MRS. ERIN S SIMON AG-ACNP
NPI 1316958176
Nurse Practitioner - Acute Care in Fairfax, VA

Active since August 10, 2006PECOS EnrolledAccepts Medicare Assignment
3580 JOSEPH SIEWICK DR STE 305, FAIRFAX, VA 22033(703) 648-3266(703) 648-3264 Get Directions Write a Review

NPPES record last updated: August 27, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Aug 27, 2021, Oct 29, 2020, Aug 21, 2019 and 3 more (6 updates tracked since 2016).

About Mrs. Erin S Simon Ag-acnp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MRS. ERIN S SIMON AG-ACNP (NPI 1316958176) is an individual acute care provider in Fairfax, Virginia, licensed in Virginia (0024173563) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, is affiliated with Inova Fairfax Hospital, and is a graduate of Other (2015).

NPPES Registry Identity

NPI1316958176
Entity TypeIndividualFemale
Primary Taxonomy363LA2100X
Provider Legal NameMRS. ERIN S SIMONCredential: AG-ACNP
Location Address3580 JOSEPH SIEWICK DR STE 305Fairfax, VA 22033-1764
Mailing Address2901 Telestar Ct., #300Falls Church, VA 22042-1263 · (703) 591-1688 · Fax (703) 591-1445
Fax(703) 648-3264
Sole ProprietorNo
Medical School CMSOtherGraduated 2015
Enumeration DateAugust 10, 2006
Last NPPES UpdateAugust 27, 20216 updates tracked since enumeration
NPPES CertifiedAugust 27, 2021
✔ NPI 1316958176 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Acute CarePhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LA2100X
License✔ Licensed in VA · 0024173563
3580 JOSEPH SIEWICK DR STE 305, Fairfax, VA 22033

Other Identifiers 1

Medicaid1316958176VA

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

Mrs. Erin S Simon Ag-acnp 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.

PECOS PAC ID3476841131
PECOS Enrollment IDI20161012001279, I20170609001661
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Erin Simon reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Urgent Care
100 MAPLE AVE E
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
Cardiovascular Disease
1900 GALLOWS RD STE 110
Vienna, VA 22182
  • Reassigned Medicare billing, District of Columbia and Virginia enrollments
  • 57 clinicians in this Medicare group
Family Medicine
3241 WESTERN BRANCH BLVD
Chesapeake, VA 23321
  • Reassigned Medicare billing, Virginia enrollment
  • 570 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

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Inova Fairfax Hospital

Acute Care Hospitals · Falls Church, VA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490063
Location3300 Gallows RoadFalls Church, VA 22042 · Fairfax County
Emergency services Birthing friendly

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.

New Patient
$100.31 typical visit price
range $65.18 – $194.86
Typical copayment $25.07 (range $16.29 – $48.71)
Most-billed visit code 99203
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 15

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Physician Assistant
3580 JOSEPH SIEWICK DR STE 305
FAIRFAX, VA 22033
Physician Assistant
3580 JOSEPH SIEWICK DR STE 305
FAIRFAX, VA 22033
Nurse Practitioner (Adult Health)
3580 JOSEPH SIEWICK DR STE 305
FAIRFAX, VA 22033
Internal Medicine (Cardiovascular Disease)
3580 JOSEPH SIEWICK DR STE 305
FAIRFAX, VA 22033
Internal Medicine (Cardiovascular Disease)
3580 JOSEPH SIEWICK DR STE 305
FAIRFAX, VA 22033
Nurse Practitioner
3580 JOSEPH SIEWICK DR STE 305
FAIRFAX, VA 22033
Internal Medicine (Cardiovascular Disease)
3580 JOSEPH SIEWICK DR STE 305
FAIRFAX, VA 22033
Internal Medicine (Cardiovascular Disease)
3580 JOSEPH SIEWICK DR STE 305
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 Erin Simon's NPI number?

The NPI number for Erin Simon is 1316958176. It was assigned to this individual provider in the NPPES registry on August 10, 2006.

Where is Erin Simon located?

Erin Simon practices at 3580 Joseph Siewick Dr Ste 305, Fairfax, VA 22033. The listed phone number is (703) 648-3266.

What is Erin Simon's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.

Is Erin Simon enrolled in Medicare?

Yes. Erin Simon 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 Erin Simon's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Erin Simon reassigns Medicare benefits to 3 organizations: Inova Health Care Services (Vienna, VA), The Cardiovascular Group, PC (Vienna, VA) and Bayview Physician Services, PC (Chesapeake, 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 Erin Simon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Erin Simon accept?

Health plans from Oscar Health list Erin Simon 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 Erin Simon affiliated with any hospitals?

According to CMS data, Erin Simon is affiliated with Inova Fairfax Hospital.

When was this NPI record last updated?

The NPPES record for Erin Simon was last updated on August 27, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.