159 MS-DRG: DENTAL AND ORAL DISEASES WITHOUT CC/MCC
MS-DRG 159 groups Medicare inpatient hospital stays for: DENTAL AND ORAL DISEASES WITHOUT CC/MCC. This is a medical MS-DRG. It falls under MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat).
Payment & Classification Data
Official CMS values from the FY2027 IPPS Final Rule Table 5.
| Major Diagnostic Category | MDC 03 — Diseases and Disorders of the Ear, Nose, Mouth and Throat |
| DRG Type | Medical |
| Severity Level | None |
| Relative Weight | 0.6893 |
| Relative Weight (10% Cap Applied) | 0.6893 |
| Geometric Mean Length of Stay | 2 days |
| Arithmetic Mean Length of Stay | 2.5 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
415 diagnosis codes can drive assignment here: A69.0, B00.2, B37.0, B37.83, D10.0, D10.1, D10.2, D10.30, D10.39, D16.5, K00.0, K00.1 and 403 more.
From the CMS MS-DRG Definitions Manual (Appendices B and E). Assignment also depends on severity, discharge status and the rest of the claim.
Contextual Map
Every relationship of 159 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.
Major Diagnostic Category
- MDC 03 — Diseases and Disorders of the Ear, Nose, Mouth and Throat[MDC]— CMS MS-DRG Definitions Manual · FY2027
Defining diagnoses (415)
- A69.0 — Necrotizing ulcerative stomatitis[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- B00.2 — Herpesviral gingivostomatitis and pharyngotonsillitis[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- B37.0 — Candidal stomatitis[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- B37.83 — Candidal cheilitis[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- D10.0 — Benign neoplasm of lip[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- D10.1 — Benign neoplasm of tongue[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- D10.2 — Benign neoplasm of floor of mouth[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- D10.30 — Benign neoplasm of unspecified part of mouth[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 407 more
DRG family
- DRG 157 — DENTAL AND ORAL DISEASES WITH MCC[DRG family]: “DENTAL AND ORAL DISEASES WITH MCC — same CMS DRG family (157-159), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 157-159) · FY2027
- DRG 158 — DENTAL AND ORAL DISEASES WITH CC[DRG family]: “DENTAL AND ORAL DISEASES WITH CC — same CMS DRG family (157-159), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 157-159) · FY2027
Read from: CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44. All data sources · How to read the labels · How MedCoder verifies its implementation
Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 20, 2026 · All releases and sources