DR. JOHN RYAN JONES MD
NPI 1144206855
Emergency Medicine in Fairfax, VA
About Dr. John Ryan Jones Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN RYAN JONES MD (NPI 1144206855) is an individual emergency medicine provider in Fairfax, Virginia, licensed in Virginia (0101230252) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS and maintains a secondary practice location in Rockville.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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 (PECOS)
Dr. John Ryan Jones Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show John Jones reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fairfax, VA 22033
- Reassigned Medicare billing, District of Columbia enrollment
- 71 clinicians in this Medicare group
Vienna, VA 22180
- Reassigned Medicare billing, Virginia and District of Columbia enrollments
- Also billed through NPI 1669511051 (District of Columbia)
- 2,379 clinicians in this Medicare group
Warrenton, VA 20186
- Reassigned Medicare billing, Virginia enrollment
- 60 clinicians in this Medicare group
Sioux City, IA 51104
- Reassigned Medicare billing, Iowa enrollment
- 281 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 3
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 22033 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
FAIRFAX, VA 22033
FAIRFAX, VA 22033
FAIRFAX, VA 22033
FAIRFAX, VA 22033
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 Jones's NPI number?
The NPI number for John Jones is 1144206855. It was assigned to this individual provider in the NPPES registry on December 15, 2005.
Where is John Jones located?
John Jones practices at 3600 Joseph Siewick Dr, Fairfax, VA 22033. The listed phone number is (703) 391-3996.
What is John Jones's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is John Jones enrolled in Medicare?
Yes. John Jones is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for John Jones's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Jones reassigns Medicare benefits to 4 organizations: Fair Oaks Emergency Physicians, PLLC (Fairfax, VA), Inova Health Care Services (Vienna, VA), Virginia Emergency Medicine Assoicates, Ltd (Warrenton, VA) and Northwest Iowa Hospital Corporation (Sioux City, IA). 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 Jones's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Jones accept?
Health plans from Wellmark Health Plan of Iowa, Inc. list John Jones 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 John Jones was last updated on March 28, 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.
# Dr. John Ryan Jones, MD · NPI 1144206855
Emergency Medicine physician in Fairfax, Virginia. Individual provider, active in the CMS NPPES registry since December 15, 2005.
## Identity
- **NPI:** 1144206855 (Entity type: Individual)
- **Enumerated:** December 15, 2005
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 0101230252 (Virginia)
- **Sole proprietor:** No
## Practice location
- **Address:** 3600 JOSEPH SIEWICK DR, Fairfax, VA 22033
- **Phone:** (703) 391-3996
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Fair Oaks Emergency Physicians, PLLC (NPI 1649203605, Fairfax, VA); Inova Health Care Services (NPI 1275886418, Vienna, VA); Virginia Emergency Medicine Assoicates, Ltd (NPI 1700988664, Warrenton, VA); Northwest Iowa Hospital Corporation (NPI 1215962550, Sioux City, IA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 28, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1144206855) · Data from the CMS NPPES public registry.