N35.8 ICD-10-CM Code: Other urethral stricture

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for N35.8 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on N35.8 itself; “inherited from” names the category or block whose note applies here.

Coder workflow for N35.8

MedCoder structured workflow — derived from this code’s own official record

Before you code N35.8

1. N35.8 is not reportable as written. Select the more specific code beneath it that the documentation supports. Codes are reported to the highest level of specificity the classification provides (Guidelines I.B.2).

   ReviewN35.81, N35.82

   See the relationships section · Guide: How to choose an ICD-10-CM code →

2. “Other” (NEC) means the condition is specified in the record but no dedicated code captures it. Confirm the documented form is not one a sibling code names before settling on N35.8; if the record states no specifics at all, the unspecified sibling applies instead. “Other” codes are for documented conditions the classification gives no specific code; “unspecified” codes are for records lacking the detail (Guidelines I.A.9.a, I.A.9.b).

   ReviewN35.0

   See the relationships section · Guide: Other vs unspecified (NEC vs NOS) →

3. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with N35.8. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

   See the official tabular notes

Choose the right path

1. Does the documentation support one of the more specific codes beneath N35.8?
   Yes → Select that code and continue the checks below on its own page.
   No → N35.8 cannot be reported as written; query for the specificity its subcategory needs.

   ReviewN35.81, N35.82

2. Does the documentation support a condition named in N35.8’s Excludes1 note?
   Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
   No → Continue.

   ReviewN99.1, Q64.3

Consider N35.8. Then confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement

Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).

Any detail beyond this code’s title

What the record states that a more specific sibling code would capture — or its absence, which itself supports the unspecified code.

Official instructions as workflow

• Excludes1 — check before selecting N35.8(2 notes)

  Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with N35.8: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

  CompareN99.1, Q64.3

  See the official tabular notes · Guidelines I.A.12.a

• Excludes2 — not part of N35.8(3 notes)

  Coding workflow: The conditions named in this note are not included in N35.8. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

  CompareO08.8, O23, O75.3, O86.2

  See the official tabular notes · Guidelines I.A.12.b

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Don’t confuse N35.8 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of N35.8 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

• N99.1— Excludes1 conflict (Excludes1 — generally not reported together)

  Not coded here — the tabular list excludes this pair for the same encounter.

  Not reported together with this code, except where the two conditions are documented as unrelated.

  What moves you there: Documentation of postprocedural urethral stricture moves the case to N99.1; the two are not reported together unless documented as unrelated.

  Full comparison: N35.8 vs N99.1 →

• Q64.3— Excludes1 conflict (Excludes1 — generally not reported together)

  Not coded here — the tabular list excludes this pair for the same encounter.

  Not reported together with this code, except where the two conditions are documented as unrelated.

  What moves you there: Documentation of congenital urethral stricture moves the case to Q64.3; the two are not reported together unless documented as unrelated.

  Full comparison: N35.8 vs Q64.3 →

• N35.9— Specificity relationship (Review)

  Overlapping diagnoses in the same category.

  Overlapping codes in the same category — the documentation decides which is the more specific fit.

  What moves you there: A record that documents no more than “Urethral stricture, unspecified” takes N35.9; specificity in the record moves it back here.

  Full comparison: N35.8 vs N35.9 →

• O00— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of abortion or ectopic or molar pregnancy adds O00; it is not part of this code and both may be reported when both are documented.

  Full comparison: N35.8 vs O00 →

• O07— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of abortion or ectopic or molar pregnancy adds O07; it is not part of this code and both may be reported when both are documented.

  Full comparison: N35.8 vs O07 →

• O08.8— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of abortion or ectopic or molar pregnancy adds O08.8; it is not part of this code and both may be reported when both are documented.

  Full comparison: N35.8 vs O08.8 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Verify Before Coding

• Not billable as written — a more specific code is required: N35.811, N35.812, N35.813, N35.814, N35.816.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Clinical classification (AHRQ CCSR):GEN007 — Other specified and unspecified diseases of bladder and urethra (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Other specified and unspecified diseases of bladder and urethra).

N35.016 — Post-traumatic urethral stricture, male, overlapping sites, N35.021 — Urethral stricture due to childbirth, N35.028 — Other post-traumatic urethral stricture, female, N35.111 — Postinfective urethral stricture, not elsewhere classified, male, meatal, N35.112 — Postinfective bulbous urethral stricture, not elsewhere classified, male, N35.113 — Postinfective membranous urethral stricture, not elsewhere classified, male, N35.114 — Postinfective anterior urethral stricture, not elsewhere classified, male, N35.116 — Postinfective urethral stricture, not elsewhere classified, male, overlapping sites, N35.119 — Postinfective urethral stricture, not elsewhere classified, male, unspecified, N35.12 — Postinfective urethral stricture, not elsewhere classified, female, N35.811 — Other urethral stricture, male, meatal, N35.812 — Other bulbous urethral stricture, male, N35.813 — Other membranous urethral stricture, male, N35.814 — Other anterior urethral stricture, male, N35.816 — Other urethral stricture, male, overlapping sites, N35.819 — Other urethral stricture, male, unspecified site, N35.82 — Other urethral stricture, female, N35.9 — Urethral stricture, unspecified, N35.911 — Unspecified urethral stricture, male, meatal, N35.912 — Unspecified bulbous urethral stricture, male, +43 more

Contextual Map

Every relationship of N35.8 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

• N00-N99 — Chapter 14: Diseases of the Genitourinary System (N00-N99) (N00-N99)[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• N30-N39 — Other diseases of the urinary system[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Clinical classification (CCSR)

• GEN007 — Other specified and unspecified diseases of bladder and urethra[CCSR]— AHRQ CCSR for ICD-10-CM Diagnoses (HCUP)

Nearest codes (38)

• N35 — Urethral stricture[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• N35.0 — Post-traumatic urethral stricture[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• N35.01 — Post-traumatic urethral stricture, male[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• N35.010 — Post-traumatic urethral stricture, male, meatal[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• N35.011 — Post-traumatic bulbous urethral stricture[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• N35.012 — Post-traumatic membranous urethral stricture[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• N35.013 — Post-traumatic anterior urethral stricture[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• N35.014 — Post-traumatic urethral stricture, male, unspecified[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• and 30 more

Change history (2)

• FY2019 — Became a non-billable header[Change history]— CMS release files (code change ledger) · icd10cm-fy2019
• and 1 more

Common coding questions

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data

CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page

Claim edits Official source data

CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page

Change history and date-of-service validity Official source data

CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page

Comparisons, relationships and the contextual map MedCoder structured relationship

Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears

Summary and FAQ answers MedCoder explanation

Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Nearest Codes in This Family

Official ICD-10-CM classifications closest to N35.8 in its code family, with their registry titles.

• N35.113 — Postinfective membranous urethral stricture, not elsewhere classified, male
• N35.114 — Postinfective anterior urethral stricture, not elsewhere classified, male
• N35.116 — Postinfective urethral stricture, not elsewhere classified, male, overlapping sites
• N35.119 — Postinfective urethral stricture, not elsewhere classified, male, unspecified
• N35.12 — Postinfective urethral stricture, not elsewhere classified, female
• N35.81 — Other urethral stricture, male
• N35.811 — Other urethral stricture, male, meatal
• N35.812 — Other bulbous urethral stricture, male
• N35.813 — Other membranous urethral stricture, male
• N35.814 — Other anterior urethral stricture, male

View all codes in the N35 family