2026 ICD-10-CM Diagnosis Code S60.420SBlister (nonthermal) of right index finger, sequela

ICD-10-CM Codes›S00–T88›S60-S69›S60

ICD-10-CM S60.420S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S60.420S is a billable ICD-10-CM diagnosis code for blister (nonthermal) of right index finger, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 604 through 605. The code is exempt from POA reporting. Coders also document this condition as blister of finger of right hand with infection. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.

Code Identity

ICD-10-CM Code
S60.420S
Billable Status
Yes — Valid for Submission
Code Describes
Blister (nonthermal) of right index finger, sequela
Short Description
Blister (nonthermal) of right index finger, sequela
Same as the full description in the CMS dataset.
Parent Code
S60.420
Blister (nonthermal) of right index finger

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS60-S69Injuries to the wrist, hand and fingers
CategoryS60Superficial injury of wrist, hand and fingers
This CodeS60.420SBlister (nonthermal) of right index finger, sequela

Present on Admission (POA)Billing

S60.420S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Blister of finger of right hand with infection
  • Right hand blister with infection
  • Right index finger blister with infection
  • Superficial injury of right index finger
  • Traumatic blister of finger of right hand
  • Traumatic blister of index finger
  • Traumatic blister of right hand
  • Traumatic blister of right index finger

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Superficial injury of wrist, hand and fingers (S60). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ073
Injury, sequela
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Blisters

Blisters are fluid-filled sacs on the outer layer of your skin. They form because of rubbing, heat, or diseases of the skin. They are most common on your hands and feet.

The full article covers:

  • What are blisters?
  • What causes blisters?
  • What are the treatments for blisters?
  • Can blisters be prevented?

Read the full article at MedlinePlus

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

Convert S60.420S to ICD-9-CMHistory

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

ICD-9-CM
906.2 Late eff superficial inj
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S60.420SOverview

Is S60.420S (Blister (nonthermal) of right index finger) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report blister (nonthermal) of right index finger, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in S60.420S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the blister (nonthermal) of right index finger itself has resolved, not the original event.

What MS-DRG does S60.420S group to?

When blister (nonthermal) of right index finger, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 604, 605, with relative weights from 0.9160 to 1.4721 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S60.420S 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 blister (nonthermal) of right index finger, sequela on inpatient claims.

What is the ICD-9 equivalent of S60.420S?

Under the General Equivalence Mappings, blister (nonthermal) of right index finger, sequela converts to ICD-9-CM 906.2 (late eff superficial inj). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.