NPPES file of Aug 9, 2026

Brian Christopher Geyer, M.D.

Emergency Medicine Physician · Phoenix, AZ

Brian Christopher Geyer, M.D. is an emergency medicine physician with a practice address in Phoenix, Arizona, and NPI 1891094637, issued on Mar 18, 2011. Check the license (Arizona 50259, 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 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1891094637
Name
Brian Christopher Geyer
Credential
M.D.
Primary taxonomy
Emergency Medicine Physician 207P00000X
License number
50259 AZ
Self-reported in NPPES; status is on the state search
Practice location
1300 N 12TH St, Phoenix, AZ 85006
Phone
(602) 839-6968
Enumerated
Mar 18, 2011
Record last updated
Jul 18, 2015 (not updated in 11 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20150820011623); accepts Medicare assignment
Medical or professional school
University Of Arizona College Of Medicine, 2011
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 emergency medicine physician records → All 1,494 in Arizona → Look up another NPI →

Also registered at 1300 N 12TH St

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

  1. Farshad Agahi, M.D.Obstetrics & Gynecology Physician1386886430
  2. Jacqueline Agenbroad, NPNurse Practitioner1447222328
  3. Nishant Anand, M.D.Emergency Medicine Physician1093847659
  4. Jacob Anderson, D.O.Family Medicine Physician1558708792
  5. Patricia Armstrong, PAPhysician Assistant1326015165
  6. Sandra Auvil, MDInternal Medicine Physician1215993464

Verify Brian Christopher Geyer in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersArizona Medical Board
    Search for license 50259    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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56% more Medicare Part D claims than the average emergency medicine physician in 2024

353 Medicare Part D claims for 223 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 36 claims were for opioids.

  1. Brian Geyer353
  2. Specialty average226

Most prescribed

  1. Cephalexin38 claims
  2. Naproxen32 claims
  3. Ondansetron Hcl26 claims
  4. Oxycodone-Acetaminophen25 claims
  5. Prednisone23 claims
  6. Azithromycin21 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.

Bills Medicare through 3 group practices

  1. Cep America- Arizona, PCSun City, AZ
  2. Emergency Professional Services PCPhoenix, AZ
  3. Tec Emergency Physicians OF Arizona, LLCMesa, AZ

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

Brian Christopher Geyer among 1,494 emergency medicine physician records in Arizona

Brian Christopher Geyer, M.D. is one of 1,494 emergency medicine physician records with a practice address in Arizona. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 53% of them.

  • NPI issued2011 · 53% of these records are older, 45% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 55% of these records are
  • Graduated2011 · median 2014 among the 828 with a school on file
  • Record last updated2015 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

394 emergency medicine physician records list a practice address in Phoenix

They are 394 of the 31,399 NPPES records with a practice address in Phoenix, and 1,494 emergency medicine physician records in Arizona.

All 1,494 in Arizona → Every provider in Phoenix → Emergency Medicine Physician nationwide →

The 8 emergency medicine physician records with the nearest ZIP codes

  1. Michael Bergman, MDPhoenix, AZ 850061770504292
  2. Moneesh Bhow, M.DPhoenix, AZ 850061215986096
  3. Andrzej Dmowski, MDPhoenix, AZ 850061518960996
  4. Robert Leigh, MDPhoenix, AZ 850061568483139
  5. Melissa Ludwig, MDPhoenix, AZ 850061750302352
  6. Alan Molk, MDPhoenix, AZ 850061134133580
  7. Ayrn O'Connor, M.D.Phoenix, AZ 850061194785063
  8. Robert Porter, DOPhoenix, AZ 850061275561565

Common questions

What is Brian Christopher Geyer, M.D.'s NPI number?

Brian Christopher Geyer, M.D.'s National Provider Identifier (NPI) is 1891094637, issued on Mar 18, 2011. An NPI identifies a provider in billing; it is not a license.

Where is Brian Christopher Geyer, M.D. located?

The NPPES record lists a practice address at 1300 N 12TH St, Phoenix, AZ, 85006. Phone: (602) 839-6968. Providers update this record themselves, so call before visiting.

How can I verify Brian Christopher Geyer, M.D.'s license?

NPPES lists Arizona license number 50259, 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 Brian Christopher Geyer, M.D. prescribe under Medicare Part D?

In 2024, Brian Christopher Geyer, M.D. had 353 Medicare Part D claims for 223 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.