NPPES file of Aug 9, 2026

Organizations City Of Ackley to City Of Bridgeport Department Of Health

300 organization NPIs in the federal registry, part 1,227 of 6,533 of the A to Z by practice name. Each row is the registry's record: the legal name, the NPI, the primary taxonomy, the location and the year the NPI was issued; the locations of one practice sit together. 4 link to a page of their own with the clinicians CMS lists billing through them.

CMS NPPES registry, monthly file · taxonomies as NUCC codes · method

OrganizationNPITaxonomyLocationNPI issued
City Of Ackley1871659763Land AmbulanceAckley, IA2-28
City Of Addison1467473165Land AmbulanceAddison, TX7-21
City Of Adrian1023178845Land AmbulanceAdrian, MN2-11
City Of Adrian1609198720Skilled Nursing FacilityAdrian, MN2-16
City Of Adrian1740621846Land AmbulanceAdrian, MI7-17
City Of Adrian - Adrian Manor Health And Rehab1124054366Skilled Nursing FacilityAdrian, MO6-22
City Of Akron1346650777AmbulanceAkron, IA5-07
City Of Akron Doing Business As Akron Health Dept. Counseling Division1992850473Public Health or Welfare AgencyAkron, OH1-24
City Of Akron Oh1609096973AmbulanceAkron, OH4-27
City Of Alabaster1699507475Land AmbulanceAlabaster, AL8-19
City Of Alameda1538269600AmbulanceAlameda, CA9-25
City Of Alameda Health Care District1225059355General Acute Care HospitalAlameda, CA7-22
City Of Alamo Heights1932100427Land AmbulanceSan Antonio, TX8-09
City Of Alamo Superintendent Of Schools1184288250Local Education Agency (LEA)Alamo, TN4-24
City Of Albany1518062264AmbulanceAlbany, OR9-14
City Of Albany Fire Department1306910013AmbulanceAlbany, CA1-17
City Of Albertville1174500078AmbulanceAlbertville, AL2-30
City Of Albuquerque1689033250AmbulanceAlbuquerque, NM2-11
City Of Alexandria1285132571Adult Day Care Clinic/CenterAlexandria, VA2-01
City Of Alexandria1447279658Mental Health Clinic/Center (Including Community Mental Health Center)Alexandria, VA7-19
City Of Alexandria1467832469Adolescent and Children Mental Health Clinic/CenterAlexandria, VA6-04
City Of Alexandria1902970593AmbulanceAlexandria, VA1-17
City Of Alexandria1982686424Land AmbulanceAlexandria, IN1-18
City Of Algoma1558372094Land AmbulanceAlgoma, WI8-10
City Of Algona1790715969Land AmbulanceAlgona, IA7-04
City Of Alhambra1790780112Land AmbulanceAlhambra, CA6-14
City Of Allen1003043951Land AmbulanceAllen, NE6-18
City Of Allen1043428949Land AmbulanceAllen, TX5-21
City Of Allen Park1821176926Land AmbulanceAllen Park, MI1-02
City Of Allentown1659535870State or Local Public Health Clinic/CenterAllentown, PA7-16
City Of Allentown, Bureau Of Health1184774606Registered NurseAllentown, PA1-10
City Of Alliance1245356377AmbulanceAlliance, NE3-21
City Of Alliance1609718972Transportation Network CompanyAlliance, NE4-07
City Of Alliance1629675863Land AmbulanceAlliance, OH0-01
City Of Alliance1740224823Public Health or Welfare AgencyAlliance, OH6-16
City Of Allison1881741742Land AmbulanceAllison, IA1-04
City Of Alpena1790862126Land AmbulanceAlpena, MI1-01
City Of Alton Fire Department Ems1134086192Emergency Medical Services (Emergency Medicine) PhysicianAlton, TX1-09
City Of Alton Ill1134577794AmbulanceAlton, IL5-24
City Of Altoona1548378664Land AmbulanceAltoona, IA8-28
City Of Altura1730282062AmbulanceAltura, MN9-05
City Of Altus1659141760AmbulanceAltus, OK1-09
City Of Alva1134122344Land AmbulanceAlva, OK5-23
City Of Alvin1538189451Land AmbulanceAlvin, TX7-21
City Of Amarillo1427303973Public Health or Welfare AgencyAmarillo, TX7-20
City Of Amesbury1174524276Land AmbulanceAmesbury, MA8-10
City Of Amesbury1659961563Public Health or Welfare AgencyAmesbury, MA1-25
City Of Amherst1184881658Land AmbulanceAmherst, TX5-21
City Of Amsterdam1376071969Land AmbulanceAmsterdam, NY5-26
City Of Anacortes1811320021Land AmbulanceAnacortes, WA8-12
City Of Anadarko1033119326AmbulanceAnadarko, OK7-28
City Of Anaheim1104786326Nurse PractitionerAnaheim, CA1-12
City Of Anaheim1720129430Land AmbulanceAnaheim, CA2-08
City Of Anderson1235137829Land AmbulanceAnderson, IN7-08
City Of Anderson1407928898Land AmbulanceAnderson, AK1-14
City Of Andrews1497860779Land AmbulanceAndrews, TX8-20
City Of Angeles Home Health INC1205570900Home Health AgencyLos Angeles, CA4-27
City Of Angels1194241869Assisted Living FacilityHouston, TX8-15
City Of Angels1215106422Private VehicleElberton, GA2-22
City Of Angels Best Care, INC1811028830Home Health AgencyLos Angeles, CA3-08
City Of Angels Community Mental Health Center1225498546Mental Health Clinic/Center (Including Community Mental Health Center)Los Angeles, CA2-29
City Of Angels Dermatology INC1568561256SpecialistTorrance, CA9-21
City Of Angels Dermatology INC1710385901Clinical Medical LaboratoryLong Beach, CA2-20
City Of Angels Dermatology INC1992103188Clinical Medical LaboratoryBeverly Hills, CA2-20
City Of Angels Emergency Medical Group, INC1457437154Emergency Medical Services (Emergency Medicine) PhysicianLos Angeles, CA0-27
City Of Angels Home Health, INC1215121074Home Health AgencyTorrance, CA9-04
City Of Angels Home Health, INC1649843210Home Health AgencyWoodland Hls, CA7-21
City Of Angels Home Health Care LLC1033493978Home Health AgencyMiami, FL0-10
City Of Angels Home Health Care LLC1104011519Home Health Registered NurseMiami, FL9-10
City Of Angels Home Healthcare INC1609757699Home Health AgencyBelmont, NC9-08
City Of Angels Home Healthcare INC1710858220In Home Supportive Care AgencyBelmont, NC9-16
City Of Angels Hospice Care1609287804Community Based Hospice Care AgencyLos Angeles, CA5-11
City Of Angels Radiology Medical Group1225099641Anatomic Pathology & Clinical Pathology PhysicianLos Angeles, CA3-28
City Of Anita1093999120Land AmbulanceAnita, IA2-26
City Of Anita Volunteer Fire Dept1548239569AmbulanceAnita, IA3-14
City Of Ankeny1225006968Land AmbulanceAnkeny, IA3-09
City Of Ann Arbor1487419792AmbulanceAnn Arbor, MI2-15
City Of Anna1265163414Land AmbulanceAnna, TX6-20
City Of Annapolis Finance Dept1386818110AmbulanceAnnapolis, MD4-14
City Of Anson1427595040Land AmbulanceAnson, TX1-20
City Of Anson1447610399AmbulanceAnson, TX3-03
City Of Anson1841469079Land AmbulanceAnson, TX2-21
City Of Ansonia1558359919AmbulanceAnsonia, CT0-11
City Of Antigo1407899677AmbulanceAntigo, WI6-14
City Of Antlers1740391192AmbulanceAntlers, OK8-31
City Of Apopka1083728588Land AmbulanceApopka, FL8-19
City Of Appleton1982776894Land AmbulanceAppleton, MN1-15
City Of Appleton Health Department1487857306Public Health or Welfare AgencyAppleton, WI6-07
City Of Arab (Ambulance Service)1578591137Land AmbulanceArab, AL6-30
City Of Arapahoe1730380924Land AmbulanceArapahoe, NE5-29
City Of Arcadia1144225483Land AmbulanceArcadia, CA6-14
City Of Archer City1780742379AmbulanceArcher City, TX2-05
City Of Argonia1417033473Land AmbulanceArgonia, KS0-31
City Of Arkansas City1043318520Land AmbulanceArkansas City, KS9-20
City Of Arlington1235101585Land AmbulanceArlington, WA2-02
City Of Arlington1669717237Land AmbulanceArlington, IA2-07
City Of Arlington1922111681AmbulanceArlington, MN8-16
City Of Artesia1710987680Land AmbulanceArtesia, NM7-21
City Of Asheville Health Services1437406519Health Service Clinic/CenterAsheville, NC8-08
City Of Ashland1578834222AmbulanceAshland, NE1-25
City Of Ashland1699803619AmbulanceAshland, OH3-01
City Of Ashland1942207402Land AmbulanceAshland, WI6-30
City Of Ashland1992891063Land AmbulanceAshland, OR0-05
City Of Ashtabula Ohio1154461374State or Local Public Health Clinic/CenterAshtabula, OH2-07
City Of Ashtabula Ohio1497991293Land AmbulanceAshtabula, OH2-29
City Of Atlanta1427081215Land AmbulanceAtlanta, TX7-08
City Of Attleboro1306942826Land AmbulanceAttleboro, MA9-15
City Of Attleboro Health Department1760516090Community Health Registered NurseAttleboro, MA3-16
City Of Atwater1033295910Land AmbulanceAtwater, MN0-31
City Of Aubrey1669177903AmbulanceAubrey, TX4-04
City Of Auburn1134330186Developmentally Disabled Services Day Training AgencyAuburn, ME5-24
City Of Auburn1558571125Case Management AgencyAuburn, ME5-23
City Of Auburn1568680049Local Education Agency (LEA)Auburn, ME4-23
City Of Auburn1588636237Land AmbulanceAuburn, WA2-06
City Of Auburn1932165453Land AmbulanceAuburn, ME4-24
City Of Auburn Hills1225451982Land AmbulanceAuburn Hills, MI1-30
City Of Audubon1679030480Land AmbulanceAudubon, IA2-28
City Of Augusta1164649349Local Education Agency (LEA)Augusta, ME4-19
City Of Augusta Treasurer1548397490Land AmbulanceAugusta, ME2-27
City Of Aurora1275565749Adult Day Care Clinic/CenterDenver, CO7-07
City Of Aurora1689232209Land AmbulanceAurora, NE5-29
City Of Aurora Illinois1114133246Land AmbulanceAurora, IL5-15
City Of Austin1053576181Public Health or Welfare AgencyAustin, TX7-29
City Of Austin1083245070Emergency Medical Services (Emergency Medicine) PhysicianAustin, TX1-29
City Of Austin1134242811Federally Qualified Health Center (FQHC)Austin, TX4-09
City Of Austin1295704732AmbulanceAustin, TX3-16
City Of Austin1457539686Federally Qualified Health Center (FQHC)Austin, TX2-11
City Of Austin1568635803Family Medicine PhysicianAustin, TX4-08
City Of Austin1578749305State or Local Public Health Clinic/CenterAustin, TX1-10
City Of Austin1629139738State or Local Public Health Clinic/CenterAustin, TX2-12
City Of Austin1841455730Public Health or Welfare AgencyAustin, TX7-21
City Of Austin1962667097Public Health or Welfare AgencyAustin, TX7-29
City Of Austin1982888749Family Medicine PhysicianAustin, TX2-28
City Of Avalon Director Of Finance1487659413Land AmbulanceAvalon, CA6-16
City Of Avon1699612416Land AmbulanceAvon, SD4-30
City Of Avon1871514034Land AmbulanceAvon, OH7-22
City Of Avon Lake1700103785AmbulanceAvon Lake, OH4-29
City Of Axtell1437267523AmbulanceAxtell, KS8-28
City Of Azle1790709814Land AmbulanceAzle, TX7-26
City Of Babbitt1205056744AmbulanceBabbitt, MN4-26
City Of Baker City1073643383AmbulanceBaker City, OR3-06
City Of Baker School Board1205268232Local Education Agency (LEA)Baker, LA8-01
City Of Baker School District1801248513Local Education Agency (LEA)Baker, LA7-06
City Of Balaton1881707032AmbulanceBalaton, MN8-15
City Of Bald Knob1689898330Land AmbulanceBald Knob, AR4-12
City Of Balmorhea1336210905Land AmbulanceBalmorhea, TX1-13
City Of Bancroft1720140734Land AmbulanceBancroft, IA2-15
City Of Bangor1326132218Public Health or Welfare AgencyBangor, ME0-03
City Of Bangor1346389087Land AmbulanceBangor, ME2-06
City Of Bangor1366654592Local Education Agency (LEA)Bangor, ME5-03
City Of Banning1760009237AmbulanceBanning, CA7-01
City Of Barberton1477667970AmbulanceBarberton, OH8-19
City Of Barnesville1932269750Land AmbulanceBarnesville, MN2-11
City Of Barre1457488660Land AmbulanceBarre, VT2-27
City Of Bartlett1588662266Land AmbulanceBartlett, TN7-07
City Of Batavia1720003353AmbulanceBatavia, NY7-13
City Of Batesville Indiana1033123674Land AmbulanceBatesville, IN7-28
City Of Bath1174588842Land AmbulanceBath, ME4-18
City Of Battle Creek1780775494Skilled Nursing FacilityBattle Creek, NE9-27
City Of Battle Creek1972711919Land AmbulanceBattle Creek, NE5-21
City Of Baxter1003791427Land AmbulanceBaxter, IA8-06
City Of Bay Village1801069992AmbulanceBay Village, OH4-09
City Of Bayard1073526398Land AmbulanceBayard, NE8-15
City Of Bayonne1225180144Ambulatory Family Planning FacilityBayonne, NJ1-18
City Of Baytown1043311434AmbulanceBaytown, TX9-26
City Of Beachwood Ohio1952354920Land AmbulanceBeachwood, OH5-18
City Of Bearden Arkansas1881820884Land AmbulanceBearden, AR6-04
City Of Beardstown1851412357Land AmbulanceBeardstown, IL4-02
City Of Beatrice1649203720AmbulanceBeatrice, NE7-09
City Of Beaufort1982120176Basic Emergency Medical TechnicianBeaufort, SC8-18
City Of Beaumont1982695268Land AmbulanceBeaumont, TX1-04
City Of Beaumont Public Health Department1255524070Public Health or Welfare AgencyBeaumont, TX8-24
City Of Beaver City1548215809Land AmbulanceBeaver City, NE5-24
City Of Beaver Dam Et Al1235186883Land AmbulanceBeaver Dam, WI5-28
City Of Bedford1588685747Land AmbulanceBedford, OH7-22
City Of Bedford1932156403Land AmbulanceBedford, TX5-28
City Of Bedford Heights1093768152Land AmbulanceBedford Heights, OH5-18
City Of Beech Grove1558443564AmbulanceBeech Grove, IN0-19
City Of Belfast1225165129Land AmbulanceBelfast, ME2-27
City Of Bella Vista Ambulance Service1003183526Land AmbulanceBella Vista, AR1-29
City Of Bellaire1982624805Land AmbulanceBellaire, TX7-21
City Of Bellbrook1558361709Land AmbulanceBellbrook, OH7-29
City Of Belle Plaine1316944325AmbulanceBelle Plaine, MN7-05
City Of Belle Plaine1750311742Land AmbulanceBelle Plaine, KS7-04
City Of Bellefontaine1932107687Land AmbulanceBellefontaine, OH7-07
City Of Belleville1700252558Personal Emergency Response AttendantBelleville, MI8-17
City Of Bellevue1154584639Land AmbulanceBellevue, NE7-06
City Of Bellevue1427328467Land AmbulanceBellevue, WA1-06
City Of Beloit1326161340ParamedicBeloit, WI4-06
City Of Belpre1154557049AmbulanceBelpre, OH6-05
City Of Belpre Ems, INC1699476168Land AmbulanceBelpre, OH3-13
City Of Belton1326020587Land AmbulanceBelton, TX1-15
City Of Belton1629295456Land AmbulanceBelton, MO4-20
City Of Belvidere1588355325Land AmbulanceBelvidere, IL5-15
City Of Benavides Ems1184738213Land AmbulanceBenavides, TX8-18
City Of Benbrook1215930672Land AmbulanceBenbrook, TX5-31
City Of Bend1760416358Land AmbulanceBend, OR7-10
City Of Benicia - Fire Department1316499122ParamedicBenicia, CA0-27
City Of Bennett1376039040Land AmbulanceBennett, IA7-06
City Of Benton1417472739Land AmbulanceBenton, IL8-08
City Of Bentonville1871611459AmbulanceBentonville, AR3-26
City Of Berea1760403836Land AmbulanceBerea, OH7-22
City Of Berkeley1215963699Mental Health Clinic/Center (Including Community Mental Health Center)Berkeley, CA6-25
City Of Berkeley1487972790Ambulatory Family Planning FacilityBerkeley, CA5-11
City Of Berkeley1497016588Case Management AgencyBerkeley, CA6-05
City Of Berkeley1689799520Adult Mental Health Clinic/CenterBerkeley, CA3-20
City Of Berkeley1710429642Mental Health Clinic/Center (Including Community Mental Health Center)Berkeley, CA1-09
City Of Berkeley1750415113Adolescent and Children Mental Health Clinic/CenterBerkeley, CA3-15
City Of Berkeley1851833784Mental Health Clinic/Center (Including Community Mental Health Center)Berkeley, CA1-09
City Of Berkeley1861078297Land AmbulanceBerkeley, MO3-24
City Of Berkeley1902944796Ambulatory Family Planning FacilityBerkeley, CA2-02
City Of Berkeley1952950461Mental Health Clinic/Center (Including Community Mental Health Center)Berkeley, CA9-06
City Of Berkeley Department Of Health, Housing & Community Services1679826713Community/Behavioral Health AgencyBerkeley, CA0-25
City Of Berkeley Fire Dept1750455200AmbulanceBerkeley, CA1-17
City Of Berkeley Public Health Clinic (Tb-Iz)1528107026State or Local Public Health Clinic/CenterBerkeley, CA2-05
City Of Berkeley Targeted Case Management1265612691Case Management AgencyBerkeley, CA1-14
City Of Berlin1104819606Home Health AgencyBerlin, NH8-30
City Of Berlin1336254291AmbulanceBerlin, WI8-20
City Of Berlin1376356543Land AmbulanceBerlin, NH1-30
City Of Bertha1053308494AmbulanceBertha, MN9-30
City Of Berwyn1245393073AmbulanceBerwyn, IL2-19
City Of Bessemer1598430134Land AmbulanceBessemer, AL8-16
City Of Bethel1619005683Land AmbulanceBethel, AK3-01
City Of Bethlehem1831363498Clinic/CenterBethlehem, PA4-15
City Of Bethlehem1891755070Land AmbulanceBethlehem, PA3-23
City Of Beverly1154590081Public Health or Welfare AgencyBeverly, MA2-25
City Of Beverly1295865780Local Education Agency (LEA)Beverly, MA3-06
City Of Beverly Hills1124719471Nurse PractitionerBeverly Hills, CA5-17
City Of Beverly Hills1962407155Land AmbulanceBeverly Hills, CA6-15
City Of Biddeford1225153224Land AmbulanceBiddeford, ME3-20
City Of Biddeford1518189091Developmentally Disabled Services Day Training AgencyBiddeford, ME5-03
City Of Biddeford1598978462Local Education Agency (LEA)Biddeford, ME5-08
City Of Biddeford1851504724Case Management AgencyBiddeford, ME5-08
City Of Big Bear Lake1790859163AmbulanceBig Bear, CA1-20
City Of Big Spring1265405757AmbulanceBig Spring, TX2-07
City Of Billings1306540786Land AmbulanceBillings, MT3-29
City Of Billings1922139153Non-emergency Medical Transport (VAN)Billings, MT3-08
City Of Binghamton1164404554AmbulanceBinghamton, NY1-19
City Of Birmingham1962487355Land AmbulanceBirmingham, AL2-08
City Of Birmingham Mich Finance Director1689995474Land AmbulanceBirmingham, MI6-16
City Of Bisbee1417961244Land AmbulanceBisbee, AZ7-28
City Of Bisbee Ambulance1386638930Land AmbulanceBisbee, AZ9-08
City Of Bishop1598478638Land AmbulanceBishop, CA1-04
City Of Bismarck1174599070State or Local Public Health Clinic/CenterBismarck, ND2-28
City Of Bismarck1386049153State or Local Public Health Clinic/CenterBismarck, ND0-23
City Of Biwabik1992723944AmbulanceBiwabik, MN7-18
City Of Bixby1306627526AmbulanceBixby, OK0-12
City Of Blackfoot1063839124Point of ServiceBlackfoot, ID3-26
City Of Blackfoot1831120708Land AmbulanceBlackfoot, ID7-06
City Of Blackwell1528061728Land AmbulanceBlackwell, OK5-23
City Of Blair1679717482Land AmbulanceBlair, NE4-23
City Of Blairstown1649213752Land AmbulanceBlairstown, IA6-14
City Of Bloomer1912196700AmbulanceBloomer, WI0-17
City Of Blooming Prairie1255470332Land AmbulanceBlooming Prairie, MN2-06
City Of Bloomington1568498079Land AmbulanceBloomington, IL6-25
City Of Bloomington1992869820Public Health or Welfare AgencyBloomington, MN2-22
City Of Blossoms Inpatient Services LLC1164777843Emergency Medicine PhysicianWillard, OH7-18
City Of Blue Ash1609863471AmbulanceBlue Ash, OH0-05
City Of Blue Island1730243569Land AmbulanceBlue Island, IL2-19
City Of Blue Springs1912035791AmbulanceBlue Springs, MO3-01
City Of Bluefield1306908827Non-emergency Medical Transport (VAN)Bluefield, WV2-14
City Of Boaz1346568003Land AmbulanceBoaz, AL5-05
City Of Boca Raton Office1679584007AmbulanceBoca Raton, FL8-10
City Of Bokchito1659424042Land AmbulanceBokchito, OK1-19
City Of Bondurant1023238615Emergency Care Clinic/CenterBondurant, IA4-26
City Of Bonham1679594584Land AmbulanceBonham, TX7-23
City Of Bonner Springs1942341565Land AmbulanceBonner Springs, KS2-08
City Of Booker Ambulance Service1881676294AmbulanceBooker, TX1-19
City Of Borger1477254506AmbulanceBorger, TX3-15
City Of Bossier City1548340144Land AmbulanceBossier City, LA0-17
City Of Boston1073638045Local Education Agency (LEA)Boston, MA3-20
City Of Bothell1184715476Land AmbulanceBothell, WA9-28
City Of Boulder1376696500Land AmbulanceBoulder, MT1-19
City Of Bovina1134197692AmbulanceBovina, TX3-10
City Of Bowie1508880253Land AmbulanceBowie, TX7-26
City Of Bowling Green1457345118Land AmbulanceBowling Green, OH9-08
City Of Boyden1356411318AmbulanceBoyden, IA1-08
City Of Boyne1316031552AmbulanceBoyne City, MI0-03
City Of Boynton Beach1699702134Land AmbulanceBoynton Beach, FL6-28
City Of Bozeman1922569227Land AmbulanceBozeman, MT3-28
City Of Bradford1780669960Land AmbulanceBradford, PA2-12
City Of Brady1639156029AmbulanceBrady, TX2-27
City Of Brainerd1578801700BusBrainerd, MN1-23
City Of Brawley1619506045Intermediate Emergency Medical TechnicianBrawley, CA4-07
City Of Brea1104688993Land AmbulanceBrea, CA1-26
City Of Brecksville1720317050AmbulanceBrecksville, OH2-16
City Of Brecksville1841528478Land AmbulanceCleveland, OH1-19
City Of Breese1265462592Land AmbulanceBreese, IL7-03
City Of Bremerton1750354536Land AmbulanceBremerton, WA2-10
City Of Brentwood1497736979Land AmbulanceBrentwood, MO1-10
City Of Brewer1003028192Local Education Agency (LEA)Brewer, ME5-03
City Of Brewer1316129554Land AmbulanceBrewer, ME1-29
City Of Bricelyn1619081320AmbulanceBricelyn, MN8-18
City Of Bridgeport1093784399AmbulanceBridgeport, NE3-17
City Of Bridgeport1275718322Land AmbulanceBridgeport, WA1-08
City Of Bridgeport1609880699Land AmbulanceBridgeport, WV7-28
City Of Bridgeport1730436783State or Local Public Health Clinic/CenterBridgeport, CT8-09
City Of Bridgeport Department Of Health1194840827Health Service Clinic/CenterBridgeport, CT3-20
City Of Bridgeport Department Of Health1477678191Health Service Clinic/CenterBridgeport, CT3-20
City Of Bridgeport Department Of Health1952426330Dental Clinic/CenterBridgeport, CT3-21

Source: CMS National Plan and Provider Enumeration System (NPPES) (download.cms.gov).