Journalism in the Public Interest


Prescriber Checkup



The combination of glyburide and metformin is used to treat type 2 diabetes (condition in which the body does not use insulin normally and therefore cannot control the amount of sugar in the blood) in people whose diabetes cannot be controlled by diet and exercise alone. Glyburide belongs to a class of drugs called sulfonylureas, and metformin is in a class of drugs called biguanides. Glyburide lowers blood sugar by causing the pancreas to produce insulin (a natural substance that is needed to break down sugar in the body) and helping the body use insulin efficiently. This medication will only help lower blood sugar in people whose bodies produce insulin naturally. Metformin helps your body control the amount of glucose (sugar) in your blood. It decreases the amount of glucose you absorb from your food and the amount of glucose made by your liver. It also helps your body use its own insulin more effectively. Glyburide and metformin are not used to treat type 1 diabetes (condition in which the body does not produce insulin and therefore cannot control the amount of sugar in the blood) or diabetic ketoacidosis (a serious condition that may occur if high blood sugar is not treated). More info »

Totals only include the 50 U.S. States and Washington D.C.

Medicare Part D Claims
Retail Cost

Cost by state

State Claims Cost
Texas 162,788 $4.99M
California 149,774 $3.42M
Florida 149,386 $3.6M
New York 132,214 $3.41M
Pennsylvania 52,527 $1.84M
Georgia 42,586 $1.11M
New Jersey 39,926 $1.16M
North Carolina 38,844 $1.04M
Mississippi 37,646 $769K
Illinois 36,318 $1.1M
Ohio 35,995 $1.36M
Alabama 32,435 $728K
South Carolina 30,317 $785K
Louisiana 26,966 $605K
Michigan 26,936 $847K
Arkansas 24,514 $550K
Tennessee 23,422 $646K
Kentucky 23,035 $660K
Indiana 23,011 $729K
Missouri 22,348 $621K
Virginia 19,920 $611K
Wisconsin 16,280 $566K
Oklahoma 13,846 $397K
Maryland 13,142 $446K
Iowa 13,006 $334K
West Virginia 11,773 $355K
Connecticut 9,331 $305K
Massachusetts 8,591 $300K
Arizona 8,569 $315K
Colorado 7,332 $223K
Minnesota 7,208 $201K
Kansas 7,189 $204K
Rhode Island 6,948 $196K
Nevada 6,769 $170K
Hawaii 5,837 $158K
Nebraska 5,425 $131K
Washington 5,272 $169K
Utah 4,504 $151K
Oregon 3,434 $107K
New Mexico 3,076 $88.9K
South Dakota 2,518 $61K
New Hampshire 1,859 $70.5K
Idaho 1,818 $58.7K
Delaware 1,710 $67.5K
Maine 1,453 $67.7K
North Dakota 1,231 $31.3K
Montana 1,207 $31.8K
District of Columbia 1,205 $27.4K
Vermont 886 $35.8K
Wyoming 816 $23.4K
Alaska 304 $9,823
About This Data

ProPublica obtained prescribing data from Medicare’s prescription drug benefit, known as Part D, under the Freedom of Information Act. The data for 2012 includes more than 1.2 billion prescriptions written by nearly 1.5 million doctors, nurses and other providers. This database lists about 382,000 of those providers who wrote 50 or more prescriptions for at least one drug that year. Almost three-fourths went to patients 65 and older; the rest were for disabled patients. Methodology »

Incorrect Info?

If you are a provider and you believe your address is incorrect, check the listing you created on the National Provider Identifier registry. If you change your listing, send a note to and we will update your information. If you have other questions about this data, send a note to


Provider Medicare Claims City State