Walter Thomas, MD
Family Medicine Physician · Simi Valley, CA
Walter Thomas, MD is a family medicine physician with a practice address in Simi Valley, California, and NPI 1952379463, issued on Mar 9, 2006. Check the license (California A34536, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Walter Thomas
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A34536 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1980 Sequoia Ave, Simi Valley, CA 93063
- Phone
- (805) 527-1804
- Enumerated
- Mar 9, 2006
- Record last updated
- Dec 17, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (805) 527-5241
- Medicare enrollment
- Enrolled (PECOS I20101101001082); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1980 Sequoia Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Beverley Kornder, M.D.Family Medicine Physician1477583110
- Paul Lefko, PTPhysical Therapist1952489668
- Brian Schnare, M.D.Family Medicine Physician1992747489
- Ingrid Sharpe, PA-CPhysician Assistant1144619784
- Margaret Soriano, NURSE PRACTITIONERFamily Medicine Physician1083471361
Verify Walter Thomas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A34536Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% fewer Medicare Part D claims than the average family medicine physician in 2024
3,443 Medicare Part D claims for 269 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 22 claims were for opioids.
Most prescribed
- Buprenorphine-Naloxone159 claims
- Gabapentin147 claims
- Buprenorphine Hcl130 claims
- Lisinopril122 claims
- Rosuvastatin Calcium117 claims
- Atorvastatin Calcium115 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.
Industry payments in 2024: $1,061.49
40 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Walter Thomas MD A Medical CorporationSimi Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Walter Thomas among 17,133 family medicine physician records in California
Walter Thomas, MD is one of 17,133 family 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1973 · median 2005 among the 10,652 with a school on file
- Record last updated2019 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
60 family medicine physician records list a practice address in Simi Valley
They are 60 of the 1,397 NPPES records with a practice address in Simi Valley, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Simi Valley → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Robyn Glezer, D.O.Simi Valley, CA 930631427340488
- Denise Hom, MDSimi Valley, CA 930631003809187
- Beverley Kornder, M.D.Simi Valley, CA 930631477583110
- Sukhmani Layal, M.D.Simi Valley, CA 930631194011734
- Mahfam Mohseni, MDSimi Valley, CA 930631548420771
- Madeline Sanchez, M.D.Simi Valley, CA 930631649619800
- Brian Schnare, M.D.Simi Valley, CA 930631992747489
- Margaret Soriano, NURSE PRACTITIONERSimi Valley, CA 930631083471361
Common questions
What is Walter Thomas, MD's NPI number?
Walter Thomas, MD's National Provider Identifier (NPI) is 1952379463, issued on Mar 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Walter Thomas, MD located?
The NPPES record lists a practice address at 1980 Sequoia Ave, Simi Valley, CA, 93063. Phone: (805) 527-1804. Providers update this record themselves, so call before visiting.
How can I verify Walter Thomas, MD's license?
NPPES lists California license number A34536, 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 Walter Thomas, MD prescribe under Medicare Part D?
In 2024, Walter Thomas, MD had 3,443 Medicare Part D claims for 269 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.