DR. ROBERT G WILLIAMSON M.D. NPI 1316950298

NPI Information

  • NPI: 1316950298
  • Provider Name: DR. ROBERT G WILLIAMSON, M.D.
  • Classification: Psychiatry & Neurology - 2084P0800X
  • Specialization: Psychiatry
  • Entity Type: Individual
  • PECOS Registration: Yes
  • Address: 903 N 2ND ST
    PHOENIX, AZ
    ZIP 85004
  • Phone: (602) 416-7600

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NPI Details

DR. Robert G Williamson, M.D. is a psychiatry psychiatry neurology in Phoenix, AZ. The provider is a Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems. DR. Robert G Williamson, M.D. NPI is 1316950298. The provider is registered as an individual entity type.

The NPPES NPI record indicates the provider is a male.

The provider's business location address is:

903 N 2ND ST
PHOENIX, AZ
ZIP 85004-906
Phone: (602) 416-7600
Fax: (602) 416-7703

The NPI 1316950298 is registered in the Medicare Provider, Enrollment, Chain and Ownership System (PECOS). The provider is legally eligible to order and refer Part B (Clinical Laboratory and Imaging), Durable Medical Equipment, Part A Home Health Agency (HHA), Power Mobility Devices.

The enumeration date for this NPI number is 8/14/2006 and was last updated on 6/8/2011.

Taxonomy Codes

The NPI record includes the healthcare provider taxonomy classification, state license number and state of licensure. The following information regarding the scope of practice of this provider is available:

No. Taxonomy Code Taxonomy Clasification Taxonomy Specialization License Number License State Primary
12084P0800XPsychiatry & NeurologyPsychiatryK5430TEXASNo
22084P0800XPsychiatry & NeurologyPsychiatry37934ARIZONAYes

Other Identifiers

The following information regarding additional identifiers associated to this NPI record includes the other identifier number, identifier type, identifier state and issuer.

No. Other Provider Identifier Other Provider Identifier Type Other Provider Identifier State Other Provider Identifier Issuer
1323283MEDICAIDARIZONA
2Z132215MEDICARE PINARIZONA
300742QMEDICARE ID-TYPE UNSPECIFIEDTEXAS
4H15996MEDICARE UPINTEXAS
5Z139486MEDICARE PINARIZONA
6Z145274MEDICARE PINARIZONA
71663163-01MEDICAIDTEXAS

What is NPI?

NPI stands for National Provider Identifier. The NPI is a 10-digit identification number that is completely unique. The NPI number by itself does not contain any identifiable information such as a provider’s speciality or location. The NPI is assigned to individuals or organizacions for their lifespan and it is independent of key provider information type updates like a change of practices, location or speciality.

This page was last updated on: 11/21/2025

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