Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert Marshall Lowen, MD

Specialist in Mountain View, CA · enumerated 2006.

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

National Provider Identifier

1659452787

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert Marshall Lowen

Credential MD

Sex Male

Practice address 305 South Dr, Suite1, Mountain View, CA, 94040

Phone (650) 965-7888

Fax (650) 965-0147

Enumeration date Oct 17, 2006

Last updated in NPPES Jan 20, 2010

Taxonomy & licenses

174400000X Specialist Other Service Providers · License G23412 (CA) 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
CJ705Z	Other	CA	PTAN

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1659452787 active?

Yes, as of the latest NPPES snapshot, NPI 1659452787 is active (record last updated 2010-01-20).

How do I verify Robert Lowen's NPI record?

Cross-check NPI 1659452787 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-01-20.