Zachary Jon Walder, DO
Internal Medicine Physician · Placerville, CA
Zachary Jon Walder, DO is an internal medicine physician with a practice address in Placerville, California, and NPI 1417585597, issued on Apr 1, 2020. Check the license (California 20A21369, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Zachary Jon Walder
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A21369 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4212 Missouri Flat RD, Placerville, CA 95667
- Phone
- (530) 621-7700
- Enumerated
- Apr 1, 2020
- Record last updated
- Jan 4, 2024
- Fax
- (530) 621-7713
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
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A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Talvinder BainsPharmacist1194122036
Verify Zachary Jon Walder in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A21369Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average internal medicine physician in 2024
3,172 Medicare Part D claims for 317 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 209 claims were for opioids.
Most prescribed
- Atorvastatin Calcium165 claims
- Lisinopril164 claims
- Hydrocodone-Acetaminophen127 claims
- Amlodipine Besylate100 claims
- Gabapentin94 claims
- Omeprazole83 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.
Zachary Jon Walder among 17,696 internal medicine physician records in California
Zachary Jon Walder, DO is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 89% of them.
- NPI issued2020 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2024 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Placerville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ketan Ajudia, M.D.Placerville, CA 956671114934866
- Joe AlfeghalyPlacerville, CA 956671548831027
- Cesar Ang, MDPlacerville, CA 956671225010218
- Gerardo Galang, MDPlacerville, CA 956671790711034
- Robert Macy, MDPlacerville, CA 956671184630147
- Thanh Trang Nguyen, MDPlacerville, CA 956671497907083
- Mohammed Siddiqi, MDPlacerville, CA 956671003933094
- Josefina Aquino, M.D.Rancho Cordova, CA 956701427021229
Common questions
What is Zachary Jon Walder, DO's NPI number?
Zachary Jon Walder, DO's National Provider Identifier (NPI) is 1417585597, issued on Apr 1, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Zachary Jon Walder, DO located?
The NPPES record lists a practice address at 4212 Missouri Flat RD, Placerville, CA, 95667. Phone: (530) 621-7700. Providers update this record themselves, so call before visiting.
How can I verify Zachary Jon Walder, DO's license?
NPPES lists California license number 20A21369, 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 Zachary Jon Walder, DO prescribe under Medicare Part D?
In 2024, Zachary Jon Walder, DO had 3,172 Medicare Part D claims for 317 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.