HAROLD S WALKER M.D.
NPI 1831188499
Radiology - Diagnostic Radiology in Mesa, AZ
About Harold S Walker M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HAROLD S WALKER M.D. (NPI 1831188499) is an individual diagnostic radiology provider in Mesa, Arizona, licensed in Arizona (24034) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, maintains a secondary practice location in Mesa, and is a graduate of University Of Utah School Of Medicine (1984).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Harold S Walker M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Harold Walker reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Mesa, AZ 85202
- Reassigned Medicare billing, Arizona enrollment
- 447 clinicians in this Medicare group
Glendale, AZ 85304
- Reassigned Medicare billing, Arizona enrollment
- 214 clinicians in this Medicare group
Casa Grande, AZ 85122
- Reassigned Medicare billing, Arizona enrollment
- 211 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 85206 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MESA, AZ 85206
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Harold Walker's NPI number?
The NPI number for Harold Walker is 1831188499. It was assigned to this individual provider in the NPPES registry on October 17, 2005.
Where is Harold Walker located?
Harold Walker practices at 6424 E Broadway Rd Ste 101, Mesa, AZ 85206. The listed phone number is (480) 456-9000.
What is Harold Walker's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Harold Walker enrolled in Medicare?
Yes. Harold Walker is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Harold Walker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Harold Walker reassigns Medicare benefits to 3 organizations: Sonoran Radiology Ltd (Mesa, AZ), Associated Valley Radiologists Ltd (Glendale, AZ) and Banner Imaging Services LLC (Casa Grande, AZ). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Harold Walker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Harold Walker accept?
Health plans from Blue Cross Blue Shield of Arizona and Oscar Health Plan, Inc. list Harold Walker as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Harold Walker was last updated on February 13, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Harold S Walker, M.D. · NPI 1831188499
Diagnostic Radiology physician in Mesa, Arizona. Individual provider, active in the CMS NPPES registry since October 17, 2005.
## Identity
- **NPI:** 1831188499 (Entity type: Individual)
- **Enumerated:** October 17, 2005
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** 24034 (Arizona)
- **Sole proprietor:** No
## Practice location
- **Address:** 6424 E BROADWAY RD STE 101, Mesa, AZ 85206-1750
- **Phone:** (480) 456-9000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Sonoran Radiology Ltd (NPI 1033745708, Mesa, AZ); Associated Valley Radiologists Ltd (NPI 1932683257, Glendale, AZ); Banner Imaging Services LLC (NPI 1841846920, Casa Grande, AZ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Utah School Of Medicine, class of 1984
## Record status
- **NPPES last updated:** February 13, 2019
- **Other identifiers:** Medicaid 110841 (AZ)
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Source: [NPI Profile](https://npiprofile.com/npi/1831188499) · Data from the CMS NPPES public registry.