NPPES file of Aug 9, 2026

Lauren Gail Breihan, M.D.

Internal Medicine Physician · Flagstaff, AZ

Lauren Gail Breihan, M.D. is an internal medicine physician with a practice address in Flagstaff, Arizona, and NPI 1497866495, issued on Aug 31, 2006. Check the license (Arizona 23601, as entered in NPPES) on the Arizona Medical Board; 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
1497866495
Name
Lauren Gail Breihan
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
23601 AZ
Self-reported in NPPES; status is on the state search
Practice location
3480 E. Route 66, Flagstaff, AZ 86004
Phone
(928) 863-7333
Enumerated
Aug 31, 2006
Record last updated
Mar 7, 2023
Fax
(928) 863-7347
Medicare enrollment
Enrolled (PECOS I20100322000222); accepts Medicare assignment
Medical or professional school
University Of Texas Southwestern Medical School At Dallas, 1982
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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Verify Lauren Gail Breihan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersArizona Medical Board
    Search for license 23601
    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 Arizona license search

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74% more Medicare Part D claims than the average internal medicine physician in 2024

5,533 Medicare Part D claims for 151 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 27 claims were for opioids.

  1. Lauren Breihan5,533
  2. Specialty average3,176

Most prescribed

  1. Rosuvastatin Calcium776 claims
  2. Lisinopril418 claims
  3. Levothyroxine Sodium244 claims
  4. Amlodipine Besylate234 claims
  5. Losartan Potassium229 claims
  6. Metformin Hcl Er229 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): 70.6 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 score39.7
  2. Costout of 100 · 30%63.1
  3. Promoting interoperabilityout of 100 · 25%79.0
  4. Improvement activities40 of 40 points · 15%100.0

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

One hospital affiliation

  1. Tuba City Regional Health Care CorporationTuba City, AZ · Acute Care Hospitals

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).

Lauren Gail Breihan among 2,853 internal medicine physician records in Arizona

Lauren Gail Breihan, M.D. is one of 2,853 internal medicine physician records with a practice address in Arizona. 75% 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 13% of them.

  • NPI issued2006 · 13% of these records are older, 55% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileYes · 58% of these records are
  • Graduated1982 · median 2003 among the 1,643 with a school on file
  • Record last updated2023 · 51% 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 Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Internal Medicine Physician providers in Arizona

There are 2,853 internal medicine physician records in Arizona.

The 8 internal medicine physician records with the nearest ZIP codes

  1. David Grauman, M.D., P.C., M.R.O.Flagstaff, AZ 860041508993429
  2. Anne Newland, MDFlagstaff, AZ 860041336178912
  3. Dennis Peat, M.D.Flagstaff, AZ 860041417901075
  4. Jennifer Cortes, M.D.Flagstaff, AZ 860011225204381
  5. Rafael Fernandez, MDFlagstaff, AZ 860011831484500
  6. Alexander Hu, D.O.Flagstaff, AZ 860011306145859
  7. Julia Jacobs, M.D.Flagstaff, AZ 860011285862482
  8. Jeffrey Mazique, MDFlagstaff, AZ 860011902905300

Common questions

What is Lauren Gail Breihan, M.D.'s NPI number?

Lauren Gail Breihan, M.D.'s National Provider Identifier (NPI) is 1497866495, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Lauren Gail Breihan, M.D. located?

The NPPES record lists a practice address at 3480 E. Route 66, Flagstaff, AZ, 86004. Phone: (928) 863-7333. Providers update this record themselves, so call before visiting.

How can I verify Lauren Gail Breihan, M.D.'s license?

NPPES lists Arizona license number 23601, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Lauren Gail Breihan, M.D. prescribe under Medicare Part D?

In 2024, Lauren Gail Breihan, M.D. had 5,533 Medicare Part D claims for 151 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.

What is Lauren Gail Breihan, M.D.'s MIPS final score?

The 2023 MIPS final score is 70.6 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.