Basic Information
Provider Information
NPI: 1841558103
EntityType: 1
ReplacementNPI:  
OrganizationName:  
LastName: FONG
FirstName: YI-JEN
MiddleName:  
NamePrefix:  
NameSuffix:  
Credential: MD
OtherOrganizationName:  
OtherOrganizationType:  
OtherLastName:  
OtherFirstName:  
OtherMiddleName:  
OtherNamePrefix:  
OtherNameSuffix:  
OtherCredential:  
OtherLastNameType:  
Mailing Information
Address1: 775 FERN RDG
Address2:  
City: FELTON
State: CA
PostalCode: 950189028
CountryCode: US
TelephoneNumber: 3103398534
FaxNumber:  
Practice Location
Address1: 4370 ALPINE RD
Address2: SUITE #206
City: PORTOLA VALLEY
State: CA
PostalCode: 94028
CountryCode: US
TelephoneNumber: 6503766010
FaxNumber:  
Other Information
ProviderEnumerationDate: 04/24/2012
LastUpdateDate: 09/27/2022
NPIDeactivationReasonCode:  
NPIDeactivationDate:  
NPIReactivationDate:  
ProviderGenderCode: M
AuthorizedOfficialLastName:  
AuthorizedOfficialFirstName:  
AuthorizedOfficialMiddleName:  
AuthorizedOfficialTitleorPosition:  
AuthorizedOfficialTelephone:  
IsSoleProprietor: Y
IsOrganizationSubpart:  
ParentOrganizationLBN:  
AuthorizedOfficialNamePrefix:  
AuthorizedOfficialNameSuffix:  
AuthorizedOfficialCredential:  
NPICertificationDate: 09/21/2022

Taxonomy Information
TaxonomyLicenseStateSwitchTaxonomyGroupTaxonomyTypeTaxonomyClassSubSpecialty
207R00000XA124113CAY Allopathic & Osteopathic PhysiciansInternal Medicine 

No ID Information.


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