MS-DRG · FY 2026 v43.0

MS-DRG 305 – Hypertension without MCC

A Medical DRG in MDC 05 (Diseases & Disorders of the Circulatory System). Inpatient cases group to DRG 305 when the ICD-10-CM principal diagnosis is one of the 11 codes listed below and no secondary diagnosis on the MCC list is present. Its FY 2026 relative weight is 0.7551 with a geometric mean length of stay of 2.1 days.

Medical DRG – assigned by principal diagnosis✓ Official CMS v43.0 dataset
0.7551
Relative Weight
2.1
Geometric Mean LOS (days)
2.6
Arithmetic Mean LOS (days)
11
Principal Diagnosis Codes

Severity family

DRG 304with MCCWeight 1.1900 · GMLOS 3.1 daysDRG 305without MCCWeight 0.7551 · GMLOS 2.1 days
How a case is assigned to DRG 305

The grouper first assigns the case to MDC 05 from the principal diagnosis and finds no qualifying operating-room procedure (this is a Medical DRG; ICD-10-PCS codes do not drive assignment here), then applies the severity split from secondary diagnoses: with MCC → 304; without MCC → 305.

ICD-10-CM

Principal Diagnosis Codes 11 codes · 5 categories

I11 Hypertensive heart disease1 code
  • I11.9 Hypertensive heart disease without heart failure
I15 Secondary hypertension5 codes
  • I15.0 Renovascular hypertension
  • I15.1 Hypertension secondary to other renal disorders
  • I15.2 Hypertension secondary to endocrine disorders
  • I15.8 Other secondary hypertension
  • I15.9 Secondary hypertension, unspecified
I16 Hypertensive crisis3 codes
  • I16.0 Hypertensive urgency
  • I16.1 Hypertensive emergency
  • I16.9 Hypertensive crisis, unspecified
I1A Other hypertension1 code
  • I1A.0 Resistant hypertension
N26 Unspecified contracted kidney1 code
ICD-10-PCS

Procedure Codes

Procedure codes do not drive assignment for this DRG. DRG 305 is a Medical DRG, assigned from the principal diagnosis above.

Frequently Asked Questions

What is MS-DRG 305?

MS-DRG 305 (Hypertension without MCC) is a medical DRG in MDC 05 (Diseases & Disorders of the Circulatory System). Its FY 2026 relative weight is 0.7551 with a geometric mean length of stay of 2.1 days.

What is the difference between DRG 304, 305?

All 2 share the same base category; the severity of secondary diagnoses separates them: 304 (with MCC), 305 (without MCC). A major complication or comorbidity (MCC) places the case in the highest-weighted DRG of the family; a CC in the middle; neither in the lowest.

How many diagnosis codes group to DRG 305?

11 ICD-10-CM principal diagnosis codes group to this DRG, spanning 5 three-character categories.

What is the relative weight of DRG 305?

The FY 2026 relative weight of this DRG is 0.7551, meaning reimbursement of roughly 0.76 times the average Medicare inpatient case. Multiply by a hospital's blended base rate for the approximate payment.

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Source: CMS ICD-10 MS-DRG v43.0 Definitions Manual and the FY 2026 IPPS Final Rule (Table 5), effective October 1, 2025 through September 30, 2026. We publish the DRG assignments as CMS defines them and add the navigation, search, and code links.