NPPES file of Aug 9, 2026

Rowena Velasquez Ventayen, M.D.

Internal Medicine Physician · Bakersfield, CA

Rowena Velasquez Ventayen, M.D. is an internal medicine physician with a practice address in Bakersfield, California, and NPI 1952363376, issued on Apr 3, 2006. Check the license (California A66323, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1952363376
Name
Rowena Velasquez Ventayen
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
A66323 CA
Self-reported in NPPES; status is on the state search
Practice location
3008 Sillect Ave, Bakersfield, CA 93308
Phone
(661) 616-9300
Enumerated
Apr 3, 2006
Record last updated
Jun 11, 2014 (not updated in 12 years: call before relying on the address or phone)
Fax
(661) 616-9301
Medicare enrollment
Enrolled (PECOS I20060419000625); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →

Also registered at 3008 Sillect Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Muhammad Alim, MDPulmonary Disease Physician1588619464
  2. William Baker, M.D.Internal Medicine Physician1720040793
  3. Patrick Daley, M.D.Family Medicine Physician1285624502
  4. Kimberly Hatton, NPNurse Practitioner1861839425
  5. Janice Knowlton, PAMedical Physician Assistant1912116096
  6. Anthonia Okoyeuzu, RNFamily Nurse Practitioner1467287664

Verify Rowena Velasquez Ventayen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A66323    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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68% more Medicare Part D claims than the average internal medicine physician in 2024

5,321 Medicare Part D claims for 419 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 12 claims were for opioids.

  1. Rowena Ventayen5,321
  2. Specialty average3,176

Most prescribed

  1. Atorvastatin Calcium563 claims
  2. Levothyroxine Sodium444 claims
  3. Losartan Potassium375 claims
  4. Amlodipine Besylate365 claims
  5. Metformin Hcl159 claims
  6. Alendronate Sodium136 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: $31.65

2 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Rowena Ventayen$31.65
  2. Specialty average$1,303.06

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

  1. 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).

Rowena Velasquez Ventayen among 17,696 internal medicine physician records in California

Rowena Velasquez Ventayen, M.D. 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 updated2014 · 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).

214 internal medicine physician records list a practice address in Bakersfield

They are 214 of the 11,539 NPPES records with a practice address in Bakersfield, and 17,696 internal medicine physician records in California.

All 17,696 in California → Every provider in Bakersfield → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. William Baker, M.D.Bakersfield, CA 933081720040793
  2. Cameron Chang, M.D.Bakersfield, CA 933081659504330
  3. Henry Chien, M.D.Bakersfield, CA 933081922530864
  4. Maria David, MDBakersfield, CA 933081780775007
  5. Kyle Heber, M.D.Bakersfield, CA 933081811384787
  6. Sasank IsolaBakersfield, CA 933081598247223
  7. Arun Keni, MDBakersfield, CA 933081427050871
  8. Adam Klang, MDBakersfield, CA 933081386732246

Common questions

What is Rowena Velasquez Ventayen, M.D.'s NPI number?

Rowena Velasquez Ventayen, M.D.'s National Provider Identifier (NPI) is 1952363376, issued on Apr 3, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Rowena Velasquez Ventayen, M.D. located?

The NPPES record lists a practice address at 3008 Sillect Ave, Bakersfield, CA, 93308. Phone: (661) 616-9300. Providers update this record themselves, so call before visiting.

How can I verify Rowena Velasquez Ventayen, M.D.'s license?

NPPES lists California license number A66323, 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 Rowena Velasquez Ventayen, M.D. prescribe under Medicare Part D?

In 2024, Rowena Velasquez Ventayen, M.D. had 5,321 Medicare Part D claims for 419 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.