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 »


Medicare Part D Claims
Retail Cost

Cost by state

State Claims Cost
Texas 178,210 $5.95M
Florida 167,379 $4.2M
California 160,300 $4.56M
New York 135,810 $4.1M
Puerto Rico 82,096 $1.14M
Pennsylvania 57,864 $2.35M
Georgia 47,564 $1.3M
North Carolina 44,508 $1.26M
New Jersey 40,999 $1.22M
Mississippi 40,956 $923K
Illinois 40,013 $1.26M
Ohio 39,465 $1.52M
Alabama 35,165 $837K
South Carolina 34,454 $956K
Louisiana 28,502 $690K
Arkansas 27,371 $681K
Indiana 26,252 $879K
Michigan 25,971 $902K
Kentucky 25,883 $772K
Tennessee 25,609 $732K
Missouri 24,705 $714K
Virginia 22,209 $719K
Wisconsin 18,662 $642K
Oklahoma 15,757 $525K
Iowa 14,800 $365K
Maryland 14,678 $589K
West Virginia 13,463 $429K
Connecticut 10,029 $329K
Arizona 9,808 $364K
Massachusetts 9,320 $336K
Colorado 8,256 $276K
Minnesota 8,212 $239K
Kansas 8,139 $243K
Rhode Island 7,692 $214K
Nevada 7,223 $212K
Hawaii 6,473 $215K
Washington 6,387 $218K
Nebraska 5,937 $153K
Utah 5,028 $191K
Oregon 3,964 $131K
New Mexico 3,430 $113K
South Dakota 2,870 $73.3K
New Hampshire 2,119 $77.1K
Delaware 1,978 $91.5K
Idaho 1,954 $69K
Maine 1,771 $81.6K
Montana 1,542 $43.6K
North Dakota 1,523 $42.4K
District of Columbia 1,217 $31.8K
Vermont 1,124 $43.1K
Wyoming 1,000 $28.9K
Alaska 366 $12.4K
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 2011 includes nearly 1.2 billion prescriptions written by 1.6 million doctors, nurses and other providers. This database lists about 364,000 of those providers who wrote 50 or more prescriptions for at least one drug that year. About 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