NPPES file of Aug 9, 2026

Matthew Eric Viernes, M.D.

Gastroenterology Physician · Oceanside, CA

Matthew Eric Viernes, M.D. is a gastroenterology physician with a practice address in Oceanside, California, and NPI 1730158650, issued on Mar 14, 2006. Check the license (California A61516, 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
1730158650
Name
Matthew Eric Viernes
Credential
M.D.
Primary taxonomy
Gastroenterology Physician 207RG0100X
License number
A61516 CA
Self-reported in NPPES; status is on the state search
Practice location
3923 Waring RD Ste A, Oceanside, CA 92056
Phone
(760) 724-8782
Enumerated
Mar 14, 2006
Record last updated
Feb 25, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(760) 842-7801
Medicaid ID
00A615160 CA
Medicare enrollment
Enrolled (PECOS I20100519000516); accepts Medicare assignment
Medical or professional school
University Of Wisconsin School Of Medicine, 1995
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 gastroenterology physician records → All 2,140 in California → Look up another NPI →

Also registered at 3923 Waring RD Ste A

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

  1. Sara Andolina, NPFamily Nurse Practitioner1194142570
  2. Hellen Chiao, MDGastroenterology Physician1154681435
  3. Tobiah Clukey, FNP-CFamily Nurse Practitioner1306525662
  4. Christopher Devereaux, M.D.Gastroenterology Physician1376512848
  5. Megan Novo, MDGastroenterology Physician1770961971
  6. Javaid Shad, M.D.Gastroenterology Physician1003885922

Verify Matthew Eric Viernes in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A61516    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

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13% fewer Medicare Part D claims than the average gastroenterology physician in 2024

702 Medicare Part D claims for 396 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.

  1. Matthew Viernes702
  2. Specialty average811

Most prescribed

  1. Sod Sulf-Potass Sulf-Mag Sulf248 claims
  2. Pantoprazole Sodium138 claims
  3. Gavilyte-C38 claims
  4. Creon23 claims
  5. Linzess19 claims
  6. Omeprazole19 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: $2,171.71

112 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Matthew Viernes$2,171.71
  2. Specialty average$5,015.95

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. North County Gastroenterology Medical Group IncOceanside, CA

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

Matthew Eric Viernes among 2,140 gastroenterology physician records in California

Matthew Eric Viernes, M.D. is one of 2,140 gastroenterology physician records with a practice address in California. 83% 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 7% of them.

  • NPI issued2006 · 7% of these records are older, 48% newer
  • In a Medicare fileYes · 83% of these records are
  • In the CMS Doctors and Clinicians fileYes · 72% of these records are
  • Graduated1995 · median 2002 among the 1,538 with a school on file
  • Record last updated2021 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Gastroenterology Physician providers in California

There are 2,140 gastroenterology physician records in California.

All 2,140 in California → Every provider in Oceanside → Gastroenterology Physician nationwide →

The 8 gastroenterology physician records with the nearest ZIP codes

  1. Hellen Chiao, MDOceanside, CA 920561154681435
  2. Christopher Devereaux, M.D.Oceanside, CA 920561376512848
  3. Michael Kurtz, M.D.Oceanside, CA 920561487623955
  4. Megan Novo, MDOceanside, CA 920561770961971
  5. Javaid Shad, M.D.Oceanside, CA 920561003885922
  6. Michael Shim, M.D.Oceanside, CA 920561851503353
  7. Sudha Praba, MDCamp Pendleton, CA 920551730171489
  8. Mazer Ally, M.D.Oceanside, CA 920541902018666

Common questions

What is Matthew Eric Viernes, M.D.'s NPI number?

Matthew Eric Viernes, M.D.'s National Provider Identifier (NPI) is 1730158650, issued on Mar 14, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Matthew Eric Viernes, M.D. located?

The NPPES record lists a practice address at 3923 Waring RD Ste A, Oceanside, CA, 92056. Phone: (760) 724-8782. Providers update this record themselves, so call before visiting.

How can I verify Matthew Eric Viernes, M.D.'s license?

NPPES lists California license number A61516, 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 Matthew Eric Viernes, M.D. prescribe under Medicare Part D?

In 2024, Matthew Eric Viernes, M.D. had 702 Medicare Part D claims for 396 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.