Karl Robert Hamm, O.D.
Optometrist · Yuba City, CA
Karl Robert Hamm, O.D. is an optometrist with a practice address in Yuba City, California, and NPI 1093852105, issued on Jan 30, 2007. Check the license (California 8481T, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Karl Robert Hamm
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 8481T CA
Self-reported in NPPES; status is on the state search - Practice location
- 710 Onstott RD., Yuba City, CA 95991
- Phone
- (530) 755-0222
- Enumerated
- Jan 30, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Verify Karl Robert Hamm in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 8481TCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Karl Robert Hamm among 8,308 optometrist records in California
Karl Robert Hamm, O.D. is one of 8,308 optometrist records with a practice address in California. 67% 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 2007, is newer than 34% of them.
- NPI issued2007 · 34% of these records are older, 46% newer
- In a Medicare fileNo · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 43% of these records are
- Record last updated2007 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 optometrist records list a practice address in Yuba City
They are 21 of the 1,726 NPPES records with a practice address in Yuba City, and 8,308 optometrist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 8,308 in California → Every provider in Yuba City → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- David Bradley, O.D.Yuba City, CA 959911275504391
- Thomas Burk, O.D.Yuba City, CA 959911295895985
- Bradley Hamar, ODYuba City, CA 959911073090346
- Elizabeth Hankins, O.D.Yuba City, CA 959911841632643
- Thomas Sanders, ODYuba City, CA 959911336135086
- Donald Schwellenbach, O.D.Yuba City, CA 959911013123603
- Valliammai Subramanian, ODYuba City, CA 959911922837566
- Sukhdeep Takher, O.D.Yuba City, CA 959911760412845
Common questions
What is Karl Robert Hamm, O.D.'s NPI number?
Karl Robert Hamm, O.D.'s National Provider Identifier (NPI) is 1093852105, issued on Jan 30, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Karl Robert Hamm, O.D. located?
The NPPES record lists a practice address at 710 Onstott RD., Yuba City, CA, 95991. Phone: (530) 755-0222. Providers update this record themselves, so call before visiting.
How can I verify Karl Robert Hamm, O.D.'s license?
NPPES lists California license number 8481T, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
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.