ICD-9 Code 136.9

Unspecified infectious and parasitic diseases

Not Valid for Submission

136.9 is a legacy non-billable code used to specify a medical diagnosis of unspecified infectious and parasitic diseases. This code was replaced on September 30, 2015 by its ICD-10 equivalent.

ICD-9: 136.9
Short Description:Infect/parasite dis NOS
Long Description:Unspecified infectious and parasitic diseases

Convert 136.9 to ICD-10

The following crosswalk between ICD-9 to ICD-10 is based based on the General Equivalence Mappings (GEMS) information:

  • B89 - Unspecified parasitic disease
  • B99.9 - Unspecified infectious disease

Code Classification

  • Infectious and parasitic diseases (001–139)
    • Other infectious and parasitic diseases (130-136)
      • 136 Other and unspecified infectious and parasitic diseases

Information for Medical Professionals


  • Acute disseminated encephalomyelitis
  • Acute disseminated encephalomyelitis following infectious disease
  • Acute hemorrhagic leukoencephalitis
  • Acute infectious disease
  • Acute infective bronchitis
  • Acute infective cystitis
  • Acute infective exacerbation of chronic obstructive airways disease
  • Acute infective tracheobronchitis
  • Acute pancreatitis due to infection
  • Allergic dermatitis due to bite of Ctenocephalides felis
  • Anemia due to infection
  • Aplastic anemia due to infection
  • Arteriovenous fistula infection
  • Arthritis due to parasitic infection
  • Arthropathy associated with infection
  • Bacterial endophthalmitis
  • Blastomycosis-like pyoderma
  • Bone fixation device infection
  • Cerebral arteritis due to infectious disease
  • Chronic granulomatous infection due mostly to Staphylococcus aureus
  • Chronic infectious disease
  • Clinical infection
  • Congenital arteriovenous fistula infection
  • Cross infection
  • Dermatophilosis due to Dermatophilus congolensis
  • Dilated cardiomyopathy secondary to fungal myocarditis
  • Dilated cardiomyopathy secondary to infection
  • Disease caused by parasite
  • Dust-borne infectious disease
  • Enanthematous infectious disease
  • Epidemic disease
  • Fomite transmitted infectious disease
  • Fungal infection of cerebrum
  • Hakuri
  • Halzoun
  • Healthcare associated infectious disease
  • Herpetosoma
  • Human immunodeficiency virus disease resulting in multiple infections
  • Human immunodeficiency virus infection with secondary clinical infectious disease
  • Hydatidosis myositis
  • Ill-defined infectious disease
  • Immunosuppression-related infectious disease
  • Infected bunion
  • Infected olecranon bursa
  • Infection - non-suppurative
  • Infection - suppurative
  • Infection by Alaria
  • Infection by Amidostomum
  • Infection by Hexamita
  • Infection by Nosema apis
  • Infection by Raillietina
  • Infection by site
  • Infection due to antimicrobial resistant virus
  • Infection of bloodstream
  • Infection of foot associated with diabetes
  • Infection of obstetric surgical wound
  • Infection of preauricular sinus
  • Infection of prepatellar bursa
  • Infection of soft tissue of cervical spine
  • Infection of soft tissue of lumbar spine
  • Infection of soft tissue of thoracic spine
  • Infection of tick bite
  • Infection of uncertain etiology
  • Infection of wound hematoma
  • Infectious arthritis of temporomandibular joint
  • Infectious disease
  • Infectious disease associated with acquired immune deficiency syndrome
  • Infectious disease in mother complicating childbirth
  • Infectious disease of abdomen
  • Infectious disease of brain
  • Infectious disease of heart
  • Infectious granuloma
  • Infectious hemopoietic necrosis
  • Infectious peritonitis
  • Infective arthritis of joint of hand
  • Infective arthritis of shoulder region
  • Infective blepharitis
  • Infective corneal ulcer
  • Infective disorder of head
  • Infective endocarditis
  • Infective panniculitis
  • Infective proctitis
  • Infective urethritis
  • Inflammation of skin due to parasite
  • Liver disorder due to infection
  • Localized infection
  • Lymphedema due to infection
  • Masked infection
  • Miscarriage with pelvic peritonitis
  • Mixed infectious disease
  • Multi-organism infectious disease
  • Musculoskeletal infective disorder
  • Myocarditis due to infectious agent
  • Necrotizing soft tissue infection
  • Necrotizing vasculitis secondary to infection
  • Neuropathy due to infection
  • Neutropenia associated with infectious disease
  • Non-intestinal flagellate infection
  • Nosocomial infectious disease
  • Opportunistic infectious disease
  • Overwhelming infection in asplenic patient
  • Parasite isolated but not further identified
  • Parasitic chorioretinitis
  • Parasitic choroiditis
  • Parasitic encephalitis
  • Parasitic eye infection
  • Parasitic infection of lung
  • Parasitic infection of the central nervous system
  • Parasitic infestation of orbit
  • Parasitic myocarditis
  • Parasitic pericarditis
  • Parasitic peritonitis
  • Parvovirus infection of the central nervous system
  • Pelvic peritonitis following molar AND/OR ectopic pregnancy
  • Perinatal jaundice from infection
  • Persistent infection
  • Placenta infected
  • Pleural effusion associated with pulmonary infection
  • Pneumonia due to parasitic infestation
  • Post infectious osteoarthritis
  • Post-genitourinary infection reactive arthritis
  • Post-infective myelitis
  • Protothecosis
  • Recurrent lower respiratory tract infection
  • Secondary infection
  • Seizures complicating infection
  • Seizures complicating infection in the newborn
  • Sexually acquired reactive arthropathy of multiple sites
  • Sexually acquired reactive arthropathy of the ankle and/or foot
  • Sexually acquired reactive arthropathy of the hand
  • Sexually acquired reactive arthropathy of the pelvic region and thigh
  • Sexually acquired reactive arthropathy of the shoulder region
  • Site-specific pyogenic infection of skin and subcutis
  • Soft tissue infection
  • Subacute infectious disease
  • Subclinical infection
  • Superimposed infection
  • Therapy failure due to antibiotic resistance
  • Thyroid infection
  • Urethral stricture due to infection

Index to Diseases and Injuries

References found for the code 136.9 in the Index of Diseases and Injuries:

Information for Patients

Parasitic Diseases

Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not.

Parasites range in size from tiny, one-celled organisms called protozoa to worms that can be seen with the naked eye. Some parasitic diseases occur in the United States. Contaminated water supplies can lead to Giardia infections. Cats can transmit toxoplasmosis, which is dangerous for pregnant women. Others, like malaria, are common in other parts of the world.

If you are traveling, it's important to drink only water you know is safe. Prevention is especially important. There are no vaccines for parasitic diseases. Some medicines are available to treat parasitic infections.

[Read More]

ICD-9 Footnotes

General Equivalence Map Definitions
The ICD-9 and ICD-10 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.

Index of Diseases and Injuries Definitions

  • And - The word "and" should be interpreted to mean either "and" or "or" when it appears in a title.
  • Code also note - A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
  • Code first - Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
  • Type 1 Excludes Notes - A type 1 Excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • Type 2 Excludes Notes - A type 2 Excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • Includes Notes - This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
  • Inclusion terms - List of terms is included under some codes. These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • NEC "Not elsewhere classifiable" - This abbreviation in the Alphabetic Index represents "other specified". When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified” code in the Tabular List.
  • NOS "Not otherwise specified" - This abbreviation is the equivalent of unspecified.
  • See - The "see" instruction following a main term in the Alphabetic Index indicates that another term should be referenced. It is necessary to go to the main term referenced with the "see" note to locate the correct code.
  • See Also - A "see also" instruction following a main term in the Alphabetic Index instructs that there is another main term that may also be referenced that may provide additional Alphabetic Index entries that may be useful. It is not necessary to follow the "see also" note when the original main term provides the necessary code.
  • 7th Characters - Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
  • With - The word "with" should be interpreted to mean "associated with" or "due to" when it appears in a code title, the Alphabetic Index, or an instructional note in the Tabular List. The word "with" in the Alphabetic Index is sequenced immediately following the main term, not in alphabetical order.