2027 ICD-10-CM Diagnosis Code U09.9Post COVID-19 condition, unspecified

ICD-10-CM Codes›U00–U85›U00-U49›U09

ICD-10-CM U09.9
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

U09.9 is a billable ICD-10-CM diagnosis code for post COVID-19 condition, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 951. Coders also document this condition as chronic post-COVID-19 syndrome. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Coronavirus disease – 2019 (COVID-19).

Code Identity

ICD-10-CM Code
U09.9
Billable Status
Yes — Valid for Submission
Code Describes
Post COVID-19 condition, unspecified
Short Description
Post COVID-19 condition, unspecified
Same as the full description in the CMS dataset.
Parent Code
U09
Post COVID-19 condition

Code Classification

ChapterU00–U85Codes for Special Purposes
SectionU00-U49Provisional assignment of new diseases of uncertain etiology or emergency use
CategoryU09Post COVID-19 condition
This CodeU09.9Post COVID-19 condition, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic post-COVID-19 syndrome
  • Post-acute COVID-19

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to U09.9.

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.

  • Post-acute sequela of COVID-19

Code First

The underlying condition named in the note is sequenced before this code.

  • the specific condition related to COVID-19 if known, such as:
  • chronic respiratory failure (J96.1-)
  • loss of smell (R43.8)
  • loss of taste (R43.8)
  • multisystem inflammatory syndrome (M35.81)
  • pulmonary embolism (I26.-)
  • pulmonary fibrosis (J84.10)

Notes

General instructions on how these codes are used.

  • This code enables establishment of a link with COVID-19.
  • This code is not to be used in cases that are still presenting with active COVID-19. However, an exception is made in cases of re-infection with COVID-19, occurring with a condition related to prior COVID-19.

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name U09.9, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming U09.9: they are not reported together with it, unless the two conditions are unrelated.

  • Z86.16 Personal history of COVID-19
    post COVID-19 condition (U09.9)

Excludes2 1

These codes carry an Excludes2 note naming U09.9: its condition is not part of those codes, and both may be reported when the patient has both.

  • B94.9 Sequelae of unspecified infectious and parasitic disease
    post COVID-19 condition (U09.9)

Use Additional Code 2

These codes say to use an additional code from the note, and U09.9 is one of the codes named.

  • G93.3 Postviral and related fatigue syndromes
    code, if applicable, for post COVID-19 condition, unspecified (U09.9)
  • M35.81 Multisystem inflammatory syndrome
    post COVID-19 condition (U09.9)

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 INF012
Coronavirus disease – 2019 (COVID-19)
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

COVID-19 (Coronavirus Disease 2019)

COVID-19 (coronavirus disease 2019) is an illness caused by a virus. This virus is a coronavirus called SARS-CoV-2. It spreads when a person who has the infection breathes out droplets and very small particles that contain the virus.

Read the full article at MedlinePlus

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

Code History & ChangesHistory

Replacement U09.9 replaces the following previously assigned code(s):

  • B94.9 - Sequelae of unspecified infectious and parasitic disease
FY 2022AddedAdded to the ICD-10-CM code setEffective October 1, 2021.
FY 2023–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About U09.9Overview

What is the ICD-10 code for post COVID-19 condition, unspecified?

The ICD-10-CM code for post COVID-19 condition, unspecified is U09.9 (sometimes written as U099). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is U09.9 (Post COVID-19 condition) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report post COVID-19 condition, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does U09.9 group to?

When post COVID-19 condition, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 951 (other Factors Influencing Health Status), which carries a relative weight of 0.5574. Higher weights mean higher Medicare reimbursement.

What is coded first with U09.9?

The Code First note reads: the specific condition related to COVID-19 if known, such as: chronic respiratory failure (J96.1-); loss of smell (R43.8); loss of taste (R43.8); multisystem inflammatory syndrome (M35.81); pulmonary embolism (I26.-); and 1 more listed in the Instructional Notes section. When one of these applies, it is sequenced before U09.9.