Version 2024

2024 ICD-10-CM Diagnosis Code D89.44

Hereditary alpha tryptasemia

ICD-10-CM Code:: D89.44
ICD-10 Code for:: Hereditary alpha tryptasemia
Is Billable?: Yes - Valid for Submission
Chronic Condition Indicator: ^[1]: Chronic
Code Navigator:

Code Information
Clinical Classification
Tabular List of Diseases and Injuries
Index to Diseases and Injuries References
Diagnostic Related Groups Mapping
Replacement Code
Patient Education
Other Codes Used Similar Conditions
Code History

Code Classification

Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
(D50–D89)
- Certain disorders involving the immune mechanism
  (D80-D89)
  - Other disorders involving the immune mechanism, not elsewhere classified
    (D89)

D89.44 is a billable diagnosis code used to specify a medical diagnosis of hereditary alpha tryptasemia. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Clinical Classification

Clinical Category is Immunity disorders
CCSR Category Code: BLD008
Inpatient Default CCSR: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.
Outpatient Default CCSR: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.

Use Additional Code

code, if applicable, for:
allergy status, other than to drugs and biological substances Z91.0
personal history of anaphylaxis Z87.892

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

- Hereditary alpha tryptasemia (syndrome) - D89.44

- Syndrome - See Also: Disease;
- - hereditary alpha tryptasemia - D89.44

- Tryptasemia, hereditary alpha - D89.44

D89.44 is grouped with Diagnostic Related Groups - MS-DRG Mapping

Diagnostic Related Groups (DRGs) are a classification system used to group together diagnosis codes for the purpose of reimbursement and healthcare management. DRGs are used to standardize the way hospitals and other providers are paid for inpatient services. In this system patients are grouped together based on their principal diagnosis in areas referred to as Major Diagnostic Categories (MDC). Once a patient is assigned a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is often fixed and is meant to cover the cost of care for that patient. Reimbursement is also affected by the relative weight of a diagnostic related group based on the severity of a patient's illness and the associated cost of care during hospitalization.

Diagnostic related groups encourage healthcare providers to focus on quality and efficiency in patient care while managing costs effectively. The diagnosis code is present in the following groups for version MS-DRG V41.0 applicable from 10/01/2023 through 09/30/2024.

MS-DRG	MS-DRG Title	MCD	Relative Weight
814	RETICULOENDOTHELIAL AND IMMUNITY DISORDERS WITH MCC	16	2.1281
815	RETICULOENDOTHELIAL AND IMMUNITY DISORDERS WITH CC	16	0.9942
816	RETICULOENDOTHELIAL AND IMMUNITY DISORDERS WITHOUT CC/MCC	16	0.7102

The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Replacement Code

D8944 replaces the following previously assigned ICD-10-CM code(s):

D89.49 - Other mast cell activation disorder

Code History

FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
FY 2022 - Code Added, effective from 10/1/2021 through 9/30/2022

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
The condition places limitations on self-care, independent living, and social interactions.