2027 ICD-10-CM Diagnosis Code D78.34Postprocedural seroma of the spleen following other procedure

ICD-10-CM Codes›D50–D89›D78›D78

ICD-10-CM D78.34
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

D78.34 is a billable ICD-10-CM diagnosis code for postprocedural seroma of the spleen following other procedure. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 919 through 921. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 78 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative complications of the spleen.

Code Identity

ICD-10-CM Code
D78.34
Billable Status
Yes — Valid for Submission
Code Describes
Postprocedural seroma of the spleen following other procedure
Short Description
Postproc seroma of the spleen following other procedure
Parent Code
D78.3
Postprocedural hematoma and seroma of the spleen following a procedure

Code Classification

ChapterD50–D89Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
SectionD78Intraoperative and postprocedural complications of the spleen
CategoryD78Intraoperative and postprocedural complications of the spleen
This CodeD78.34Postprocedural seroma of the spleen following other procedure

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to D78.34: its own notes plus those printed at Chapter 3. A note printed at a category, block or chapter applies to every code under it.

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.

From Chapter 3 (D50-D89) Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism applies to 324 codes
  • 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)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name D78.34, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming D78.34: its condition is not part of those codes, and both may be reported when the patient has both.

  • Block T80-T88 Complications of surgical and medical care, not elsewhere classified
    intraoperative and postprocedural complications of specified body systems (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95.6-, J95.7, K91.6-, L76.-, M96.-, N99.-) names D78.-, which includes this code
  • T81 Complications of procedures, not elsewhere classified
    intraoperative and postprocedural complications of specific body system (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95, K91.-, L76.-, M96.-, N99.-) names D78.-, which includes this code

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.

CCSR BLD009
Postprocedural or postoperative complications of the spleen
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Spleen Diseases

Your spleen is an organ above your stomach and under your ribs on your left side. It is about as big as your fist. The spleen is part of your lymphatic system, which fights infection and keeps your body fluids in balance. It contains white blood cells that fight germs.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert D78.34 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
998.13 Seroma complicting proc
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement D78.34 replaces the following previously assigned code(s):

  • D78.22 - Postproc hemor/hemtom of the spleen following oth procedure
  • D78.22 - Postproc hemorrhage of the spleen following other procedure
FY 2019AddedAdded to the ICD-10-CM code setEffective October 1, 2018.
FY 2020–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About D78.34Overview

What is the ICD-10 code for postprocedural seroma of the spleen following other procedure?

The ICD-10-CM code for postprocedural seroma of the spleen following other procedure is D78.34 (sometimes written as D7834). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is D78.34 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report postprocedural seroma of the spleen following other procedure on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does D78.34 group to?

When postprocedural seroma of the spleen following other procedure is the principal diagnosis on an inpatient stay, it groups to MS-DRG 920, 919, 921, with relative weights from 0.6719 to 1.7624 depending on complications. Higher weights mean higher Medicare reimbursement.

Is D78.34 a CC or MCC?

CMS lists D78.34 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 78 closely related codes in its exclusion list.

What is the ICD-9 equivalent of D78.34?

Under the General Equivalence Mappings, postprocedural seroma of the spleen following other procedure converts to ICD-9-CM 998.13 (seroma complicting proc). The mapping is approximate, so confirm the match fits the documentation.