Timothy Lee Williamson, M.D.
Emergency Medicine Physician · Ojai, CA
Timothy Lee Williamson, M.D. is an emergency medicine physician with a practice address in Ojai, California, and NPI 1023168721, issued on Jan 12, 2007. Check the license (California G32937, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Timothy Lee Williamson
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G32937 CA
Self-reported in NPPES; status is on the state search - Practice location
- 207 Church RD, Ojai, CA 93023
- Phone
- (805) 646-4386
- Enumerated
- Jan 12, 2007
- Record last updated
- May 13, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (805) 646-9188
- Medicaid ID
- 00G329370 CA
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 207 Church RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Ann Williamson, R.N. F.N.P.Family Nurse Practitioner1255756276
Verify Timothy Lee Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G32937Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average emergency medicine physician in 2024
180 Medicare Part D claims for 65 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Levothyroxine Sodium16 claims
- Benazepril Hcl13 claims
- Atorvastatin Calcium12 claims
- Simvastatin12 claims
- Synthroid11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Timothy Lee Williamson among 7,751 emergency medicine physician records in California
Timothy Lee Williamson, M.D. is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 50% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2020 · 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 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 emergency medicine physician records list a practice address in Ojai
They are 7 of the 271 NPPES records with a practice address in Ojai, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Ojai → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Theodore Angus, MDOjai, CA 930231235195256
- Gordon Clawson, MDOjai, CA 930231932167541
- Elizabeth Kuge Parker, DOOjai, CA 930231043952005
- Sri Harsha Palakurty, M.D.Ojai, CA 930231609405281
- Elizabeth Patterson, MDOjai, CA 930231477510410
- Colin Walker, M.D.Ojai, CA 930231467729376
- Charles Drehsen, M.D.Moorpark, CA 930211609008960
- Van Anh Chandler, MEDICAL DOCTOROxnard, CA 930301154312114
Common questions
What is Timothy Lee Williamson, M.D.'s NPI number?
Timothy Lee Williamson, M.D.'s National Provider Identifier (NPI) is 1023168721, issued on Jan 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Lee Williamson, M.D. located?
The NPPES record lists a practice address at 207 Church RD, Ojai, CA, 93023. Phone: (805) 646-4386. Providers update this record themselves, so call before visiting.
How can I verify Timothy Lee Williamson, M.D.'s license?
NPPES lists California license number G32937, 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.
How much does Timothy Lee Williamson, M.D. prescribe under Medicare Part D?
In 2024, Timothy Lee Williamson, M.D. had 180 Medicare Part D claims for 65 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. 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.