Pyelonephritis ICD-10-CM Codes
Dive into this comprehensive guide about Pyelonephritis ICD-10-CM codes. Learn about the most commonly used codes, their clinical definitions, and more.

What ICD-10 Codes Are Used for Pyelonephritis?
Understanding Pyelonephritis ICD codes is crucial for correct diagnosis and billing. Here are the standard codes for Pyelonephritis:
- N10 - Acute tubulo-interstitial nephritis. This code is used for acute pyelonephritis, a kidney inflammation typically due to a bacterial infection.
- N11.0 - Chronic tubulo-interstitial nephritis. This code applies to chronic obstructive pyelonephritis and reflux nephropathy involving long-term kidney inflammation.
- N11.1 - Chronic tubulo-interstitial nephritis in diseases classified elsewhere. This code is used when chronic pyelonephritis is secondary to another condition.
- N12 - Tubulo-interstitial nephritis, not specified as acute or chronic. This code is for unspecified cases of pyelonephritis where the duration of the condition (acute or chronic) is not stated.
- N13.6 - Pyonephrosis. This code is used for pyonephrosis, a condition where pus accumulates in the kidneys, typically due to pyelonephritis.
Which Pyelonephritis ICD Codes Are Billable?
Here are the Pyelonephritis ICD codes listed above, along with their billable status:
- N10 - Yes. The code is billable, and it pertains to acute pyelonephritis.
- N11.0 - Yes. This code represents billable chronic obstructive pyelonephritis and reflux nephropathy.
- N11.1 - Yes. This code is billable and is used for chronic pyelonephritis due to another condition.
- N12 - Yes. This billable code is for unspecified cases of pyelonephritis.
- N13.6 - Yes. This code is billable, denoting pyonephrosis, usually resulting from pyelonephritis.
Clinical Information
- Pyelonephritis, an infection or inflammation of the kidney, usually results from a urinary tract infection (UTI).
- Symptoms often include lower back or side pain, fever, frequent urination, and cloudy or strong-smelling urine.
- Acute pyelonephritis is an abrupt onset, while chronic pyelonephritis involves long-term inflammation, often due to recurrent UTIs.
- Untreated pyelonephritis can lead to severe complications, including kidney damage, abscesses, and sepsis.
- Diagnosis often involves urine tests, imaging tests, and sometimes kidney biopsies.
- Treatment typically includes antibiotics to treat the infection, pain medication, and hospitalization in severe cases.
Commonly asked questions
What is Pyelonephritis?
Pyelonephritis is an infection or inflammation of the kidney, typically resulting from a urinary tract infection.
What are the symptoms of Pyelonephritis?
Symptoms often include lower back or side pain, fever, frequent urination, and cloudy or strong-smelling urine.
How is Pyelonephritis treated?
Treatment typically involves antibiotics to clear the infection, pain medication to manage discomfort, and hospitalization in severe cases.
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