Walter Ventayen, MD
Internal Medicine Physician · Lamont, CA
Walter Ventayen, MD is an internal medicine physician with a practice address in Lamont, California, and NPI 1841303286, issued on Aug 17, 2006. Check the license (California A66324, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Walter Ventayen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A66324 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8787 Hall Road, Lamont, CA 93241
- Phone
- (661) 845-3731
- Enumerated
- Aug 17, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (661) 845-1157
- Medicare enrollment
- Enrolled (PECOS I20100720000235); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 8787 Hall Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Scott Davis, DDSDentist1528162955
- Harold Eisenberg, PHARMACISTPharmacist1851454060
- Lawrence Garcia, MDObstetrics & Gynecology Physician1609989037
- Noel Perez, DDSDentist1326141979
Verify Walter Ventayen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A66324Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.8 times the Medicare Part D claims of the average internal medicine physician in 2024
15,205 Medicare Part D claims for 918 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 229 claims were for opioids.
Most prescribed
- Atorvastatin Calcium1,236 claims
- Amlodipine Besylate747 claims
- Metformin Hcl589 claims
- Levothyroxine Sodium547 claims
- Lisinopril482 claims
- Tamsulosin Hcl384 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.
Bills Medicare through one group practice
- Bakersfield Family Medical Group IncBakersfield, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Walter Ventayen among 17,696 internal medicine physician records in California
Walter Ventayen, MD 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1992 · median 2004 among the 11,065 with a school on file
- Record last updated2007 · 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).
2 internal medicine physician records list a practice address in Lamont
They are 2 of the 159 NPPES records with a practice address in Lamont, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Lamont → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Orestes Pavia Sanchez, M.D.Lamont, CA 932411841231263
- Gary Finstad, M.D.Lake Isabella, CA 932401184763633
- Paul Giem, MDLake Isabella, CA 932401366499774
- Robert Gross, DOLake Isabella, CA 932401396827358
- Phillip Martin, MDLake Isabella, CA 932401275580680
- James Ripple, M.D.Lemoore, CA 932461457579781
- Osvaldo Gutierrez-Navarro, MDLindsay, CA 932471407576192
- John Gavini, M.D.Hanford, CA 932301750328803
Common questions
What is Walter Ventayen, MD's NPI number?
Walter Ventayen, MD's National Provider Identifier (NPI) is 1841303286, issued on Aug 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Walter Ventayen, MD located?
The NPPES record lists a practice address at 8787 Hall Road, Lamont, CA, 93241. Phone: (661) 845-3731. Providers update this record themselves, so call before visiting.
How can I verify Walter Ventayen, MD's license?
NPPES lists California license number A66324, 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 Ventayen, MD prescribe under Medicare Part D?
In 2024, Walter Ventayen, MD had 15,205 Medicare Part D claims for 918 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.