2026 ICD-10-CM Diagnosis Code Q87.87Hao-Fountain Syndrome
Q87.87 is a billable ICD-10-CM diagnosis code for Hao-Fountain Syndrome. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 564 through 566. The code is exempt from POA reporting.
Code Identity
Code Classification
Present on Admission (POA)Billing
Q87.87 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- HAFOUS
Use Additional Code
- code, if applicable, for associated conditions such as:
- autism spectrum disorder F84.0
- developmental speech disorder F80
- epilepsy, by specific type G40
- intellectual disabilities F70 F79
- pervasive developmental disorders F84
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.
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- HAFOUS (Hao-Fountain syndrome) - Q87.87
- Syndrome - See Also: Disease;
- Hao-Fountain (HAFOUS) - Q87.87
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- HAFOUS(Hao-Fountain syndrome)
- Syndrome
- Hao-Fountain (HAFOUS)
Code History & ChangesHistory
New Code Q87.87 was added to the ICD-10-CM code set for FY 2026, effective October 1, 2025.
Replacement Q87.87 replaces the following previously assigned code(s):
- Q87.89 - Oth congenital malformation syndromes, NEC
Questions About Q87.87Overview
Is Q87.87 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report Hao-Fountain Syndrome on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does Q87.87 group to?
When Hao-Fountain Syndrome is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 565, 566, with relative weights from 0.7493 to 1.5436 depending on complications. Higher weights mean higher Medicare reimbursement.
Is Q87.87 exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for Hao-Fountain Syndrome on inpatient claims.
