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DR. TIMOTHY ROSS DIESTELKAMP MD
NPI 1861998635
Radiology - Diagnostic Radiology in Phoenix, AZ

Active since April 02, 2018PECOS EnrolledAccepts Medicare Assignment
4302 E WHITTON AVE, PHOENIX, AZ 85018(251) 680-6451 Get Directions Write a Review

NPPES record last updated: April 29, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 29, 2024, Jun 11, 2023, Apr 6, 2019 (3 updates tracked since 2019).

About Dr. Timothy Ross Diestelkamp Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. TIMOTHY ROSS DIESTELKAMP MD (NPI 1861998635) is an individual diagnostic radiology provider in Phoenix, Arizona, licensed in Arizona (72505) and active in the NPI registry since April 2018. He is enrolled in Medicare PECOS and is a graduate of Cooper Medical School Of Rowan University (2018).

NPPES Registry Identity

NPI1861998635
Entity TypeIndividualMale
Primary Taxonomy2085R0202X
Provider Legal NameDR. TIMOTHY ROSS DIESTELKAMPCredential: MD
Location Address4302 E WHITTON AVEPhoenix, AZ 85018-5944
Mailing Address4302 E Whitton AvePhoenix, AZ 85018-5944
Phone(251) 680-6451
Sole ProprietorNo
Medical School CMSCooper Medical School Of Rowan UniversityGraduated 2018
Enumeration DateApril 2, 2018
Last NPPES UpdateApril 29, 20243 updates tracked since enumeration
NPPES CertifiedApril 29, 2024
✔ NPI 1861998635 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
License✔ Licensed in AZ · 72505
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
4302 E WHITTON AVE, Phoenix, AZ 85018
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona, Cigna HealthCare of Arizona, Inc.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

Dr. Timothy Ross Diestelkamp Md 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.

PECOS PAC ID2567709595
PECOS Enrollment IDI20240516002353
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Timothy Diestelkamp reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Southwest Diagnostic Imaging LLC
3.7 mi
Diagnostic Radiology
3501 N SCOTTSDALE ROAD, SUITE 130
Scottsdale, AZ 85251
  • Reassigned Medicare billing, Arizona and California enrollments
  • 156 clinicians in this Medicare group
NPI 1902896236 (480) 425-5078
Sonoran Radiology Ltd
9.6 mi
Vascular & Interventional Radiology
1400 S DOBSON RD
Mesa, AZ 85202
  • Reassigned Medicare billing, California and New York enrollments
  • 94 clinicians in this Medicare group
NPI 1033745708 (623) 299-8743

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 85018 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$85.89 typical visit price
range $55.44 – $168.60
Typical copayment $21.47 (range $13.86 – $42.15)
Most-billed visit code 99203
Established Patient
$69.24 typical visit price
range $17.72 – $137.41
Typical copayment $17.31 (range $4.43 – $34.35)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Timothy Diestelkamp's NPI number?

The NPI number for Timothy Diestelkamp is 1861998635. It was assigned to this individual provider in the NPPES registry on April 2, 2018.

Where is Timothy Diestelkamp located?

Timothy Diestelkamp practices at 4302 E Whitton Ave, Phoenix, AZ 85018. The listed phone number is (251) 680-6451.

What is Timothy Diestelkamp's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Timothy Diestelkamp enrolled in Medicare?

Yes. Timothy Diestelkamp 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 Timothy Diestelkamp's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Diestelkamp reassigns Medicare benefits to 2 organizations: Southwest Diagnostic Imaging LLC (Scottsdale, AZ) and Sonoran Radiology Ltd (Mesa, 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 Timothy Diestelkamp's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Timothy Diestelkamp accept?

Health plans from Blue Cross Blue Shield of Arizona and Cigna HealthCare of Arizona, Inc list Timothy Diestelkamp 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 Timothy Diestelkamp was last updated on April 29, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.