MR. GREGORY J ARNOLD M.D.
NPI 1235322363
Anesthesiology in Dekalb, IL
About Mr. Gregory J Arnold M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. GREGORY J ARNOLD M.D. (NPI 1235322363) is an individual anesthesiology provider in Dekalb, Illinois, licensed in Illinois (036-114478) and active in the NPI registry since August 2007. He is enrolled in Medicare PECOS, is affiliated with Northwestern Medicine Kishwaukee Hospital, and is a graduate of New York Medical College (2002).
NPPES Registry Identity
Specialties & Licenses 3
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
Mr. Gregory J Arnold 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
2Medicare enrollment records show Gregory Arnold reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Dekalb, IL 60115
- Reassigned Medicare billing, Illinois enrollment
- 57 clinicians in this Medicare group
Carol Stream, IL 60122
- Reassigned Medicare billing, Illinois enrollment
- 4,817 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.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Northwestern Medicine Kishwaukee Hospital
Acute Care Hospitals · Dekalb, ILOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DEKALB, IL 60115
DEKALB, IL 60115
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 Gregory Arnold's NPI number?
The NPI number for Gregory Arnold is 1235322363. It was assigned to this individual provider in the NPPES registry on August 22, 2007.
Where is Gregory Arnold located?
Gregory Arnold practices at 1 Kish Hospital Dr, Dekalb, IL 60115. The listed phone number is (630) 936-4029.
What is Gregory Arnold's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Gregory Arnold enrolled in Medicare?
Yes. Gregory Arnold 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 Gregory Arnold's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Arnold reassigns Medicare benefits to 2 organizations: Valley Pain Care Centers Ltd (Dekalb, IL) and Northwestern Medical Faculty Foundation (Carol Stream, IL). 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 Gregory Arnold's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Gregory Arnold affiliated with any hospitals?
According to CMS data, Gregory Arnold is affiliated with Northwestern Medicine Kishwaukee Hospital.
When was this NPI record last updated?
The NPPES record for Gregory Arnold was last updated on July 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.