npidata.org
Products
Provider RadarWatch an area and specialty — weekly alerts on new cliniciansPractice RadarWeekly alerts when new organisations register nearbySpecialtiesEvery NUCC taxonomy, with counts by state and cityStatesProvider counts and breakdowns for all 50 statesPhysician listsMDs and DOs with addresses and phone numbersNP listsNurse practitioners, the fastest-growing groupAPIJSON, delta feed, free tier
Use cases
Healthcare sales prospectingPhysician recruiting and locum staffingMedical device sales territory planningCredentialing and provider verificationHealthcare marketing lists and audience buildingPharmaceutical sales and prescriber targeting
Account
Start freeThree radars and an export a month Sign in Pricing
Explore
Data Labs API
About
About usTermsPrivacyContact us

Search › California › Colon & Rectal Surgery Physician

William Oh, M.D

NPI 1598100323 · on the registry since 2013

Practice

Address
16405 Sand Canyon Ave Ste 280
Irvine, CA 92618
Phone
(949) 557-0370
Fax
(949) 557-0370
Organisation at this address
One Physicians Pc
Pain Free Essentials
Gregory T Whitman Md Inc
Foot And Ankle Specialist
Irvine Surgical Partners Llc
Inferred from a shared address, not stated in the registry.
Clinicians at this address
26

Registry record

Primary taxonomy
Colon & Rectal Surgery Physician
208C00000X
Licence states on file
CA
From the registry's licence fields, which are often incomplete.
Sex
Male
Record last updated
2026-05-07

Source: CMS National Plan and Provider Enumeration System. Registration is not the same as practising, and the registry records no retirement — some people listed here no longer practise. More in California