DRG 641
Medical DRGMiscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC
What is MS-DRG 641?
MS-DRG 641 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 10 (MDC 10) without a significant Complication or Comorbidity. It maps to 130 ICD-10-CM diagnosis codes. For FY 2026 it carries a relative weight of 0.7782 with a geometric mean length of stay of 2.6 days and an arithmetic mean of 3.3 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.
FY 2026 Payment Data
Official values from Table 5 of the FY 2026 IPPS Final Rule (CMS).
Related MS-DRGs in This Severity Group
The same clinical condition is split into separate DRGs by complication severity. MCC pays more than CC, which pays more than no CC/MCC.
| DRG | Title | Rel. Weight | GMLOS |
|---|---|---|---|
| 640 | Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC | 1.3356 | 3.6 days |
| 641 | Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCCThis page | 0.7782 | 2.6 days |
Linked ICD-10-CM Diagnosis Mappings
- D81.818
Other biotin-dependent carboxylase deficiency
BillableChapter 3 - D81.819
Biotin-dependent carboxylase deficiency, unspecified
BillableChapter 3 - E15
Nondiabetic hypoglycemic coma
BillableChapter 4 - E16.2
Hypoglycemia, unspecified
BillableChapter 4 - E20.1
Pseudohypoparathyroidism
BillableChapter 4 - E40
Kwashiorkor
BillableChapter 4 - E41
Nutritional marasmus
BillableChapter 4 - E42
Marasmic kwashiorkor
BillableChapter 4 - E43
Unspecified severe protein-calorie malnutrition
BillableChapter 4 - E44.0
Moderate protein-calorie malnutrition
BillableChapter 4 - E44.1
Mild protein-calorie malnutrition
BillableChapter 4 - E45
Retarded development following protein-calorie malnutrition
BillableChapter 4 - E46
Unspecified protein-calorie malnutrition
BillableChapter 4 - E50.8
Other manifestations of vitamin A deficiency
BillableChapter 4 - E50.9
Vitamin A deficiency, unspecified
BillableChapter 4 - E51.11
Dry beriberi
BillableChapter 4 - E51.12
Wet beriberi
BillableChapter 4 - E51.2
Wernicke's encephalopathy
BillableChapter 4 - E51.8
Other manifestations of thiamine deficiency
BillableChapter 4 - E51.9
Thiamine deficiency, unspecified
BillableChapter 4 - E52
Niacin deficiency [pellagra]
BillableChapter 4 - E53.0
Riboflavin deficiency
BillableChapter 4 - E53.1
Pyridoxine deficiency
BillableChapter 4 - E53.8
Deficiency of other specified B group vitamins
BillableChapter 4 - E53.9
Vitamin B deficiency, unspecified
BillableChapter 4 - E54
Ascorbic acid deficiency
BillableChapter 4 - E55.9
Vitamin D deficiency, unspecified
BillableChapter 4 - E56.0
Deficiency of vitamin E
BillableChapter 4 - E56.1
Deficiency of vitamin K
BillableChapter 4 - E56.8
Deficiency of other vitamins
BillableChapter 4 - E56.9
Vitamin deficiency, unspecified
BillableChapter 4 - E58
Dietary calcium deficiency
BillableChapter 4 - E59
Dietary selenium deficiency
BillableChapter 4 - E60
Dietary zinc deficiency
BillableChapter 4 - E61.0
Copper deficiency
BillableChapter 4 - E61.1
Iron deficiency
BillableChapter 4 - E61.2
Magnesium deficiency
BillableChapter 4 - E61.3
Manganese deficiency
BillableChapter 4 - E61.4
Chromium deficiency
BillableChapter 4 - E61.5
Molybdenum deficiency
BillableChapter 4 - E61.6
Vanadium deficiency
BillableChapter 4 - E61.7
Deficiency of multiple nutrient elements
BillableChapter 4 - E61.8
Deficiency of other specified nutrient elements
BillableChapter 4 - E61.9
Deficiency of nutrient element, unspecified
BillableChapter 4 - E63.0
Essential fatty acid [EFA] deficiency
BillableChapter 4 - E63.1
Imbalance of constituents of food intake
BillableChapter 4 - E63.8
Other specified nutritional deficiencies
BillableChapter 4 - E63.9
Nutritional deficiency, unspecified
BillableChapter 4 - E64.0
Sequelae of protein-calorie malnutrition
BillableChapter 4 - E64.1
Sequelae of vitamin A deficiency
BillableChapter 4 - E64.2
Sequelae of vitamin C deficiency
BillableChapter 4 - E64.8
Sequelae of other nutritional deficiencies
BillableChapter 4 - E64.9
Sequelae of unspecified nutritional deficiency
BillableChapter 4 - E65
Localized adiposity
BillableChapter 4 - E66.01
Morbid (severe) obesity due to excess calories
BillableChapter 4 - E66.09
Other obesity due to excess calories
BillableChapter 4 - E66.1
Drug-induced obesity
BillableChapter 4 - E66.3
Overweight
BillableChapter 4 - E66.811
Obesity, class 1
BillableChapter 4 - E66.812
Obesity, class 2
BillableChapter 4 - E66.813
Obesity, class 3
BillableChapter 4 - E66.89
Other obesity not elsewhere classified
BillableChapter 4 - E66.9
Obesity, unspecified
BillableChapter 4 - E67.0
Hypervitaminosis A
BillableChapter 4 - E67.1
Hypercarotenemia
BillableChapter 4 - E67.2
Megavitamin-B6 syndrome
BillableChapter 4 - E67.3
Hypervitaminosis D
BillableChapter 4 - E67.8
Other specified hyperalimentation
BillableChapter 4 - E68
Sequelae of hyperalimentation
BillableChapter 4 - E83.40
Disorders of magnesium metabolism, unspecified
BillableChapter 4 - E83.41
Hypermagnesemia
BillableChapter 4 - E83.42
Hypomagnesemia
BillableChapter 4 - E83.49
Other disorders of magnesium metabolism
BillableChapter 4 - E83.50
Unspecified disorder of calcium metabolism
BillableChapter 4 - E83.51
Hypocalcemia
BillableChapter 4 - E83.52
Hypercalcemia
BillableChapter 4 - E83.59
Other disorders of calcium metabolism
BillableChapter 4 - E83.81
Hungry bone syndrome
BillableChapter 4 - E84.8
Cystic fibrosis with other manifestations
BillableChapter 4 - E84.9
Cystic fibrosis, unspecified
BillableChapter 4 - E86.0
Dehydration
BillableChapter 4 - E86.1
Hypovolemia
BillableChapter 4 - E86.9
Volume depletion, unspecified
BillableChapter 4 - E87.0
Hyperosmolality and hypernatremia
BillableChapter 4 - E87.1
Hypo-osmolality and hyponatremia
BillableChapter 4 - E87.20
Acidosis, unspecified
BillableChapter 4 - E87.21
Acute metabolic acidosis
BillableChapter 4 - E87.22
Chronic metabolic acidosis
BillableChapter 4 - E87.29
Other acidosis
BillableChapter 4 - E87.3
Alkalosis
BillableChapter 4 - E87.4
Mixed disorder of acid-base balance
BillableChapter 4 - E87.5
Hyperkalemia
BillableChapter 4 - E87.6
Hypokalemia
BillableChapter 4 - E87.70
Fluid overload, unspecified
BillableChapter 4 - E87.71
Transfusion associated circulatory overload
BillableChapter 4 - E87.79
Other fluid overload
BillableChapter 4 - E87.8
Other disorders of electrolyte and fluid balance, not elsewhere classified
BillableChapter 4 - E89.0
Postprocedural hypothyroidism
BillableChapter 4 - P92.6
Failure to thrive in newborn
BillableChapter 16 - R29.0
Tetany
BillableChapter 18 - R62.0
Delayed milestone in childhood
BillableChapter 18 - R62.50
Unspecified lack of expected normal physiological development in childhood
BillableChapter 18 - R62.51
Failure to thrive (child)
BillableChapter 18 - R62.52
Short stature (child)
BillableChapter 18 - R62.59
Other lack of expected normal physiological development in childhood
BillableChapter 18 - R62.7
Adult failure to thrive
BillableChapter 18 - R63.0
Anorexia
BillableChapter 18 - R63.1
Polydipsia
BillableChapter 18 - R63.2
Polyphagia
BillableChapter 18 - R63.30
Feeding difficulties, unspecified
BillableChapter 18 - R63.31
Pediatric feeding disorder, acute
BillableChapter 18 - R63.32
Pediatric feeding disorder, chronic
BillableChapter 18 - R63.39
Other feeding difficulties
BillableChapter 18 - R63.4
Abnormal weight loss
BillableChapter 18 - R63.5
Abnormal weight gain
BillableChapter 18 - R63.6
Underweight
BillableChapter 18 - R63.8
Other symptoms and signs concerning food and fluid intake
BillableChapter 18 - R73.01
Impaired fasting glucose
BillableChapter 18 - R73.02
Impaired glucose tolerance (oral)
BillableChapter 18 - R73.03
Prediabetes
BillableChapter 18 - R73.09
Other abnormal glucose
BillableChapter 18 - R73.9
Hyperglycemia, unspecified
BillableChapter 18 - R82.4
Acetonuria
BillableChapter 18 - Z68.41
Body mass index [BMI] 40.0-44.9, adult
BillableChapter 21 - Z68.42
Body mass index [BMI] 45.0-49.9, adult
BillableChapter 21 - Z68.43
Body mass index [BMI] 50.0-59.9, adult
BillableChapter 21 - Z68.44
Body mass index [BMI] 60.0-69.9, adult
BillableChapter 21 - Z68.45
Body mass index [BMI] 70 or greater, adult
BillableChapter 21 - Z68.55
Body mass index [BMI] pediatric, 120% of the 95th percentile for age to less than 140% of the 95th percentile for age
BillableChapter 21 - Z68.56
Body mass index [BMI] pediatric, greater than or equal to 140% of the 95th percentile for age
BillableChapter 21