We mapped the volume of TJAs performed in New York State in a heat map by patient and hospital 3-digit ZIP Code.
The left map shows the statewide distribution of patient residence, while the right shows the distribution of the operating volume by hospital location--both determined by 3-digit ZIP Code. The left map shows a wide and somewhat even distribution of TJA recipients throughout the state, while the right map shows the concentration of these procedures on a select few urban centers.
The geographically proximate firms are those located in the same 3-digit zip code
as firm i.
Private insurance fees for the 84 selected physician services were obtained from the PHCS 1990 national data base that, as noted, reports fees for 3-digit ZIP Code
Nationally, there are 770 3-digit ZIP Code
areas, compared with more than 3,000 counties.
Some of the most popular territories that companies use are:US States, zip codes by State, counties by State, PUMA territories, and 3-digit zip codes
. Outside USA, users can also use territories of UK, Canada, Australia, Mexico, and many others.
Population by 3-digit zip codes
(zip sectional centers) was selected as the elemental customer cluster.