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

John R Marshall, DO

Addiction Psychiatry Physician in Arlington, TX · enumerated 2007 · practices at Murray Skaggs,M.D.,P.A..

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

National Provider Identifier

1033263009

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Registry record

Entity type Individual (Type 1)

Name John R Marshall

Credential DO

Sex Male

Practice address Arlington, TX, 76011

Phone (817) 860-6067

Fax (817) 860-6016

Enumeration date Jan 23, 2007

Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

2084P0802X Addiction Psychiatry Physician Allopathic & Osteopathic Physicians · License G5333 (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

Other identifiers

Identifier	Type	State	Issuer
P000FS95	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

Where does John Marshall practice?

The practice location on file with NPPES is in Arlington, TX. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for John Marshall?

The National Provider Identifier (NPI) for John Marshall is 1033263009, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Murray Skaggs,M.D.,P.A. Psychiatry Physician · Arlington, TX NPI 1073841409

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.