Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark David Watanabe, PHARMD, PHD

Psychiatric Pharmacist in San Francisco, CA · enumerated 2007.

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

National Provider Identifier

1104020841

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark David Watanabe

Credential PHARMD, PHD

Sex Male

Practice address 1380 Howard St Rm 130, San Francisco, CA, 94103

Phone (415) 255-3659

Enumeration date Jun 14, 2007

Last updated in NPPES May 15, 2018

Taxonomy & licenses

1835P1300X Psychiatric Pharmacist Pharmacy Service Providers · License 7242 (OR) Secondary

1835P1300X Psychiatric Pharmacist Pharmacy Service Providers · License 20773 (CO) Secondary

1835P1300X Psychiatric Pharmacist Pharmacy Service Providers · License 37324 (CA) Primary

PHARMD · Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy. About the PHARMD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1104020841 active?

Yes, as of the latest NPPES snapshot, NPI 1104020841 is active (record last updated 2018-05-15).

How do I verify Mark Watanabe's NPI record?

Cross-check NPI 1104020841 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 2018-05-15.