D89.40
BillableMast cell activation, unspecified
Mast cell activation, unspecified
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Mast cell activation disorder, unspecified
- Mast cell activation syndrome, NOS
Includes
Conditions included under this code
- defects in the complement system
- immunodeficiency disorders, except human immunodeficiency virus [HIV] disease
- sarcoidosis
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- •autoimmune disease (systemic) NOSM35.9
- •functional disorders of polymorphonuclear neutrophilsD71
- •human immunodeficiency virus [HIV] diseaseB20
- •hyperglobulinemia NOSR77.1
- •monoclonal gammopathy (of undetermined significance)D47.2
- •aggressive systemic mastocytosisC96.21
- •congenital cutaneous mastocytosisQ82.2
- •(non-congenital) cutaneous mastocytosisD47.01
- •(indolent) systemic mastocytosisD47.02
- •malignant mast cell neoplasmC96.2
- •malignant mastocytomaC96.29
- •mast cell leukemiaC94.3
- •mast cell sarcomaC96.22
- •mastocytoma NOSD47.09
- •other mast cell neoplasms of uncertain behaviorD47.09
- •systemic mastocytosis associated with a clonal hematologic non-mast cell lineage disease (SM-AHNMD)D47.02
Excludes 2
Conditions not included here, but the patient may have both
- •autoimmune disease (systemic) NOSM35.9
- •certain conditions originating in the perinatal periodP00-P96
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •human immunodeficiency virus [HIV] diseaseB20
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •transplant failure and rejectionT86
Related Codes(5)
Also Known As / Clinical Terms(34)
SNOMED CT
UMLS
- Idiopathic Mast Cell Activation DisorderC5200989
- MCAD - mast cell activation disorderC5200989
- Mast Cell Activation SyndromeC5200989
- Mast Cell Activation SyndromesC5200989
- Mast cell activation syndromeC5200989
- Mast cell activation syndrome (disorder)C5200989
- Mast cell activation syndrome, NOSC5200989
- Non Clonal Mast Cell Activation DisorderC5200989
- Non Clonal Mast Cell Activation SyndromeC5200989
- Non-Clonal Mast Cell Activation DisorderC5200989
- Non-Clonal Mast Cell Activation SyndromeC5200989
- Nonclonal Mast Cell Activation SyndromeC5200989
- nc MCASC5200989
- nc-MCASC5200989
- Mast cell activation disorder, unspecifiedC4267892
- Mast cell activation, unspecifiedC4267892
Clinical Terms
- Mast cell activation syndrome (disorder)
- Idiopathic Mast Cell Activation Disorder
- nc-MCAS
- Non-Clonal Mast Cell Activation Disorder
- Mast cell activation syndrome, NOS
- MCAD - mast cell activation disorder
- Non-Clonal Mast Cell Activation Syndrome
- nc MCAS
- Nonclonal Mast Cell Activation Syndrome
- Non Clonal Mast Cell Activation Syndrome
- Mast cell activation syndrome
- Mast cell activation disorder, unspecified
- Mast Cell Activation Syndromes
- Non Clonal Mast Cell Activation Disorder
- Anaphylaxis due to mast cell disorder
Frequently Asked Questions
What is the ICD-10 code for mast cell activation, unspecified?
The ICD-10-CM code for mast cell activation, unspecified is D89.40. The full clinical description is "Mast cell activation, unspecified". D89.40 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code D89.40 mean?
ICD-10-CM code D89.40 represents “Mast cell activation, unspecified”. It is classified under Chapter 3: Diseases of the Blood and Blood-Forming Organs and is a billable/specific code that can be used on a claim.
Is D89.40 a billable code?
Yes, D89.40 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is D89.40 in?
D89.40 is in Chapter 3: Diseases of the Blood and Blood-Forming Organs (codes D50-D89).
What codes cannot be used with D89.40?
D89.40 has Excludes1 notes indicating codes that cannot be used together with it, including: autoimmune disease (systemic) NOS (M35.9); functional disorders of polymorphonuclear neutrophils (D71); human immunodeficiency virus [HIV] disease (B20); and 13 more.
What SNOMED CT codes does D89.40 map to?
D89.40 maps to 2 SNOMED CT concepts: 735448003, 16697871000119100. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for D89.40?
D89.40 is linked to 2 UMLS Concept Unique Identifiers: C5200989, C4267892. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does D89.40 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like mast cell activation, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of D89.40?
There is no direct ICD-11 mapping available for D89.40 in the WHO crosswalk tables. This may mean the concept is classified differently in ICD-11. Use the ICD-10 to ICD-11 converter to search for related codes.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.