ICDcodes.org
FY2027

B00.9 — Herpesviral infection, unspecified

BillableUnspecified

Is B00.9 billable?

Yes, but B00.9 is an unspecified code. B00.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, B00.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting B00.9 — the more specific alternatives are listed below.

B00.9 at a glance

CodeB00.9
DescriptionHerpesviral infection, unspecified
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Which MS-DRGs does B00.9 group to?

B00.9 sits in MDC 09 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

  • 606Minor Skin Disorders with MCCmedical
  • 607Minor Skin Disorders without MCCmedical

How is B00.9 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to B00.9. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • Herpes, herpesvirus, herpetic
  • Herpes, herpesvirus, herpetic › human
  • Herpes, herpesvirus, herpetic › simplex

Inclusion terms

Alternative wording in documentation that is classified to B00.9.

  • Herpes simplex infection NOS

Excludes1 — never code together — inherited from B00

The conditions below can never be reported together with B00.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • congenital herpesviral infections (P35.2)

Use additional code — inherited from Chapter 1

Report an additional code alongside B00.9 to fully describe the condition. B00.9 is sequenced first.

  • code to identify resistance to antimicrobial drugs (Z16.-)

Excludes2 — not included here — inherited from Chapter 1

The conditions below are not part of B00.9, but a patient may have both at the same time. When documentation supports it, B00.9 and the excluded code may both be reported.

  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Excludes2 — not included here — inherited from B00

The conditions below are not part of B00.9, but a patient may have both at the same time. When documentation supports it, B00.9 and the excluded code may both be reported.

  • anogenital herpesviral infection (A60.-)
  • gammaherpesviral mononucleosis (B27.0-)
  • herpangina (B08.5)

How long has B00.9 existed?

B00.9 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which codes are confused with B00.9?

ICD-10-CM declares these codes mutually exclusive with B00.9 — exactly one of each pair can be correct for a given encounter.

Which conditions are coded to B00.9?

What other codes are in the B00 family? (8)