Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert Hacker, M.D.

Vascular Surgery Physician in Lake St Louis, MO · enumerated 2008.

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

National Provider Identifier

1295985554

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert Hacker

Credential M.D.

Sex Male

Practice address 1300 Hrc Plaza Dr, Lake St Louis, MO, 63367

Phone (314) 755-1084

Enumeration date Sep 23, 2008

Last updated in NPPES Jan 16, 2024

Taxonomy & licenses

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License MD444137 (PA) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 252045 (NY) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 35126367 (OH) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 46827 (KY) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 2019008677 (MO) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

What specialty is Robert Hacker?

Robert Hacker is registered in NPPES with the primary taxonomy of Vascular Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

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Deena Chihade Vascular Surgery Physician · Lake St Louis, MO NPI 1104113802

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-16.