ICD-10 · PDGM grouping
N14 Drug- and heavy-metal-induced tubulo-interstitial and tubular conditions
All 6 codes in the N14 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
6
Can lead a claim
6
Cannot lead a claim
0
What CMS assigns to N14
All 6 codes group to MMTA - Gastrointestinal tract and Genitourinary system (5) and MMTA - Other (1). None of the 6 is assigned a comorbidity subgroup. Every code can lead a claim. CMS attaches a code-first note to all 6.
Code first
CMS grouper convention 13, on all 6 codes. Code first:
- poisoning due to drug or toxin, if applicable (T36-T65 with fifth or sixth character 1-4)
Every code in N14
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| N14.0 | Analgesic nephropathy | Can lead a claim, code first applies | J | None |
| N14.1 Nephropathy induced by other drugs, medicaments and biological substances | ||||
| N14.11 | Contrast-induced nephropathy | Can lead a claim, code first applies | J | None |
| N14.19 | Nephropathy induced by other drugs, medicaments and biological substancesCMS: Nephropathy induced by other drug/meds/biol subst | Can lead a claim, code first applies | J | None |
| N14.2 | Nephropathy induced by unspecified drug, medicament or biological substanceCMS: Nephrop induced by unsp drug, medicament or biolg sub | Can lead a claim, code first applies | J | None |
| N14.3 | Nephropathy induced by heavy metals | Can lead a claim, code first applies | A | None |
| N14.4 | Toxic nephropathy, not elsewhere classified | Can lead a claim, code first applies | J | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. 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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