KRISTY L DIFFLEY NURSE PRACTITIONER
NPI 1154828150
Nurse Practitioner - Family in Manassas, VA
About Kristy L Diffley Nurse Practitioner NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KRISTY L DIFFLEY NURSE PRACTITIONER (NPI 1154828150) is an individual family provider in Manassas, Virginia, licensed in Virginia (0024176464) and active in the NPI registry since April 2018. She is enrolled in Medicare PECOS, is affiliated with Novant Health Uva Health System Culpeper Med Cente, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
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
Kristy L Diffley Nurse Practitioner 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
4Medicare enrollment records show Kristy Diffley reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Manassas, VA 20110
- Reassigned Medicare billing, Virginia enrollment
- 584 clinicians in this Medicare group
Manassas, VA 20109
- Reassigned Medicare billing, District of Columbia enrollment
- 41 clinicians in this Medicare group
Alexandria, VA 22311
- Reassigned Medicare billing, District of Columbia enrollment
- 436 clinicians in this Medicare group
Charlottesville, VA 22911
- Reassigned Medicare billing, Virginia enrollment
- 2,820 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.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Novant Health Uva Health System Culpeper Med Cente
Acute Care Hospitals · Culpeper, VAFauquier Hospital
Acute Care Hospitals · Warrenton, VANovant Prince William Medical Center
Acute Care Hospitals · Manassas, VAUva Health Haymarket Medical Center
Acute Care Hospitals · Haymarket, VAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20110 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 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MANASSAS, VA 20110
MANASSAS, VA 20110
MANASSAS, VA 20110
MANASSAS, VA 20110
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 Kristy Diffley's NPI number?
The NPI number for Kristy Diffley is 1154828150. It was assigned to this individual provider in the NPPES registry on April 7, 2018.
Where is Kristy Diffley located?
Kristy Diffley practices at 8640 Sudley Rd Ste 302, Manassas, VA 20110. The listed phone number is (703) 369-5959.
What is Kristy Diffley's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Kristy Diffley enrolled in Medicare?
Yes. Kristy Diffley 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 Kristy Diffley's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kristy Diffley reassigns Medicare benefits to 4 organizations: Uva Community Health Medical Group, LLC (Manassas, VA), Carient Heart & Vascular, LLC (Manassas, VA), Virginia Hospital Center Physician Group LLC (Alexandria, VA) and University Of Virginia Physicians Group (Charlottesville, VA). 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 Kristy Diffley's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kristy Diffley accept?
Health plans from Oscar Health list Kristy Diffley 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 Kristy Diffley affiliated with any hospitals?
According to CMS data, Kristy Diffley is affiliated with Novant Health Uva Health System Culpeper Med Cente, Fauquier Hospital, Novant Prince William Medical Center and Uva Health Haymarket Medical Center.
When was this NPI record last updated?
The NPPES record for Kristy Diffley was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Kristy L Diffley, NURSE PRACTITIONER · NPI 1154828150
Family physician in Manassas, Virginia. Individual provider, active in the CMS NPPES registry since April 7, 2018.
## Identity
- **NPI:** 1154828150 (Entity type: Individual)
- **Enumerated:** April 7, 2018
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 0024176464 (Virginia)
- **Sole proprietor:** No
## Practice location
- **Address:** 8640 SUDLEY RD STE 302, Manassas, VA 20110-4404
- **Phone:** (703) 369-5959
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Uva Community Health Medical Group, LLC (NPI 1265827513, Manassas, VA); Carient Heart & Vascular, LLC (NPI 1669982526, Manassas, VA); Virginia Hospital Center Physician Group LLC (NPI 1003228917, Alexandria, VA); University Of Virginia Physicians Group (NPI 1033138250, Charlottesville, VA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** September 11, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1154828150) · Data from the CMS NPPES public registry.