DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

N28 Other disorders of kidney and ureter, not elsewhere classified

  • Header · not billable

N28 is not billable. The category heads 10 billable codes in FY2027, grouped under 4 subdivisions.

Index → code

Where it sits

  1. Chapter 14 Diseases of the genitourinary system (N00-N99)
  2. N25-N29 Other disorders of kidney and ureter (N25-N29)
  3. N28 Other disorders of kidney and ureter, not elsewhere classified
Billable codes
10
Subdivisions
4
CC / MCC codes
4 / 0
HCC V28 codes
0
New FY2027
0
Index entries
139

Codes in N28

  1. N28.0
    Ischemia and infarction of kidney
    BillableCC
    Inclusion terms 5, Excludes1 3

    Inclusion terms

    • Renal artery embolism
    • Renal artery obstruction
    • Renal artery occlusion
    • Renal artery thrombosis
    • Renal infarct

    Excludes1

    • atherosclerosis of renal artery (extrarenal part) (I70.1) I70.1
    • congenital stenosis of renal artery (Q27.1) Q27.1
    • Goldblatt's kidney (I70.1) I70.1
  2. N28.1
    Cyst of kidney, acquired
    Billable
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Cyst (multiple) (solitary) of kidney (acquired)

    Excludes1

    • cystic kidney disease (congenital) (Q61.-) Q61
  3. N28.8
    Other specified disorders of kidney and ureter
    Header
    Excludes1 3

    Excludes1

    • hydroureter (N13.4) N13.4
    • ureteric stricture with hydronephrosis (N13.1) N13.1
    • ureteric stricture without hydronephrosis (N13.5) N13.5
  4. N28.81
    Hypertrophy of kidney
    Billable
  5. N28.82
    Megaloureter
    Billable
  6. N28.83
    Nephroptosis
    Billable
  7. N28.84
    Pyelitis cystica
    BillableCC
  8. N28.85
    Pyeloureteritis cystica
    BillableCC
  9. N28.86
    Ureteritis cystica
    BillableCC
  10. N28.89
    Other specified disorders of kidney and ureter
    Billable
  11. N28.9
    Disorder of kidney and ureter, unspecified
    Billable
    Inclusion terms 3, Excludes1 2

    Inclusion terms

    • Nephropathy NOS
    • Renal disease (acute) NOS
    • Renal insufficiency (acute)

    Excludes1

    • chronic renal insufficiency (N18.9) N18.9
    • unspecified nephritic syndrome (N05.-) N05

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

Notes that also apply

Block N25-N29 instructions (Excludes2 1): printed on the block page.

Chapter 14 instructions (Excludes2 8): printed on the chapter 14 page.

Index entries

  • Megaloureter → N28.82
  • Megaureter → N28.82
  • Nephroptosis → N28.83
  • Pyeloureteritis cystica → N28.85
  • Calicectasis → N28.89
  • Caliectasis → N28.89
  • Decapsulation, kidney → N28.89
  • Hyposthenuria → N28.89
  • Nephrorrhagia → N28.89
  • Periureteritis → N28.89
  • Pyoureter → N28.89
  • Thorn's syndrome → N28.89
  • Ureteritis → N28.89
  • Ureterocele → N28.89
  • Inefficiency, kidney → N28.9
  • Nephropathy → N28.9
  • Shutdown, renal → N28.9
  • Crisisrenal → N28.0
  • Embolism (multiple) (paradoxical)kidney (artery) → N28.0
  • Embolism (multiple) (paradoxical)renal (artery) → N28.0
  • Infarct, infarctionbrewer's (kidney) → N28.0
  • Infarct, infarctionkidney → N28.0
  • Infarct, infarctionrenal (embolic) (thrombotic) → N28.0
  • Ischemia, ischemickidney → N28.0
  • Ischemia, ischemicrenal → N28.0
  • Necrosis, necrotic (ischemic)kidney (bilateral) → N28.0
  • Occlusion, occludedrenal artery → N28.0
  • Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel)kidney (artery) → N28.0
  • Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel)renal (artery) → N28.0
  • Torsionkidney (pedicle) (leading to infarction) → N28.0
  • Cyst (colloid) (mucous) (simple) (retention)kidney → N28.1
  • Cyst (colloid) (mucous) (simple) (retention)paranephric → N28.1
  • Cyst (colloid) (mucous) (simple) (retention)peripelvic (lymphatic) → N28.1
  • Solitarycyst, kidney → N28.1
  • Hypertrophy, hypertrophickidney (compensatory) → N28.81
  • Dilatationureter (idiopathic) → N28.82
  • Displacement, displacedkidney (acquired) → N28.83
  • Prolapse, prolapsedkidney → N28.83
  • Ptosiskidney → N28.83
  • Ptosisrenal → N28.83

99 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

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