MARK WILLIAM DEARDORFF M.D.
NPI 1700859592
Pediatrics in Gilbert, AZ
About Mark William Deardorff M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK WILLIAM DEARDORFF M.D. (NPI 1700859592) is an individual pediatrics provider in Gilbert, Arizona, licensed in Arizona (15804) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mark William Deardorff M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mark Deardorff reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Mesa, AZ 85206
- Reassigned Medicare billing, Arizona enrollment
- Medicare enrollment name: Phoenix Children's Hospital
- 1,416 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 85296 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 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Mark Deardorff's NPI number?
The NPI number for Mark Deardorff is 1700859592. It was assigned to this individual provider in the NPPES registry on February 10, 2006.
Where is Mark Deardorff located?
Mark Deardorff practices at 120 S Val Vista Dr, Gilbert, AZ 85296. The listed phone number is (480) 733-6500.
What is Mark Deardorff's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Mark Deardorff enrolled in Medicare?
Yes. Mark Deardorff is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mark Deardorff's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Deardorff reassigns Medicare benefits to Phoenix Children's Medical Group (Mesa, AZ). The 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 Mark Deardorff's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Mark Deardorff was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.
# Mark William Deardorff, M.D. · NPI 1700859592
Pediatrics physician in Gilbert, Arizona. Individual provider, active in the CMS NPPES registry since February 10, 2006.
## Identity
- **NPI:** 1700859592 (Entity type: Individual)
- **Enumerated:** February 10, 2006
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 15804 (Arizona)
- **Sole proprietor:** No
## Practice location
- **Address:** 120 S VAL VISTA DR, Gilbert, AZ 85296-1370
- **Phone:** (480) 733-6500 · **Fax:** (480) 633-3794
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Phoenix Children's Medical Group (NPI 1487814240, Mesa, AZ), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 13, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1700859592) · Data from the CMS NPPES public registry.