D86.84 ICD-10-CM Code: Sarcoid pyelonephritis

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for D86.84 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 D86.84 itself; “inherited from” names the category or block whose note applies here.

This page already reflects the FY2027 tabular note taking effect October 1, 2026.

Coder workflow for D86.84

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

Before you code D86.84

1. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with D86.84. 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 a condition named in D86.84’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.

   ReviewM35.9, D71

Consider D86.84. 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).

Official instructions as workflow

• Excludes1 — check before selecting D86.84(2 notes)

  Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with D86.84: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

  CompareM35.9, D71

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

• Excludes2 — not part of D86.84(1 note)

  Coding workflow: The conditions named in this note are not included in D86.84. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

  CompareB20

  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.

Indexed Clinical Terms (4)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

• Disorder (of), tubulo-interstitial (in), sarcoidosis
• Pyelonephritis, in (due to), sarcoidosis
• Sarcoid, pyelonephritis
• Sarcoidosis, with, tubulo-interstitial nephropathy

Official Coding Guidelines

No excerpt in the ICD-10-CM Official Guidelines names this code specifically. Its chapter carries only this chapter-wide note:

Don’t confuse D86.84 with…

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

The codes most likely to be picked instead of D86.84 — 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.

• M35.9— 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 autoimmune disease (systemic) NOS moves the case to M35.9; the two are not reported together unless documented as unrelated.

  Full comparison: D86.84 vs M35.9 →

• D71— 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 functional disorders of polymorphonuclear neutrophils moves the case to D71; the two are not reported together unless documented as unrelated.

  Full comparison: D86.84 vs D71 →

• B20— 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 human immunodeficiency virus [HIV] disease adds B20; it is not part of this code and both may be reported when both are documented.

  Full comparison: D86.84 vs B20 →

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

• No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

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

Other codes that name D86.84 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 2 Excludes1 notes across 2 chapters: D72 — Other disorders of white blood cells (via D86.-), N16 — Renal tubulo-interstitial disorders in diseases classified elsewhere.

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 1 Code First instruction: J84.170 — Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere (via D86.-).

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

Referenced by 1 Code Also instruction: I27.29 — Other secondary pulmonary hypertension (via D86.-).

These codes suggest coding this condition alongside when both are present.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 3 MS-DRGs: DRG 196 (MDC 04), DRG 197 (MDC 04), DRG 198 (MDC 04).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):BLD008 — Immunity disorders (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 (Immunity disorders).

D84.822 — Immunodeficiency due to external causes, D84.89 — Other immunodeficiencies, D84.9 — Immunodeficiency, unspecified, D86.0 — Sarcoidosis of lung, D86.1 — Sarcoidosis of lymph nodes, D86.2 — Sarcoidosis of lung with sarcoidosis of lymph nodes, D86.3 — Sarcoidosis of skin, D86.81 — Sarcoid meningitis, D86.82 — Multiple cranial nerve palsies in sarcoidosis, D86.83 — Sarcoid iridocyclitis, D86.85 — Sarcoid myocarditis, D86.86 — Sarcoid arthropathy, D86.87 — Sarcoid myositis, D86.89 — Sarcoidosis of other sites, D86.9 — Sarcoidosis, unspecified, D89.0 — Polyclonal hypergammaglobulinemia, D89.1 — Cryoglobulinemia, D89.2 — Hypergammaglobulinemia, unspecified, D89.3 — Immune reconstitution syndrome, D89.40 — Mast cell activation, unspecified, +64 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main terms “Pyelonephritis”, “Sarcoid”; these codes share that main term but sit in a different category of the Tabular List.

A02.25 — Salmonella pyelonephritis (in, Salmonella infection), A23.9 — Brucellosis, unspecified (in, brucellosis), A36.84 — Diphtheritic tubulo-interstitial nephropathy (in, diphtheria), A41.9 — Sepsis, unspecified organism (in, sepsis), A52.75 — Syphilis of kidney and ureter (syphilitic), B58.83 — Toxoplasma tubulo-interstitial nephropathy (in, toxoplasmosis), C85.90 — Non-Hodgkin lymphoma, unspecified, unspecified site (in, lymphoma NEC), C90.0 — Multiple myeloma (in, multiple myeloma), C95.9 — Leukemia, unspecified (in, leukemia NEC), D89.1 — Cryoglobulinemia (in, cryoglobulinemia), E72.04 — Cystinosis (in, cystinosis), E74.09 — Other glycogen storage disease (in, glycogen storage disease), E83.01 — Wilson's disease (in, Wilson's disease), L08.89 — Other specified local infections of the skin and subcutaneous tissue (Spiegler-Fendt), M35.04 — Sjögren syndrome with tubulo-interstitial nephropathy (in, Sjögren's disease), N10 — Acute pyelonephritis (acute), N11.0 — Nonobstructive reflux-associated chronic pyelonephritis (nonobstructive, with reflux), N11.1 — Chronic obstructive pyelonephritis (in, obstruction), N11.8 — Other chronic tubulo-interstitial nephritis (chronic, specified NEC), N11.9 — Chronic tubulo-interstitial nephritis, unspecified (chronic), +3 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Gamma-glutamyl Transferase (GGT) Test, Partial Thromboplastin Time (PTT) Test, Prothrombin Time Test and INR (PT/INR)

Contextual Map

Every relationship of D86.84 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.

Run D86.84 with these 4 related codes in Claim Check

Hierarchy

• D50-D89 — Chapter 3: Diseases of the Blood and Blood-forming Organs and Certain Disorders Involving the Immune Mechanism (D50-D89) (D50-D89)[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Referenced by Excludes1 notes

• D72 — Other disorders of white blood cells[Excludes1](via D86.-): “immunity disorders (D80-D89)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• N16 — Renal tubulo-interstitial disorders in diseases classified elsewhere[Excludes1]: “pyelonephritis and tubulo-interstitial nephritis in sarcoidosis (D86.84)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Code First instructions

• J84.170 — Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere[Code First](via D86.-): “sarcoidosis (D86.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Code Also instructions

• I27.29 — Other secondary pulmonary hypertension[Code Also](via D86.-): “sarcoidosis (D86.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Clinical classification (CCSR)

• BLD008 — Immunity disorders[CCSR]— AHRQ CCSR for ICD-10-CM Diagnoses (HCUP)

MS-DRG Grouper

• DRG 196 — INTERSTITIAL LUNG DISEASE WITH MCC[MS-DRG]: “INTERSTITIAL LUNG DISEASE WITH MCC (MDC 04)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• DRG 197 — INTERSTITIAL LUNG DISEASE WITH CC[MS-DRG]: “INTERSTITIAL LUNG DISEASE WITH CC (MDC 04)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• DRG 198 — INTERSTITIAL LUNG DISEASE WITHOUT CC/MCC[MS-DRG]: “INTERSTITIAL LUNG DISEASE WITHOUT CC/MCC (MDC 04)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026

MDC crossing

• MDC 04 — Diseases and Disorders of the Respiratory System[MDC crossing]: “Diseases and Disorders of the Respiratory System — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 3,998 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries

• Disorder (of), tubulo-interstitial (in), sarcoidosis[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Pyelonephritis, in (due to), sarcoidosis[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Sarcoid, pyelonephritis[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Sarcoidosis, with, tubulo-interstitial nephropathy[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026

Nearest codes (14)

• D86 — Sarcoidosis[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• D86.0 — Sarcoidosis of lung[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• D86.1 — Sarcoidosis of lymph nodes[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• D86.2 — Sarcoidosis of lung with sarcoidosis of lymph nodes[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• D86.3 — Sarcoidosis of skin[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• D86.8 — Sarcoidosis of other sites[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• D86.81 — Sarcoid meningitis[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• D86.82 — Multiple cranial nerve palsies in sarcoidosis[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• and 6 more

Change history (3)

• FY2027 — Excludes2 note will be added[Change history]— CMS release files (code change ledger) · icd10cm-fy2027
• and 2 more

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

Coding guidelines Official source data

ICD-10-CM Official Guidelines for Coding and Reporting (FY2026), quoted by section 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

Inpatient payment groups Official source data

CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 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 D86.84 in its code family, with their registry titles.

• D86.3 — Sarcoidosis of skin
• D86.8 — Sarcoidosis of other sites
• D86.81 — Sarcoid meningitis
• D86.82 — Multiple cranial nerve palsies in sarcoidosis
• D86.83 — Sarcoid iridocyclitis
• D86.85 — Sarcoid myocarditis
• D86.86 — Sarcoid arthropathy
• D86.87 — Sarcoid myositis
• D86.89 — Sarcoidosis of other sites
• D86.9 — Sarcoidosis, unspecified

View all codes in the D86 family