NPPES file of Aug 9, 2026

Bret Nicholas Namihas, M.D.

Gastroenterology Physician · Redding, CA

Bret Nicholas Namihas, M.D. is a gastroenterology physician with a practice address in Redding, California, and NPI 1215949722, issued on Aug 13, 2006. Check the license (California G58791, 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 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1215949722
Name
Bret Nicholas Namihas
Credential
M.D.
Primary taxonomy
Gastroenterology Physician 207RG0100X
License numbers
G58791 CA
00G587910 CA
Self-reported in NPPES; status is on the state search
Practice location
2147 Court St, Redding, CA 96001
Phone
(530) 243-8667
Enumerated
Aug 13, 2006
Record last updated
Dec 23, 2025
Fax
(530) 243-8742
Medicare enrollment
Enrolled (PECOS I20040909000480); 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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Also registered at 2147 Court St

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

  1. Fernando Becerra, DDSGeneral Practice Dentistry1669795472
  2. Piyush Dhanuka, M.D.Gastroenterology Physician1740230333
  3. Jason DunphyOrthotist1659569234
  4. Leo Eickhoff, M.D.Gastroenterology Physician1871609966
  5. Timothy Elliott, COOrthotist1760670228
  6. Kyung Hee Kang, FNPFamily Nurse Practitioner1205683380

Verify Bret Nicholas Namihas in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G58791
    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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71% fewer Medicare Part D claims than the average gastroenterology physician in 2024

239 Medicare Part D claims for 189 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims.

  1. Bret Namihas239
  2. Specialty average811

Most prescribed

  1. Sod Sulf-Potass Sulf-Mag Sulf135 claims
  2. Omeprazole35 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.

The practice group's MIPS final score for 2023 (Medicare payment program): 78.1 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualityout of 100 · 30% of the final score74.7
  2. Costout of 100 · 30%52.6
  3. Promoting interoperabilitynot scored (reweighted)
  4. Improvement activities30 of 40 points · 15%75.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Industry payments in 2024: $36.96

2 payments; by number, the most common kind was food and beverage; the largest payer was Intercept Pharmaceuticals, 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. Bret Namihas$36.96
  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.

2 hospitals and group practices

  1. Hazel Hawkins Memorial HospitalHollister, CA · Critical Access Hospitals
  2. Southern California Permanente Medical GroupAnaheim, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).

Bret Nicholas Namihas among 2,140 gastroenterology physician records in California

Bret Nicholas Namihas, 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
  • Graduated1987 · median 2002 among the 1,538 with a school on file
  • Record last updated2025 · 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.

The 8 gastroenterology physician records with the nearest ZIP codes

  1. Prathibha Chandrasekaran, M.D.Redding, CA 960011114985819
  2. Piyush Dhanuka, M.D.Redding, CA 960011740230333
  3. Leo Eickhoff, M.D.Redding, CA 960011871609966
  4. Hongguang Liu, M.D.Redding, CA 960011780892117
  5. Gaddam Reddy, MDRedding, CA 960011619997939
  6. Paramvir Singh, M.D.Redding, CA 960011346213444
  7. Paul Spinka, MDRedding, CA 960011457340937
  8. Akeel Halai, M.D.Redding, CA 960021437116449

Common questions

What is Bret Nicholas Namihas, M.D.'s NPI number?

Bret Nicholas Namihas, M.D.'s National Provider Identifier (NPI) is 1215949722, issued on Aug 13, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Bret Nicholas Namihas, M.D. located?

The NPPES record lists a practice address at 2147 Court St, Redding, CA, 96001. Phone: (530) 243-8667. Providers update this record themselves, so call before visiting.

How can I verify Bret Nicholas Namihas, M.D.'s license?

NPPES lists California license number G58791, 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 Bret Nicholas Namihas, M.D. prescribe under Medicare Part D?

In 2024, Bret Nicholas Namihas, M.D. had 239 Medicare Part D claims for 189 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.

What is Bret Nicholas Namihas, M.D.'s MIPS final score?

The 2023 MIPS final score is 78.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.

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.