NPPES file of Aug 9, 2026

Michael James Krier, M.D.

Gastroenterology Physician · Fairfield, CA

Michael James Krier, M.D. is a gastroenterology physician with a practice address in Fairfield, California, and NPI 1497808414, issued on Jan 21, 2007. Check the license (California A100295, 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
1497808414
Name
Michael James Krier
Credential
M.D.
Primary taxonomy
Gastroenterology Physician 207RG0100X
License number
A100295 CA
Self-reported in NPPES; status is on the state search
Practice location
101 Bodin Cir, Fairfield, CA 94535
Phone
(707) 423-4501
Enumerated
Jan 21, 2007
Record last updated
Apr 8, 2016 (not updated in 10 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20160419002549); accepts Medicare assignment
Medical or professional school
Wright State University Boonshoft School Of Medicine, 2004
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 101 Bodin Cir

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

  1. Angela Aguayo, MSWSocial Worker1225504897
  2. Artemio Alanis, PHARMDOncology Pharmacist1396513982
  3. Traci Allen, RNCase Management Registered Nurse1669292132
  4. Rachel Anderson, MDAnesthesiology Physician1942730072
  5. Eugene Asabor, DDSDentist1568300242
  6. Savannah Bahls, DOMilitary Health Care Provider1619764008

Verify Michael James Krier in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A100295    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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82% more Medicare Part D claims than the average gastroenterology physician in 2024

1,478 Medicare Part D claims for 460 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.

  1. Michael Krier1,478
  2. Specialty average811

Most prescribed

  1. Pantoprazole Sodium343 claims
  2. Famotidine208 claims
  3. Omeprazole188 claims
  4. Gavilyte-C105 claims
  5. Gavilyte-G59 claims
  6. Sod Sulf-Potass Sulf-Mag Sulf51 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: $1,507.59

63 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. Michael Krier$1,507.59
  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 2 group practices

  1. Northbay Health Medical FoundationVacaville, CA
  2. Northbay Physicians Surgery Center, LLCFairfield, CA

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

Michael James Krier among 2,140 gastroenterology physician records in California

Michael James Krier, 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 2007, is newer than 52% of them.

  • NPI issued2007 · 52% of these records are older, 37% newer
  • In a Medicare fileYes · 83% of these records are
  • In the CMS Doctors and Clinicians fileYes · 72% of these records are
  • Graduated2004 · median 2002 among the 1,538 with a school on file
  • Record last updated2016 · 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 Fairfield → Gastroenterology Physician nationwide →

The 8 gastroenterology physician records with the nearest ZIP codes

  1. Zachary Eagle, MDTravis Afb, CA 945351689166290
  2. Douglas Taylor, D.O.Travis Afb, CA 945351649699737
  3. Suk Whang, M.D.Travis Afb, CA 945351619041316
  4. Mounzer Al Samman, M.D.Fairfield, CA 945341700822160
  5. Lawrence Chan, M.D.Fairfield, CA 945341356558332
  6. Nazia Hasan, M.D., M.P.H.Fairfield, CA 945341831394667
  7. Kenneth Kelsen, MDFremont, CA 945361538292321
  8. Frances Lee, DOFairfield, CA 945341881952737

Common questions

What is Michael James Krier, M.D.'s NPI number?

Michael James Krier, M.D.'s National Provider Identifier (NPI) is 1497808414, issued on Jan 21, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Michael James Krier, M.D. located?

The NPPES record lists a practice address at 101 Bodin Cir, Fairfield, CA, 94535. Phone: (707) 423-4501. Providers update this record themselves, so call before visiting.

How can I verify Michael James Krier, M.D.'s license?

NPPES lists California license number A100295, 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 Michael James Krier, M.D. prescribe under Medicare Part D?

In 2024, Michael James Krier, M.D. had 1,478 Medicare Part D claims for 460 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.