ICD-10 · PDGM grouping

N10-N16 — Renal tubulo-interstitial diseases

Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.1.26.

OASIS-E2 v1.00.0 · ingested 2026-04-26

Codes in range

No clinical group

A period cannot be grouped from these.

Barred as primary

CMS rejects these in the primary position.

Where these codes group

30 of the 35 codes in N10-N16 group to MMTA - Gastrointestinal tract and Genitourinary system, but the range is not uniform — it spreads across 2 clinical groups. A further 3 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.

Every code in N10-N16

Descriptions are CMS’s own, abbreviated as CMS abbreviates them.

Code	Description	Clinical group	Primary position
N10	Acute pyelonephritis	J	Accepted
N110	Nonobstructive reflux-associated chronic pyelonephritis	J	Accepted
N111	Chronic obstructive pyelonephritis	J	Accepted
N118	Other chronic tubulo-interstitial nephritis	J	Accepted
N119	Chronic tubulo-interstitial nephritis, unspecified	J	Accepted
N12	Tubulo-interstitial nephritis, not spcf as acute or chronic	J	Accepted
N130	Hydronephrosis with ureteropelvic junction obstruction	J	Accepted
N131	Hydronephrosis w ureteral stricture, NEC	J	Accepted
N132	Hydronephrosis with renal and ureteral calculous obstruction	J	Accepted
N1330	Unspecified hydronephrosis	J	Accepted
N1339	Other hydronephrosis	J	Accepted
N134	Hydroureter	J	Accepted
N135	Crossing vessel and stricture of ureter w/o hydronephrosis	J	Accepted
N136	Pyonephrosis	J	Accepted
N1370	Vesicoureteral-reflux, unspecified	J	Accepted
N1371	Vesicoureteral-reflux without reflux nephropathy	J	Accepted
N13721	Vesicoureter-reflux w reflux nephrop w/o hydrourt, unil	J	Accepted
N13722	Vesicoureter-reflux w reflux nephrop w/o hydrourt, bi	J	Accepted
N13729	Vesicoureter-reflux w reflux nephropathy w/o hydrourt, unsp	None	Cannot group
N13731	Vesicoureter-reflux w reflux nephrop w hydrourt, unil	A	Accepted
N13732	Vesicoureter-reflux w reflux nephrop w hydrourt, bilateral	J	Accepted
N13739	Vesicoureter-reflux w reflux nephropathy w hydroureter, unsp	None	Cannot group
N138	Other obstructive and reflux uropathy	J	Accepted
N139	Obstructive and reflux uropathy, unspecified	J	Accepted
N140	Analgesic nephropathy	J	Accepted
N1411	Contrast-induced nephropathy	J	Accepted
N1419	Nephropathy induced by other drug/meds/biol subst	J	Accepted
N142	Nephrop induced by unsp drug, medicament or biolg sub	J	Accepted
N143	Nephropathy induced by heavy metals	A	Accepted
N144	Toxic nephropathy, not elsewhere classified	J	Accepted
N150	Balkan nephropathy	J	Accepted
N151	Renal and perinephric abscess	J	Accepted
N158	Other specified renal tubulo-interstitial diseases	J	Accepted
N159	Renal tubulo-interstitial disease, unspecified	J	Accepted
N16	Renal tubulo-interstitial disord in diseases classd elswhr	None	Cannot group

Source: CMS HH PPS Grouper Software v07.1.26, effective 2026-04-01. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.

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N10-N16 — Renal tubulo-interstitial diseases

Where these codes group

Every code in N10-N16

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