DR. JOHN ELLIS D.O.
NPI 1003221037
Emergency Medicine in Bronx, NY
About Dr. John Ellis D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN ELLIS D.O. (NPI 1003221037) is an individual emergency medicine provider in Bronx, New York, licensed in California (22891) and active in the NPI registry since June 2014. He is enrolled in Medicare PECOS, is affiliated with Benefis Hospitals Inc, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
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
Dr. John Ellis D.o. 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
7Medicare enrollment records show John Ellis reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Birmingham, AL 35205
- Reassigned Medicare billing, Florida enrollment
- 802 clinicians in this Medicare group
Winter Haven, FL 33881
- Reassigned Medicare billing, Florida enrollment
- 1,065 clinicians in this Medicare group
Tampa, FL 33607
- Reassigned Medicare billing, Florida enrollment
- 158 clinicians in this Medicare group
Tampa, FL 33607
- Reassigned Medicare billing, Florida enrollment
- 161 clinicians in this Medicare group
Great Falls, MT 59405
- Reassigned Medicare billing, Montana enrollment
- 637 clinicians in this Medicare group
Blythe, CA 92225
- Reassigned Medicare billing, California enrollment
- 2,323 clinicians in this Medicare group
Berkeley, CA 94705
- Reassigned Medicare billing, California enrollment
- 54 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 4
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.
Benefis Hospitals Inc
Acute Care Hospitals · Great Falls, MTPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10457 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 11
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BRONX, NY 10457
BRONX, NY 10457
BRONX, NY 10457
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 John Ellis's NPI number?
The NPI number for John Ellis is 1003221037. It was assigned to this individual provider in the NPPES registry on June 28, 2014.
Where is John Ellis located?
John Ellis practices at 4422 Third Ave, Bronx, NY 10457. The listed phone number is (718) 960-9000.
What is John Ellis's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is John Ellis enrolled in Medicare?
Yes. John Ellis 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 John Ellis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Ellis reassigns Medicare benefits to 7 organizations: Paragon Contracting Services LLC (Birmingham, AL), Paragon Emergency Services LLC (Winter Haven, FL), Observation Medical Group LLC (Tampa, FL), Emergency Medical Associates Of Tampa Bay, LLC (Tampa, FL), Benefis Hospitals, Inc. (Great Falls, MT) and 2 more organizations, listed in the Medicare section above. 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 John Ellis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Ellis accept?
Health plans from Blue Cross and Blue Shield of Montana list John Ellis 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.
Is John Ellis affiliated with any hospitals?
According to CMS data, John Ellis is affiliated with Benefis Hospitals Inc.
When was this NPI record last updated?
The NPPES record for John Ellis was last updated on November 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Dr. John Ellis, D.O. · NPI 1003221037
Emergency Medicine physician in Bronx, New York. Individual provider, active in the CMS NPPES registry since June 28, 2014.
## Identity
- **NPI:** 1003221037 (Entity type: Individual)
- **Enumerated:** June 28, 2014
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 22891 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4422 THIRD AVE, Bronx, NY 10457
- **Phone:** (718) 960-9000
## 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:** 7 organizations under Medicare reassignment (form CMS-855R): Paragon Contracting Services LLC (NPI 1225071459, Birmingham, AL); Paragon Emergency Services LLC (NPI 1912101650, Winter Haven, FL); Observation Medical Group LLC (NPI 1952763682, Tampa, FL); Emergency Medical Associates Of Tampa Bay, LLC (NPI 1023397817, Tampa, FL); Benefis Hospitals, Inc. (NPI 1881650737, Great Falls, MT); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Lake Erie College Of Osteopathic Medicine, Bradenton, class of 2014
## Record status
- **NPPES last updated:** November 24, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1003221037) · Data from the CMS NPPES public registry.