NPPES file of Aug 9, 2026

Benjamin Tetsu Lish, M.D.

Family Medicine Physician · Ventura, CA

Benjamin Tetsu Lish, M.D. is a family medicine physician with a practice address in Ventura, California, and NPI 1417901067, issued on May 19, 2006. Check the license (California A67012, 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
1417901067
Name
Benjamin Tetsu Lish
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
A67012 CA
Self-reported in NPPES; status is on the state search
Practice location
120 N Ashwood Ave, Ventura, CA 93003
Phone
(805) 658-5800
Enumerated
May 19, 2006
Record last updated
Dec 26, 2013 (not updated in 13 years: call before relying on the address or phone)
Fax
(805) 639-0786
Medicaid IDs
RHM08609F CA
ZZT40394F CA
RHM08608F CA
RHM18553H CA
Medicare enrollment
Enrolled (PECOS I20040428000671); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
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 family medicine physician records → All 17,133 in California → Look up another NPI →

Also registered at 120 N Ashwood Ave

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

  1. Safwan Alboiny, M.D.Neurology Physician1427228956
  2. Patricia Almaguer Auchard, M.D.Pediatrics Physician1881695690
  3. Steven Barr, M.D.Internal Medicine Physician1972666980
  4. Candice Becker-Schwarm, CNMAdvanced Practice Midwife1710039680
  5. Veronica Butler, M.D.Family Medicine Physician1063472736
  6. Lisa Carbonell, MDObstetrics & Gynecology Physician1861780215

Verify Benjamin Tetsu Lish in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A67012    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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100% more Medicare Part D claims than the average family medicine physician in 2024

7,086 Medicare Part D claims for 357 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 705 claims were for opioids.

  1. Benjamin Lish7,086
  2. Specialty average3,544

Most prescribed

  1. Hydrocodone-Acetaminophen386 claims
  2. Alprazolam235 claims
  3. Amlodipine Besylate227 claims
  4. Atorvastatin Calcium211 claims
  5. Gabapentin202 claims
  6. Oxycodone Hcl183 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: $83.35

2 payments; by number, the most common kind was food and beverage; the largest payer was Averitas Pharma 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.

  1. Benjamin Lish$83.35
  2. Specialty average$902.55

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. Community Memorial Health SystemVentura, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Benjamin Tetsu Lish among 17,133 family medicine physician records in California

Benjamin Tetsu Lish, M.D. 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
  • Graduated1996 · median 2005 among the 10,652 with a school on file
  • Record last updated2013 · 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).

234 family medicine physician records list a practice address in Ventura

They are 234 of the 4,435 NPPES records with a practice address in Ventura, and 17,133 family medicine physician records in California.

All 17,133 in California → Every provider in Ventura → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. Charles Adams, M.D.Ventura, CA 930031811925225
  2. Veronica Butler, M.D.Ventura, CA 930031063472736
  3. Eric Chun, M.D.Ventura, CA 930031699702381
  4. Michelle Daucett, D.O.Ventura, CA 930031003873035
  5. Derrick Dcosta, M.D.Ventura, CA 930031487699005
  6. James Hermann, M.D.Ventura, CA 930031861442899
  7. Theodore Hole, M.D.Ventura, CA 930031104873611
  8. Andrew Kerr, M.D.Ventura, CA 930031487695078

Common questions

What is Benjamin Tetsu Lish, M.D.'s NPI number?

Benjamin Tetsu Lish, M.D.'s National Provider Identifier (NPI) is 1417901067, issued on May 19, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Benjamin Tetsu Lish, M.D. located?

The NPPES record lists a practice address at 120 N Ashwood Ave, Ventura, CA, 93003. Phone: (805) 658-5800. Providers update this record themselves, so call before visiting.

How can I verify Benjamin Tetsu Lish, M.D.'s license?

NPPES lists California license number A67012, 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 Benjamin Tetsu Lish, M.D. prescribe under Medicare Part D?

In 2024, Benjamin Tetsu Lish, M.D. had 7,086 Medicare Part D claims for 357 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.

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.