2027 ICD-10-CM Diagnosis Code D75.822Immune-mediated heparin-induced thrombocytopenia
ICD-10-CM Codes›D50–D89›D70-D77›D75
- Billable — Valid for Submission
- Not Chronic
D75.822 is a billable ICD-10-CM diagnosis code for immune-mediated heparin-induced thrombocytopenia. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 791, 793, 813. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Coagulation and hemorrhagic disorders.
D75.822 no longer risk-adjusts for Medicare Advantage: it mapped to HCC 48 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 48, ESRD (V21) category 48, and ESRD (V24) category 48 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
D75.822 no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to D75.822: its own notes plus those printed at D75.82, D75, and Chapter 3. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Immune-mediated HIT
- Type 2 heparin-induced thrombocytopenia
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- autoimmune disease (systemic) NOS (M35.9)
- certain conditions originating in the perinatal period (P00-P96)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- human immunodeficiency virus [HIV] disease (B20)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name D75.822, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming D75.822: they are not reported together with it, unless the two conditions are unrelated.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Heparin Induced Thrombocytopenia
a life-threatening complication of heparin therapy. it results in immune-mediated thrombocytopenia and, in 25-50 percent of the patients, thrombotic complications.
Patient EducationClinical
Drug Reactions
Most of the time, medicines make our lives better. They reduce aches and pains, fight infections, and control problems such as high blood pressure or diabetes. But medicines can also cause unwanted reactions, such as drug interactions, side effects, and allergies.
The full article covers:
- What is a drug interaction?
- What are side effects?
- What are drug allergies?
- How can I stay safe when taking medicines?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code History & ChangesHistory
Replacement D75.822 replaces the following previously assigned code(s):
- D75.82 - Heparin induced thrombocytopenia (HIT)
Questions About D75.822Overview
What is the ICD-10 code for immune-mediated heparin-induced thrombocytopenia?
The ICD-10-CM code for immune-mediated heparin-induced thrombocytopenia is D75.822 (sometimes written as D75822). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is D75.822 (Heparin induced thrombocytopenia (HIT)) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report immune-mediated heparin-induced thrombocytopenia on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does D75.822 group to?
When immune-mediated heparin-induced thrombocytopenia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 813, with relative weights from 1.5279 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Does D75.822 need an additional code?
When the condition applies, yes. The Use Additional Code note at D75.82, which applies to D75.822, reads: code, if applicable, for adverse effect of heparin (T45.515-). The additional code is reported after D75.822.
Does D75.822 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage. D75.822 mapped to HCC 48 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 48 (Coagulation Defects and Other Specified Hematological Disorders), ESRD (V21) category 48 (Coagulation Defects and Other Specified Hematological Disorders), and ESRD (V24) category 48 (Coagulation Defects and Other Specified Hematological Disorders).
