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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert J Hamburg, MD

Interventional Cardiology Physician in Chandler, AZ · enumerated 2006 · practices at Central Arizona Heart Specialists Plc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1053387563

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Registry record

Entity type Individual (Type 1)
Name Dr. Robert J Hamburg
Credential MD
Sex Male
Practice address 333 North Dobson Road, Suite 11, Chandler, AZ, 85224
Phone (480) 899-2020
Fax (480) 899-9081
Enumeration date Feb 24, 2006
Last updated in NPPES Jan 23, 2014

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 21505 (AZ) Secondary
207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License 21505 (AZ) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
141622 Other AZ STATE AHCCCS NUMBER
141622001 Other AZ AHCCCS MERCYCARE NUMBER
531914 Other AZ AHCCCS MEDICARE CROSSOVER
AZ0863170 Other AZ BC/BS OF ARIZONA
060067938 Other AZ RAILROAD MEDICARE NUMBER
20451 Other AZ UNITED HEALTHCARE
337562 Other AZ ONE HEALTH PLAN
95964 Other AZ PACIFICARE
2Z0239 Other AZ HEALTHNET OF ARIZONA
3297847021 Other AZ CIGNA HEALTHCARE
860957700 Other AZ HUMANA
2207187 Other AZ AZ PHYSICIANS IPA
100143 Other AZ HEALTHCARE COMPARE AFFORD

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Robert Hamburg?
Robert Hamburg is registered in NPPES with the primary taxonomy of Interventional Cardiology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-23.