ICD-10-CM 2027
ICD-10 code for pyelonephritis
Choose a code from the options below based on the documentation.
From the official ICD-10-CM alphabetic index entry “Pyelonephritis”. Page updated September 29, 2026.
About coding pyelonephritis
The official ICD-10-CM index doesn't give a single default code for pyelonephritis; the code depends on the details below.
More specific pyelonephritis codes (official index)
- with
- calculus
- with hydronephrosis N13.6 — Pyonephrosis
- contracted kidney N11.9 — Chronic tubulo-interstitial nephritis, unspecified
- acute N10 — Acute pyelonephritis
- calculous
- with hydronephrosis N13.6 — Pyonephrosis
- chronic N11.9 — Chronic tubulo-interstitial nephritis, unspecified
- with calculus
- with hydronephrosis N13.6 — Pyonephrosis
- associated with ureteral obstruction or stricture N11.1 — Chronic obstructive pyelonephritis
- nonobstructive N11.8 — Other chronic tubulo-interstitial nephritis
- with reflux (vesicoureteral) N11.0 — Nonobstructive reflux-associated chronic pyelonephritis
- obstructive N11.1 — Chronic obstructive pyelonephritis
- specified NEC N11.8 — Other chronic tubulo-interstitial nephritis
- in (due to)
- brucellosis A23.9 — Brucellosis, unspecified
- cryoglobulinemia (mixed) D89.1 — Cryoglobulinemia
- cystinosis E72.04 — Cystinosis
- diphtheria A36.84 — Diphtheritic tubulo-interstitial nephropathy
- glycogen storage disease E74.09 — Other glycogen storage disease
- leukemia NEC C95.9 — Leukemia, unspecified
- lymphoma NEC C85.90 — Non-Hodgkin lymphoma, unspecified, unspecified site
- multiple myeloma C90.0 — Multiple myeloma
- obstruction N11.1 — Chronic obstructive pyelonephritis
- Salmonella infection A02.25 — Salmonella pyelonephritis
- sarcoidosis D86.84 — Sarcoid pyelonephritis
- sepsis A41.9 — Sepsis, unspecified organism
- Sjögren's disease M35.04 — Sjogren syndrome with tubulo-interstitial nephropathy
- toxoplasmosis B58.83 — Toxoplasma tubulo-interstitial nephropathy
- transplant rejection T86.91 — Unspecified transplanted organ and tissue rejection
- Wilson's disease E83.01 — Wilson's disease
- nonobstructive N12 — Tubulo-interstitial nephritis, not specified as acute or chronic
- with reflux (vesicoureteral) N11.0 — Nonobstructive reflux-associated chronic pyelonephritis
- chronic N11.8 — Other chronic tubulo-interstitial nephritis
- syphilitic A52.75 — Syphilis of kidney and ureter
Common questions about pyelonephritis ICD-10 codes
What is the ICD-10 code for acute pyelonephritis?
- N10 — Acute pyelonephritis.
What is the ICD-10 code for chronic pyelonephritis?
- N11.9 — Chronic tubulo-interstitial nephritis, unspecified.
What is the ICD-10 code for nonobstructive pyelonephritis?
- N12 — Tubulo-interstitial nephritis, not specified as acute or chronic.
What is the ICD-10 code for syphilitic pyelonephritis?
- A52.75 — Syphilis of kidney and ureter.