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

Marcus Sinewe, MD

Emergency Medicine Physician in Palo Alto, CA · enumerated 2017 · practices at Lucile Packard Stanford Children'S Hospital.

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

National Provider Identifier

1699206664

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Registry record

Entity type Individual (Type 1)

Name Marcus Sinewe

Credential MD

Sex Male

Practice address Palo Alto, CA, 94304

Phone (650) 723-4000

Enumeration date Mar 22, 2017

Last updated in NPPES Jul 31, 2025

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

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 35.147271 (OH) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 0101273419 (VA) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License A200900 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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

How do I verify Marcus Sinewe's NPI record?

Cross-check NPI 1699206664 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1699206664 active?

Yes, as of the latest NPPES snapshot, NPI 1699206664 is active (record last updated 2025-07-31).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-31.