Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Robert S Michaelson, D.O.

Undersea and Hyperbaric Medicine (Emergency Medicine) Physician in San Antonio, TX · enumerated 2006.

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

National Provider Identifier

1649258971

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Registry record

Entity type Individual (Type 1)

Name Mr. Robert S Michaelson

Credential D.O.

Sex Male

Practice address 7500 Barlite Blvd., Suite 107, San Antonio, TX, 78224

Phone (210) 921-3493

Fax (210) 921-3533

Enumeration date Jan 6, 2006

Last updated in NPPES Oct 31, 2018

Taxonomy & licenses

2083A0100X Aerospace Medicine Physician Allopathic & Osteopathic Physicians · License 34-00-3980- M (OH) Secondary

2083P0011X Undersea and Hyperbaric Medicine (Preventive Medicine) Physician Allopathic & Osteopathic Physicians · License N8691 (TX) Secondary

207PE0005X Undersea and Hyperbaric Medicine (Emergency Medicine) Physician Allopathic & Osteopathic Physicians · License N8691 (TX) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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

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 Michaelson?

Robert Michaelson is registered in NPPES with the primary taxonomy of Undersea and Hyperbaric Medicine (Emergency Medicine) 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 2018-10-31.