NPPES file of Aug 9, 2026

Paul Warren Keiser, D.O.

Family Medicine Physician · Sun City West, AZ

Paul Warren Keiser, D.O. is a family medicine physician with a practice address in Sun City West, Arizona, and NPI 1982691994, issued on Oct 4, 2005. Check the license (Arizona 1964, 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
1982691994
Name
Paul Warren Keiser
Credential
D.O.
Primary taxonomy
Family Medicine Physician 207Q00000X
License numbers
1964 AZ
34-00-3533 OH
Self-reported in NPPES; status is on the state search
Practice location
14416 W Meeker Blvd, Sun City West, AZ 85375
Phone
(623) 583-5271
Enumerated
Oct 4, 2005
Record last updated
Jan 31, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax
(623) 583-5117
Medicaid ID
0940530 OH
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest family medicine physician records → All 3,119 in Arizona → Look up another NPI →

Also registered at 14416 W Meeker Blvd

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

  1. Samuel Ashby, D.O.Orthopaedic Surgery Physician1598150492
  2. Jasminder Bardin, NPFamily Nurse Practitioner1801546577
  3. Daniel Bozinovich, M.D.Internal Medicine Physician1518925460
  4. Thomas Chen, MDHematology & Oncology Physician1932149036
  5. Stephen Dault, MDFamily Medicine Physician1851331029
  6. Dennis Frazier, M.D.Family Medicine Physician1770553398

Verify Paul Warren Keiser in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersArizona Medical Board
    Search for license 1964    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

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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24% more Medicare Part D claims than the average family medicine physician in 2024

4,409 Medicare Part D claims for 550 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 75 claims were for opioids.

  1. Paul Keiser4,409
  2. Specialty average3,544

Most prescribed

  1. Levothyroxine Sodium285 claims
  2. Atorvastatin Calcium240 claims
  3. Amlodipine Besylate203 claims
  4. Lisinopril182 claims
  5. Simvastatin162 claims
  6. Omeprazole154 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: $18.18

1 payment: food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Paul Keiser$18.18
  2. Specialty average$902.55

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Paul Warren Keiser among 3,119 family medicine physician records in Arizona

Paul Warren Keiser, D.O. is one of 3,119 family 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 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 88% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileNo · 57% of these records are
  • Record last updated2008 · 54% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

10 family medicine physician records list a practice address in Sun City West

They are 10 of the 590 NPPES records with a practice address in Sun City West, and 3,119 family medicine physician records in Arizona.

All 3,119 in Arizona → Every provider in Sun City West → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. David Bennett, D.OSun City West, AZ 853751154375426
  2. Andrew Brainard, M.D.West Sun City, AZ 853751851340640
  3. Marcia Castro-GideonSun City West, AZ 853751710356183
  4. Stephen Dault, MDSun City West, AZ 853751851331029
  5. Dennis Frazier, M.D.Sun City West, AZ 853751770553398
  6. Judith Heath, MDSun City West, AZ 853751437199536
  7. Joel Jacobson, MDSun City West, AZ 853751144260241
  8. Janet Johns, M.D.Sun City West, AZ 853751588967830

Common questions

What is Paul Warren Keiser, D.O.'s NPI number?

Paul Warren Keiser, D.O.'s National Provider Identifier (NPI) is 1982691994, issued on Oct 4, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Paul Warren Keiser, D.O. located?

The NPPES record lists a practice address at 14416 W Meeker Blvd, Sun City West, AZ, 85375. Phone: (623) 583-5271. Providers update this record themselves, so call before visiting.

How can I verify Paul Warren Keiser, D.O.'s license?

NPPES lists Arizona license number 1964, 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 Paul Warren Keiser, D.O. prescribe under Medicare Part D?

In 2024, Paul Warren Keiser, D.O. had 4,409 Medicare Part D claims for 550 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.