Advanced Internal Medicine Associates, INC in Madera, CA

This location of Advanced Internal Medicine Associates bills under NPI 1598187486, an organization record issued on Jan 10, 2014 with the primary taxonomy Internal Medicine Physician. It is one of 2 NPIs registered under this name; each clinician who sees you there has their own NPI and license.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

Organization recordNPPES, Aug 2026

1598187486

Legal name: Advanced Internal Medicine Associates, INC
Entity: Type 2 · organization
Primary taxonomy: Internal Medicine Physician 207R00000X
Practice location: 1111 W 4TH ST BLD B, Madera, CA 93637
Phone: 559-662-2700
Enumerated: Jan 10, 2014
Record updated: Jan 10, 2014
Authorized official: President (title as filed)

Public record from the NPPES NPI Registry (open it on CMS). An NPI identifies who bills; it is not a facility license.

2 clinicians CMS lists with Advanced Internal Medicine Associates in Madera

Steven Gustaveson, MDInternal Medicine Physician1598777559
Allan Nassar, MDInternal Medicine Physician1033129135

Source: CMS Doctors and Clinicians group affiliations, matched by practice name and city.

All 2 Advanced Internal Medicine Associates NPIs

Every location registered under this name, in 2 cities.

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Checking an organization

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Common questions

Is an organization NPI a license?

No. An NPI identifies who bills. Facilities and the clinicians who work there are licensed separately by the state.

Source: CMS National Plan and Provider Enumeration System (NPPES), monthly file of Aug 9, 2026 (NPPES files on CMS.gov). An NPI identifies who bills; it is not a license.