Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Marshall Brandon Packard, MD

Undersea and Hyperbaric Medicine (Preventive Medicine) Physician in San Antonio, TX · enumerated 2006 · practices at O2 Docs Pllc.

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

National Provider Identifier

1538175443

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Registry record

Entity type Individual (Type 1)

Name Marshall Brandon Packard

Credential MD

Sex Male

Practice address San Antonio, TX, 78205

Phone (210) 223-1145

Fax (210) 615-7619

Enumeration date Jul 31, 2006

Last updated in NPPES Apr 3, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License L1419 (TX) Secondary

2083P0011X Undersea and Hyperbaric Medicine (Preventive Medicine) Physician Allopathic & Osteopathic Physicians · License L1419 (TX) 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
529251ZWH7	Other	-	MEDICARE PTAN
8EE324	Other	TX	BCBS ID
148874414	Medicaid	TX	-

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 Marshall Packard?

Marshall Packard is registered in NPPES with the primary taxonomy of Undersea and Hyperbaric Medicine (Preventive Medicine) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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O2 Docs Pllc Clinic/Center · San Antonio, TX NPI 1477993327

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-04-03.