NPPES file of Aug 9, 2026

Harold S. Walker, M.D.

Diagnostic Radiology Physician · Mesa, AZ

Harold S. Walker, M.D. is a diagnostic radiology physician with a practice address in Mesa, Arizona, and NPI 1831188499, issued on Oct 17, 2005. Check the license (Arizona 24034, 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 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1831188499
Name
Harold S. Walker
Credential
M.D.
Primary taxonomy
Diagnostic Radiology Physician 2085R0202X
License number
24034 AZ
Self-reported in NPPES; status is on the state search
Practice location
6424 E Broadway RD Ste 101, Mesa, AZ 85206
Phone
(480) 456-9000
Enumerated
Oct 17, 2005
Record last updated
Feb 13, 2019 (not updated in 7 years: call before relying on the address or phone)
Medicaid ID
110841 AZ
Medicare enrollment
Enrolled (PECOS I20040624000437); accepts Medicare assignment
Medical or professional school
University Of Utah School Of Medicine, 1984
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 diagnostic radiology physician records → All 869 in Arizona → Look up another NPI →

Also registered at 6424 E Broadway RD Ste 101

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

  1. Laura Baron, MDDiagnostic Radiology Physician1619016615
  2. Stephen Chang, M.D.Diagnostic Radiology Physician1568451284
  3. Jared Criddle, M.D.Diagnostic Radiology Physician1235364803
  4. Robert Crowder, MDDiagnostic Radiology Physician1649536376
  5. Anh Dao, M.D.Body Imaging Physician1326279738
  6. Christopher Davis, PA-CPhysician Assistant1659457281

Verify Harold S. Walker in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersArizona Medical Board
    Search for license 24034    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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Bills Medicare through one group practice

  1. Banner Imaging Services LLCGlendale, AZ

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

Harold S. Walker among 869 diagnostic radiology physician records in Arizona

Harold S. Walker, M.D. is one of 869 diagnostic radiology physician records with a practice address in Arizona. 72% 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, 84% newer
  • In a Medicare fileYes · 72% of these records are
  • In the CMS Doctors and Clinicians fileYes · 66% of these records are
  • Graduated1984 · median 2003 among the 573 with a school on file
  • Record last updated2019 · 56% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Diagnostic Radiology Physician providers in Arizona

There are 869 diagnostic radiology physician records in Arizona.

All 869 in Arizona → Every provider in Mesa → Diagnostic Radiology Physician nationwide →

The 8 diagnostic radiology physician records with the nearest ZIP codes

  1. Stephen Chang, M.D.Mesa, AZ 852061568451284
  2. Caryn Doudna, M.D.Mesa, AZ 852061669461380
  3. Craig Hancock, M.D.Mesa, AZ 852061982693693
  4. Mark Hoffman, M.D.Mesa, AZ 852061477542199
  5. Amal Jabra, M.D.Mesa, AZ 852061558350264
  6. James Lyons, M.D.Mesa, AZ 852061124017918
  7. Mark Madsen, M.D.Mesa, AZ 852061316936107
  8. John McGill, M.D.Mesa, AZ 852061649269424

Common questions

What is Harold S. Walker, M.D.'s NPI number?

Harold S. Walker, M.D.'s National Provider Identifier (NPI) is 1831188499, issued on Oct 17, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Harold S. Walker, M.D. located?

The NPPES record lists a practice address at 6424 E Broadway RD Ste 101, Mesa, AZ, 85206. Phone: (480) 456-9000. Providers update this record themselves, so call before visiting.

How can I verify Harold S. Walker, M.D.'s license?

NPPES lists Arizona license number 24034, 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.

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.