ICD-10-CM Diagnosis code N77.1

Vaginitis, vulvitis and vulvovaginitis in diseases classified elsewhere

Code Details

Body System Diseases of the genitourinary system
Chronic Condition No

Coding Guidelines for N77.1

N77.1 is a valid ICD-10-CM diagnosis code meaning 'Vaginitis, vulvitis and vulvovaginitis in diseases classified elsewhere'.

Purely Excluded Conditions

These diag codes should never be used at the same time as N77.1 because these conditions cannot occur together:

  • candidal vulvovaginitis (B37.3-)
  • chlamydial vulvovaginitis (A56.02)
  • gonococcal vulvovaginitis (A54.02)
  • herpesviral [herpes simplex] vulvovaginitis (A60.04)
  • trichomonal vulvovaginitis (A59.01)
  • tuberculous vulvovaginitis (A18.18)
  • vulvovaginitis in early syphilis (A51.0)
  • vulvovaginitis in late syphilis (A52.76)

Must Code Etiology Before Coding N77.1

Some conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation.

N77.1 is a manifestation code. For it to be valid, one of the following etiology codes must also be coded first:

  • underlying disease, such as:
  • pinworm (B80)

Complications & Comorbid Conditions (CC/MCC) Rules for N77.1

N77.1 is not a CC or MCC.

DRG Mapping Rules for N77.1

Diagnostic codes are the first step in the DRG mapping process.

The patient's primary diagnostic code is the most important. Assuming the patient's primary diagnostic code is N77.1, look in the list below to see which MDC's "Assignment of Diagnosis Codes" is first. That is the MDC that the patient will be grouped into.

From there, check the subsections of the MDC listed. The patient will be mapped into the first subsection for which the treatment performed on the patient meet the listed requirements of that subsection.

DRG grouping rules are adjusted each year, so make sure to check the rules for the fiscal year of the patient's discharge date.

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