9 converts directly to:
  • 2014 ICD-10-CM I80.9 Phlebitis and thrombophlebitis of unspecified site
ICD-9-CM Volume 2 Index entries containing back-references to 451.9:
  • Endophlebitis (see also Phlebitis) 451.9
  • Gout, gouty 274.9
  • Inflammation, inflamed, inflammatory (with exudation)
    • vein (see also Phlebitis) 451.9
      • thrombotic 451.9
  • Periphlebitis (see also Phlebitis) 451.9
    • superficial (vessels) 451.0
  • Phlebitis (infective) (pyemic) (septic) (suppurative) 451.9
    • blue 451.9
    • cavernous (venous) sinus - see Phlebitis, intracranial sinus
    • cerebral (venous) sinus - see Phlebitis, intracranial sinus
    • chest wall, superficial 451.89
    • complicating pregnancy or puerperium 671.2
      • affecting fetus or newborn 760.3
    • cranial (venous) sinus - see Phlebitis, intracranial sinus
    • due to implanted device - see Complications, due to (presence of) any device, implant, or graft classified to 996.0-996.5 NEC
    • during or resulting from a procedure 997.2
    • femoral vein (deep) (superficial) 451.11
    • following infusion, perfusion, or transfusion 999.2
    • intracranial sinus (any) (venous) 325
      • late effect - see category 326
      • nonpyogenic 437.6
        • in pregnancy or puerperium 671.5
    • lateral (venous) sinus - see Phlebitis, intracranial sinus
    • longitudinal sinus - see Phlebitis, intracranial sinus
    • migrans, migrating (superficial) 453.1
    • pelvic
      • with
        • abortion - see Abortion, by type, with sepsis
        • ectopic pregnancy (see also categories 633.0-633.9) 639.0
        • molar pregnancy (see also categories 630-632) 639.0
      • following
      • puerperal, postpartum 671.4
    • saphenous (great) (long) 451.0
    • sinus (meninges) - see Phlebitis, intracranial sinus
    • uterus (septic) (see also Endometritis) 615.9
    • varicose (leg) (lower extremity) (see also Varicose, vein) 454.1
  • Thrombophlebitis 451.9
    • cavernous (venous) sinus - see Thrombophlebitis, intracranial venous sinus
    • cerebral (sinus) (vein) 325
      • late effect - see category 326
      • nonpyogenic 437.6
        • in pregnancy or puerperium 671.5
        • late effect - see Late effect(s) (of) cerebrovascular disease
    • due to implanted device - see Complications, due to (presence of) any device, implant, or graft classified to 996.0-996.5 NEC
    • during or resulting from a procedure NEC 997.2
    • following infusion, perfusion, or transfusion 999.2
    • idiopathic, recurrent 453.1
    • intracranial venous sinus (any) 325
      • late effect - see category 326
      • nonpyogenic 437.6
        • in pregnancy or puerperium 671.5
        • late effect - see Late effect(s) (of) cerebrovascular disease
    • lateral (venous) sinus - see Thrombophlebitis, intracranial venous sinus
    • longitudinal (venous) sinus - see Thrombophlebitis, intracranial venous sinus
    • pelvic
      • with
        • abortion - see Abortion, by type, with sepsis
        • ectopic pregnancy (see also categories 633.0-633.9) 639.0
        • molar pregnancy (see also categories 630-632) 639.0
      • following
      • puerperal 671.4
    • puerperal, postpartum, childbirth (extremities) (superficial) 671.2
    • saphenous (greater) (lesser) 451.0
    • sinus (intracranial) - see Thrombophlebitis, intracranial venous sinus
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 451.9 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.