ICD-10-CM Code First Notes · Chapter 14 · FY 2027 N00-N99

Code First Notes in Chapter 14: Diseases of the genitourinary system ICD-10-CM

A Code First note means the underlying condition named in the note is sequenced before this code. In Chapter 14 (N00-N99), notes printed in the chapter name other codes 39 times, and Code First Notes anywhere in the Tabular List name the chapter’s codes 11 times, covering 6 distinct codes, categories and ranges. Switch views to read the list either way.

✓ From the official FY 2027 ICD-10-CM Tabular ListDefinitions follow the Official Guidelines, Section I.A
39
References in Its Notes
11
References to Its Codes
6
Chapter Codes Named
N00-N99
Chapter 14
Chapter 14

Code First Notes by the code that carries the note

12 of 12 shown
  • N08 Glomerular disorders in diseases classified elsewhere
  • N13.8 Other obstructive and reflux uropathy
    • enlarged prostate (N40.1)
  • N14 Drug- and heavy-metal-induced tubulo-interstitial and tubular conditions applies to 6 codes
    • poisoning due to drug or toxin, if applicable (T36-T65 with fifth or sixth character 1-4)
  • N16 Renal tubulo-interstitial disorders in diseases classified elsewhere
  • N18 Chronic kidney disease (CKD) applies to 9 codes
  • N22 Calculus of urinary tract in diseases classified elsewhere
  • N29 Other disorders of kidney and ureter in diseases classified elsewhere
  • N33 Bladder disorders in diseases classified elsewhere
  • N51 Disorders of male genital organs in diseases classified elsewhere
  • N64.1 Fat necrosis of breast
    • breast necrosis due to breast graft (T85.898)
  • N77.0 Ulceration of vulva in diseases classified elsewhere
    • Behçet's disease (M35.2)
  • N77.1 Vaginitis, vulvitis and vulvovaginitis in diseases classified elsewhere

The first view lists notes printed in this chapter (a note on a category or block applies to every code beneath it). The second lists codes of this chapter named by Code First Notes anywhere in the Tabular List, including notes in other chapters.

Questions About Code First Notes

What does a Code First note mean?

A Code First note means the underlying condition named in the note is sequenced before the code that carries the note. Under the etiology/manifestation convention, a “code first” note appears at the manifestation code and a “use additional code” note at the etiology code (Section I.A.13). The FY 2027 Tabular List has 810 of them; 600 name other codes, with 736 references to 429 distinct codes, categories and ranges.

Can a code with a Code First note be the principal diagnosis?

Not when it is a manifestation code. Codes titled “in diseases classified elsewhere” are never permitted as the first-listed or principal diagnosis; they must follow the underlying condition. The etiology and manifestation page lists them all.

Related References

ICD-10-CM Official GuidelinesICD-10-CM Code LookupICD-10-CM Codes ListCode Lists by Tag

Source: FY 2027 ICD-10-CM Tabular List (CMS and NCHS) and the ICD-10-CM Official Guidelines for Coding and Reporting FY 2027, Section I.A. ICD List is not affiliated with CMS or NCHS.