Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephen Loos, MD

Diagnostic Radiology Physician in Carson City, NV · enumerated 2006.

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

National Provider Identifier

1336171107

Verified

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Registry record

Entity type Individual (Type 1)

Name Stephen Loos

Credential MD

Sex Male

Practice address 2874 N Carson St Ste 300, Carson City, NV, 89706

Phone (775) 888-1180

Fax (775) 852-6902

Enumeration date Jul 6, 2006

Last updated in NPPES Dec 18, 2017

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License G87406 (CA) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 10110 (NV) 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
FS4913489	Other	CA	MEDI-CAL
36291	Other	NV	MEDICARE PTAN
CK655Z	Other	CA	MEDICARE PTAN
002013225	Medicaid	NV	-
P00060925	Other	NV	RAILROAD

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 Stephen Loos?

Stephen Loos is registered in NPPES with the primary taxonomy of Diagnostic Radiology 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 2017-12-18.