ICD-10 Code D81.9
Combined immunodeficiency, unspecified
Valid for Submission
D81.9 is a billable code used to specify a medical diagnosis of combined immunodeficiency, unspecified. The code is valid for the year 2020 for the submission of HIPAA-covered transactions.
| ICD-10: | D81.9 |
| Short Description: | Combined immunodeficiency, unspecified |
| Long Description: | Combined immunodeficiency, unspecified |
Code Classification
- Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50–D89)
Code History
- FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
(first year ICD-10-CM implemented into the HIPAA mandated code set) - FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
- FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
- FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
- FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
Information for Medical Professionals
Diagnostic Related Groups
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). The diagnosis code D81.9 is grouped in the following groups for version MS-DRG V37.0 applicable from 10/01/2020 through 09/30/2020.
- 808 - MAJOR HEMATOLOGICAL AND IMMUNOLOGICAL DIAGNOSES EXCEPT SICKLE CELL CRISIS AND COAGULATION DISORDERS WITH MCC
- 809 - MAJOR HEMATOLOGICAL AND IMMUNOLOGICAL DIAGNOSES EXCEPT SICKLE CELL CRISIS AND COAGULATION DISORDERS WITH CC
- 810 - MAJOR HEMATOLOGICAL AND IMMUNOLOGICAL DIAGNOSES EXCEPT SICKLE CELL CRISIS AND COAGULATION DISORDERS WITHOUT CC/MCC
Convert D81.9 to ICD-9
The following crosswalk between ICD-10 to ICD-9 is based based on the General Equivalence Mappings (GEMS) information:
- 279.2 - Combined immunity defic (Approximate Flag)
Synonyms
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Autosomal recessive SCID
- Autosomal recessive severe combined immunodeficiency
- Benign combined immunodeficiency
- Combined immunodeficiency disease
- Combined immunodeficiency with faciooculoskeletal anomalies syndrome
- Congenital atrophy of optic nerve
- Hepatic veno-occlusive disease with immunodeficiency syndrome
- Obstruction of visceral vein
- Severe combined immunodeficiency disease
- Severe combined immunodeficiency with low T- and B-cell numbers
- Severe combined immunodeficiency with maternofetal engraftment
- Severe combined immunodeficiency, microcephaly, growth retardation, sensitivity to ionizing radiation syndrome
- Veno-occlusive disease of the liver
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code D81.9 are found in the index:
- - Agammaglobulinemia (acquired (secondary)) (nonfamilial) - D80.1
- - with
- - lymphopenia - D81.9
- - lymphopenic - D81.9
- - with
- - Immunodeficiency - D84.9
- - combined - D81.9
- - severe (SCID) - D81.9
- - severe combined (SCID) - D81.9
- - combined - D81.9
- - Syndrome - See Also: Disease;
- - combined immunity deficiency - D81.9
- - immunity deficiency, combined - D81.9
- - immunodeficiency
- - combined - D81.9
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references for the code D81.9 are found in the tabular index:
- Inclusion Terms:
- Severe combined immunodeficiency disorder [SCID] NOS
Information for Patients
Immune System and Disorders
Your immune system is a complex network of cells, tissues, and organs that work together to defend against germs. It helps your body to recognize these "foreign" invaders. Then its job is to keep them out, or if it can't, to find and destroy them.
If your immune system cannot do its job, the results can be serious. Disorders of the immune system include
- Allergy and asthma - immune responses to substances that are usually not harmful
- Immune deficiency diseases - disorders in which the immune system is missing one or more of its parts
- Autoimmune diseases - diseases causing your immune system to attack your own body's cells and tissues by mistake
[Learn More]
ICD-10 Footnotes
General Equivalence Map Definitions
The ICD-10 and ICD-9 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.