Chapter 21 Genitourinary System N00-N99 - [PDF Document] (2024)

Chapter 14Genitourinary System

N00-N99

Presented by:

Jennifer Kurkulonis

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The Urinary System

Diseases of the genitourinary system are classified in chapter 14 of ICD-10-CM, except those that are classified by etiology, such as:

certain easily transmissible infections

neoplastic diseases

conditions complicating pregnancy, childbirth, and the puerperium

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Terms To Know Acute kidney failure

Sudden failure of renal function following a severe insult to the kidneys

Chronic kidney disease

Long-term disability of the renal function

Nephropathy

General term indicating that renal disease is present

Ureter

Carries urine from the kidneys to the bladder

Urethra

Carries urine from the bladder to the outside of the body

Remember – It is important to distinguish between chronic kidney disease, acute kidney failure and acute kidney injury.

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Note: Coders should take extra care to correctly identify the correct term when “urethra” and “ureter” are involved as they are easily and frequently confused.

Infections Of The Genitourinary Tract• Physicians often use the term "urinary tract infection (UTI)" when referring to conditions such

as:

Urethritis N34.1, N34.2 (Lower urinary tract)

Cystitis N30.0 – N30.4-, N30.8- and N30.9- (Lower urinary tract) * Requires 5th character “0” without hematuria or “1” with hematuria

Pyelonephritis N10 – N12 (Upper urinary tract)

• If diagnosis given is “UTI” assign code N39.0 urinary tract infection, site not specified.

• When there is no subterm for the organism in the index, the code for the condition is assigned, with an additional code from categories B95-B97 for the organism.

Cystitis due to E.coli - N30.90 and B96.20

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Infections Of The Genitourinary Tract

• Urinary tract infections that develop following surgery are rarely true postoperative infections – be sure to query the physician for clarification, especially if the procedure involves the urinary tract.

• If the UTI is documented as related to the presence of an implant, a graft, or a device such as an indwelling or a suprapubic catheter;

code T83.5- or T83.6 is assigned; infection and inflammatory reaction d/t an indwelling catheter

and code N39.0, Urinary tract infection, site not specified

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Hematuria• Hematuria refers to blood in the urine. • Gross hematuria is hematuria that is so plentiful that it is visible to the naked eye. • Microscopic hematuria refers to blood in the urine visible only under a microscope.

• If genitourinary conditions have hematuria as an integral associated symptom, the hematuria is not coded, just the condition responsible for the hematuria.

• A certain amount of hematuria is expected following a urinary tract procedure or a prostatectomy. This is not considered a postoperative complication, and no code is assigned unless the bleeding is excessive or persistent.

• Codes in category N30, Cystitis, provide combination codes with a fifth character identifying whether hematuria is present or not.

Hematuria due to renal calculus – only N20.0 calculus of kidney, is assigned.

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ICD-9 ICD-9 ICD-10 ICD-10

599.71 Gross Hematuria R31.0 Gross Hematuria

599.72 Microscopichematuria

R31.2R31.1

Other microscopicBenign essential microscopic

599.70 Unspecified R31.9 Unspecified

Urinary IncontinenceStress incontinence causes involuntary urine loss with physical strain such as coughing or sneezing. Although it occurs in both male and female patients, it occurs more frequently in women: N39.3.

Typically this develops in women a result of physical changes brought on by earlier childbearing.

Prostate surgery is the primary cause of incontinence in men.

Urinary incontinence due to cognitive impairment, severe physical disability, or immobility is coded to Functional urinary incontinence: R39.81

When more than one type of incontinence is present code Mixed incontinence (male or female) : N39.46

When the underlying cause of incontinence is known, the code for that condition should be sequenced first.

Code N32.81 should also be assigned for any overactive bladder associated with conditions in codes N39.3 and N39.4-.

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Urinary Incontinence

N39.3 Stress

N39.41 Urge

N39.42 Without sensory awareness

N39.43 Post void dribbling

N39.44 Nocturnal enuresis (does not include childhood bedwetting)

N39.45 Continuous leakage

N39.46 Mixed (stress and urge)

N39.490 – N39.498 Overflow, reflex, total

R39.81 Functional

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Exercise 14.1

1. Acute pyelonephritis due to Helicobacter pylori

infection

2. Nocturnal urinary incontinence

3. Benign essential microscopic hematuria

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Exercise 14.1 Answers

1. Acute pyelonephritis due to Helicobacter pyloriinfection

N10 + B96.81 (see pyelonephritis, acute)

2. Nocturnal urinary incontinence

N39.44 (see incontinence, urine, nocturnal or enuresis, nocturnal)

3. Benign essential microscopic hematuria

R31.1 (see hematuria, benign, essential microscopic)

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Chronic Kidney Disease• CKD develops as a complication of other diseases - the most common

causes being diabetes mellitus and hypertension, however, there are many others causes of CKD:

glomerulonephritis

nephrosis

interstitial nephritis

systemic lupus erythematosus

obstructive uropathy

polycystic kidney disease

• Patients usually live for many years with chronic kidney disease. When kidney involvement becomes so extensive that kidney function can no longer keep up with the body's needs, dialysis is usually required.

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Stages of CKD (N18)• ICD-10-CM classifies CKD on the basis of severity. Chronic kidney disease has been

categorized into five stages by a 4th character subcategory for level specification .

• With category N18 code first any associated diabetic or hypertensive CKD.

• Use additional code to identify renal transplant status Z94.0 or dialysis status Z99.2.

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Chronic renal disease, chronic renal insufficiency, and chronic renal failure are assigned to code N18.9.

Category Subcategory Description 4th Character

N18 CKD, stage 1 1

N18 CKD, stage 2 (mild) 2

N18 CKD, stage 3 (moderate) 3

N18 CKD, stage 4 (severe) 4

N18 CKD, stage 5 5

N18 End stage renal disease 6

N18 CKD, unspecified 9

End-Stage Renal Disease (N18.6)

• ESRD is a progression of chronic kidney disease and is defined by clinicians as the point at which regular dialysis sessions or a kidney transplant is required to maintain life.

• End-stage renal disease is a complex syndrome characterized by a variable and inconsistent group of biochemical and clinical changes that affect:

volume regulation acid-base balance electrolyte balance excretion of waste products several endocrine functions.

• If the physician documents both a stage of CKD and ESRD only code N18.6 (End stage renal disease) would be assigned.

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Acute Kidney Failure

• Acute kidney failure is very different from CKD, it is not a phase of the same condition. Chronic kidney disease is a long-term inability of the kidneys to function adequately; acute kidney failure is the sudden cessation of renal function following severe insult to normal kidneys. These include:

Toxic agents Traumatic or surgical shock Tissue destruction due to injury or surgery Sepsis Variety of other conditions

• Acute kidney injury is a phrase used by some physicians to refer to acute kidney failure. Care should be taken to determine whether the documentation refers to a traumatic injury to the kidney such as contusion or laceration (which would be assigned to a code in subcategory S37.0) or to a non-traumaticevent, which is actually acute kidney failure.

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Acute Kidney Failure

N17.0 With tubular necrosis

N17.1 With acute cortical necrosis

N17.2 With medullary necrosis

N17.8 Other acute kidney failure

N17.9 Unspecified Non-traumatic acute kidney injuryAcute kidney injury (defaults to non-traumatic)

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Acute Kidney Insufficiency N28.9• Acute renal insufficiency is an early stage of renal impairment, but is not

considered renal failure. Evidenced by:

– Diminished creatinine clearance– Mildly elevated serum creatinine– Elevated BUN

Treatment varies, depending on the underlying cause, but serious attention is given to prevent its progression to renal failure.

• Physicians sometimes use the terms "renal insufficiency" and "renal failure" interchangeably, but ICD-10-CM classifies these terms to different codes.

If the renal insufficiency is due to a procedure: Other postprocedural complications and disorders of GU system: N99.89

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Kidney Disease with Hypertension I12ICD-10-CM presumes a relationship when a patient has both chronic kidney disease or renal sclerosis and hypertension.

I12.0 - Use additional code to identify the stage of chronic kidney disease (N18.5, N18.6)

I12.9 - Use additional code to identify the stage of chronic kidney disease (N18.1 – N18.4, N18.9)

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I12- Hypertensive Chronic Kidney Disease

I12. 0 With Stage 5 CKD or ESRD

I12.9 With Stage 1-4 CKD or unspecified

Note: Acute Kidney Failure is not caused by hypertension and is not included in the hypertensive kidney disease codes. When both Acute Kidney Failure and hypertension are present, assign a code for both conditions. Ex: Acute kidney failure and hypertension code: N17.9 and I10

Kidney Disease with Diabetes Mellitus• Diabetic kidney complications are coded to E08-E13

Kidney disease sometimes results from both hypertension and diabetes mellitus. In this situation, the combination code from category I12 or category I13 and a code from category E08-E13 with 4th character 2 is assigned.

.21 for diabetic nephropathy (for example: Type I diabetes: E10.21)

.22 for chronic kidney disease

.29 for other kidney complication

• A code from category N18 is assigned to specify the stage of chronic kidney disease.

Chronic kidney disease stage IV due to hypertension and type 1 diabetes mellitus:

I12.9 Hypertensive CKD, stage 1-4

E10.22 Type 1 Diabetes Mellitus with diabetic CKD

N18.4 CKD stage 4

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Exercise 14.2

1. Hypertensive chronic kidney disease with stage 5 renal failure

2. Type 2 Diabetes Mellitus with stage 3 renal failure

3. Acute kidney failure with hypertension

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Exercise 14.2 Answers

1. Hypertensive chronic kidney disease with stage 5 renal failure

I12.0 + N18.5 (see disease, kidney, chronic)

2. Type 2 Diabetes Mellitus with CKD, stage 3

E11.22 + N18.3 (see disease, renal, diabetic) (see diabetes type 2 with chronic kidney disease)

3. Acute kidney failure with hypertension

N17.9 + I10 (see failure, acute)

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Enlarged (BPH)/Nodular Prostate N40• Benign prostatic hypertropy is classified to category N40, Enlarged prostate, with fourth

characters providing additional specificity regarding the presence or absence of lower urinary tract symptoms.

• N40.0 Enlarged prostate without lower urinary tract symptoms• N40.1 Enlarged prostate with lower urinary tract symptoms

• N40.2 Nodular prostate without lower urinary tract symptoms• N40.3 Nodular prostate with lower urinary tract symptoms

• Use additional code for associated symptoms when specified:

incomplete bladder emptying R39.14 nocturia R35.1 straining on urination R39.16 urinary frequency R35.0 urinary hesitancy R39.11 urinary incontinence N39.4- urinary obstruction N13.8 urinary retention R33.8 urinary urgency R39.15 weak urinary stream R39.12

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Inflammatory diseases of Prostate N41

Category N41 classifies inflammatory disease of the prostate as follows:

N41.0 Acute prostatitisN41.1 Chronic prostatitisN41.2 Abscess of prostate N41.3 ProstatocystitisN41.4 Granulomatous prostatitisN41.8 Other inflammatory diseases of prostate N41.9 Inflammatory disease of prostate, unspecified

(Prostatitis NOS)

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GU Malignancies

C51-C58 Female genital organs (will cover in ObGyn)

C60-C63 Male genital organs

C60.- Penis

C61.- Prostate

C62.- Testis

C63.- Other/unspecified

C64-68 Urinary Tract

C64.- Kidney except renal pelvis

C65.- Renal pelvis

C66.- Ureter

C67.- Bladder

C68.- Other/unspecified

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Urinary Calculus N20

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Urinary calculi are relatively common and often pass without surgery.

N20.0 Calculus of kidney;Nephrolithiasis, staghorn calculus

N20.1 Calculus of ureter

N20.2 Calculus of kidney with calculus of ureter

N20.9 Urinary calculus, unspecified

GU Signs and SymptomsR30.- Pain with micturation

R31.- Hematuria

R32.- Urinary incontinence

R33 Retention of Urine R33.0 Drug induced

R33.8 Other

R33.9 Unspecified

R34 Anuria/Oliguria

R35 Polyuria R35.0 Frequency of micturation

R35.1 Nocturia

R35.8 Other polyuria

R36.- Urethral discharge

R37 Sexual dysfunction, unsp

R39.- Other/unspec symptoms Urgency, straining, hesitancy

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Exercise 14.3

1. Benign prostatic hypertrophy with urinary obstruction (BPH w/LUTS)

2. Cancer of posterior wall of urinary bladder (primary)

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Exercise 14.3 Answers

1. Benign prostatic hypertrophy with urinary obstruction (BPH w/LUTS)

N40.1 + N13.8 (see hypertrophy, prostate) (see enlarged prostate)

2. Cancer of posterior wall of urinary bladder (primary)

C67.4 (see cancer)

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