MSSA Detail 2010c1 public
type: Dataset
description: Medical Service Study Areas - Census Detail, 2010 California Health & Human Services Agency Open Data Portal Description Medical Service Study Areas (MSSAs) are sub-city and sub-county geographical units used to organize and display population, demographic and physician data. MSSAs were developed in 1976 by the California Healthcare Workforce Policy Commission (formerly California Health Manpower Policy Commission) to respond to legislative mandates requiring it to determine "areas of unmet priority need for primary care family physicians" (Song-Brown Act of 1973) and "geographical rural areas where unmet priority need for medical services exist" (Garamendi Rural Health Services Act of 1976). MSSAs are recognized by the U.S. Health Resources and Services Administration, Bureau of Health Professions' Office of Shortage Designation as rational service areas for purposes of designating Health Professional Shortage Areas (HPSAs), and Medically Underserved Areas and Medically Underserved Populations (MUAs/MUPs). The MSSAs incorporate the U.S. Census total population, socioeconomic and demographic data and are updated with each decadal census. Office of Statewide Health Planning and Development provides updated data for each County's MSSAs to the County and Communities, and will schedule meetings for areas of significant population change. Community meetings will be scheduled throughout the State as needed. Adopted by the California Healthcare Workforce Policy Commission on May 15, 2002. Each MSSA is composed of one or more complete census tracts. MSSAs will not cross county lines. All population centers within the MSSA are within 30 minutes travel time to the largest population center. Urban MSSA - Population range 75,000 to 125,000. Reflect recognized community and neighborhood boundaries. Similar demographic and socio-economic characteristics. Rural MSSA - Population density of less than 250 persons per square mile. No population center exceeds 50,000. Frontier MSSA - …
issued: 2015-12-03T18:41:57+00:00
modified: 2015-12-15T20:17:29.487000+00:00
contact point: Organization
  fn: CHHS
keyword: amerigeo
keyword: amerigeoss
keyword: california-department-of-public-health
keyword: caopendata
keyword: ckan
keyword: geo
keyword: geoss
keyword: healthcare
keyword: mssa2010
keyword: national
keyword: north-america
keyword: oshpd
keyword: united-states
theme: {"Health and Human Services"}

Shapefile
type: Distribution
format: ZIP
issued: 2022-06-23T00:50:25.949172
modified: 2025-11-21T07:36:17.341326
access URL: https://cdph-chhsagency.opendata.arcgis.com/datasets/CDPHDATA::mssa-detail-2010c1-public.zip
media type: application/zip

KML
type: Distribution
format: KML
issued: 2022-06-23T00:50:25.949169
modified: 2025-11-21T07:36:17.340953
access URL: https://cdph-chhsagency.opendata.arcgis.com/datasets/CDPHDATA::mssa-detail-2010c1-public.kml
media type: application/vnd.google-earth.kml+xml

All resource data
type: Distribution
description: mssa-detail-2010c1-public-z7dqi1.zip
format: ZIP
issued: 2022-07-28T02:05:28.357039
modified: 2025-11-21T07:36:17.341718
access URL: https://data.chhs.ca.gov/dataset/547e0073-bdf6-4817-87cb-81c0d00a7374/resource/58245074-cfaa-41cd-81e2-70826bfb57a8/download/mssa-detail-2010c1-public-z7dqi1.zip
media type: application/zip

ArcGIS GeoService
type: Distribution
format: ArcGIS GeoServices REST API
issued: 2022-06-23T00:50:25.949161
modified: 2025-11-21T07:36:17.339813
access URL: https://services2.arcgis.com/wi1yEacfYjH5viqb/arcgis/rest/services/MSSA2010/FeatureServer/1
media type: application/octet-stream

CSV
type: Distribution
format: CSV
issued: 2022-06-23T00:50:25.949167
modified: 2025-11-21T07:36:17.340582
access URL: https://cdph-chhsagency.opendata.arcgis.com/datasets/CDPHDATA::mssa-detail-2010c1-public.csv
media type: text/csv

GeoJSON
type: Distribution
format: GeoJSON
issued: 2022-06-23T00:50:25.949164
modified: 2025-11-21T07:36:17.340206
access URL: https://cdph-chhsagency.opendata.arcgis.com/datasets/CDPHDATA::mssa-detail-2010c1-public.geojson
media type: application/geo+json

ArcGIS Hub Dataset
type: Distribution
format: HTML
issued: 2022-06-23T00:50:25.949154
modified: 2025-11-21T07:36:17.339411
access URL: https://cdph-chhsagency.opendata.arcgis.com/maps/CDPHDATA::mssa-detail-2010c1-public

US Migrating
type: Agent