Louis H. Watson, MD
Surgery Physician · Upland, CA
Louis H. Watson, MD is a surgery physician with a practice address in Upland, California, and NPI 1730280827, issued on Sep 25, 2006. Check the license (California G32156, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Louis H. Watson
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- G32156 CA
Self-reported in NPPES; status is on the state search - Practice location
- 99 N San Antonio Ave, Upland, CA 91786
- Phone
- (909) 931-1800
- Enumerated
- Sep 25, 2006
- Record last updated
- Jun 29, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (909) 931-1855
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 99 N San Antonio Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Frankie Utzurrum, M.D.Pulmonary Disease Physician1053505982
Verify Louis H. Watson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G32156Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Louis H. Watson among 3,118 surgery physician records in California
Louis H. Watson, MD is one of 3,118 surgery physician records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileNo · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2011 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,118 in California → Every provider in Upland → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Donald Alpiner, DOUpland, CA 917861811086952
- Kenneth Baik, MDUpland, CA 917861689651135
- Bryce Beseth, M.D.Upland, CA 917861811929243
- Donna Dudziak, M.D.Upland, CA 917861275630568
- Irene Houari, MDUpland, CA 917861104060466
- Nabil Koudsi, MDUpland, CA 917861750411070
- Stanley Saul, D.O.Upland, CA 917861255366936
- Adam Sugihara, M.D.Upland, CA 917861316172836
Common questions
What is Louis H. Watson, MD's NPI number?
Louis H. Watson, MD's National Provider Identifier (NPI) is 1730280827, issued on Sep 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Louis H. Watson, MD located?
The NPPES record lists a practice address at 99 N San Antonio Ave, Upland, CA, 91786. Phone: (909) 931-1800. Providers update this record themselves, so call before visiting.
How can I verify Louis H. Watson, MD's license?
NPPES lists California license number G32156, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.