Walter Zaks, M. D.
Family Medicine Physician · Benicia, CA
Walter Zaks, M. D. is a family medicine physician with a practice address in Benicia, California, and NPI 1316906704, issued on Mar 22, 2006. Check the license (California G34777, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Walter Zaks
- Credential
- M. D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G34777 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1440 Military W, Benicia, CA 94510
- Phone
- (707) 745-0711
- Enumerated
- Mar 22, 2006
- Entity
- Type 1 · individual
Also registered at 1440 Military W
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Shelly Maramonte, M. D.Family Medicine Physician1205895695
- Taiyun Roe, M. D.Family Medicine Physician1457312753
Verify Walter Zaks in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G34777Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
11% fewer Medicare Part D claims than the average family medicine physician in 2024
3,139 Medicare Part D claims for 279 beneficiaries, against an average of 3,519 among the 111,126 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 86 claims were for opioids.
Most prescribed
- Atorvastatin Calcium379 claims
- Amlodipine Besylate143 claims
- Tamsulosin Hcl134 claims
- Escitalopram Oxalate110 claims
- Lisinopril-Hydrochlorothiazide99 claims
- Levothyroxine Sodium92 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.
10 family medicine physician records list a Benicia practice address
They are 10 of the 271 NPPES records with a Benicia practice address, and 16,272 family medicine physician records in California.
All 10 in Benicia → All 16,272 in California → Every provider in Benicia →
Other family medicine physician records in California
- Omer Aba-Omer, MDSanta Monica, CA1649702093
- Michelle Ababa, MDWilmington, CA1710922513
- Anna Tzeitel Abalos, MDRoseville, CA1720200017
- Adan Abarca, MDAnaheim, CA1760553689
- Vanessa Abarca, DOVentura, CA1952040859
- Lorraine Abate, M.D.Sacramento, CA1104840008
- Robert Abatecola, MDCastro Valley, CA1669551719
- Romeo Abaya, M.D.Cottonwood, CA1598053506
- Effiem Abbah, MD, MPHSan Francisco, CA1821185133
- Khuzeman Abbasi, MDSanta Rosa, CA1841979952
Common questions
What is Walter Zaks, M. D.'s NPI number?
Walter Zaks, M. D.'s National Provider Identifier (NPI) is 1316906704, issued on Mar 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Walter Zaks, M. D. located?
The NPPES record lists a practice address at 1440 Military W, Benicia, CA, 94510. Phone: (707) 745-0711. Providers update this record themselves, so call before visiting.
How can I verify Walter Zaks, M. D.'s license?
NPPES lists California license number G34777, 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 Zaks, M. D. prescribe under Medicare Part D?
In 2024, Walter Zaks, M. D. had 3,139 Medicare Part D claims for 279 beneficiaries; the average among family medicine physician prescribers was 3,519. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.