Howard MasuokaMD

Gastroenterology·Stanford, CA

Howard Masuoka, MD is a Gastroenterology provider in Stanford, CA affiliated with 2 ambulatory surgery centers in CA, as of July 2026.

NPI1770630162
Registered2007
Centers2
StateCA
Class of2003

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Ambulatory surgery centers

Centers whose service lines match this provider’s. Affiliations change; verify independently.

Surgecenter Of Palo AltoPalo Alto, CA · Gastroenterology, General surgery, Ophthalmology, Pain management · 30 on panelView center →
Waverley Surgery Center LLCPalo Alto, CA · Gastroenterology, Orthopedics · 29 on panelView center →

Howard Masuoka at a glance

Provider: Howard Masuoka
Credential: MD
Specialty: Gastroenterology
Procedures: Gastroenterology CPT codes
Location: Stanford, CA
Medical school graduation: 2003
NPI registered: 2007
NPI: 1770630162
Snapshot: July 2026

Identity, specialty, and affiliations change over time. This is not an endorsement, and not clinical, billing, or legal advice. Providers may request corrections at founders@datalilyai.com. Read the DataLily AI data methodology.

Questions

Where does Howard Masuoka practice?

Howard Masuoka, MD is based in Stanford, CA and is affiliated with 2 ambulatory surgery centers: Surgecenter Of Palo Alto in Palo Alto, CA and Waverley Surgery Center LLC in Palo Alto, CA. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.

What is Howard Masuoka's NPI number?

Howard Masuoka's National Provider Identifier (NPI) is 1770630162, registered in 2007. Specialty on record: Gastroenterology; credential MD.

How many Gastroenterology providers in California work at ambulatory surgery centers?

547 Gastroenterology surgeons and proceduralists in California are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Howard Masuoka among them. The California Gastroenterology directory lists each one by city with credential, NPI, and center affiliations.

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