1. Home
  2. Directory
  3. Virginia
  4. Sterling
  5. Nurse Practitioner
  6. NPI Profile

MR. MARK ANTHONY PARKER PMHNP-BC
NPI 1710214721
Nurse Practitioner - Psychiatric/Mental Health in Sterling, VA

Active since November 11, 2009PECOS EnrolledAccepts Medicare Assignment
22611 MARKEY CT STE 114-I, STERLING, VA 20166(703) 249-4828(703) 281-6888 Get Directions Write a Review

NPPES record last updated: August 25, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 25, 2026, Nov 16, 2023, Feb 22, 2023 (3 updates tracked since 2023).

About Mr. Mark Anthony Parker Pmhnp-bc NPPES

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

MR. MARK ANTHONY PARKER PMHNP-BC (NPI 1710214721) is an individual psychiatric/mental health provider in Sterling, Virginia, licensed in Virginia (0024186581) and active in the NPI registry since November 2009. He is enrolled in Medicare PECOS and is a graduate of Other (2022).

NPPES Registry Identity

NPI1710214721
Entity TypeIndividualMale
Primary Taxonomy363LP0808X
Provider Legal NameMR. MARK ANTHONY PARKERCredential: PMHNP-BC
Location Address22611 MARKEY CT STE 114-ISterling, VA 20166-6931
Mailing Address224d Cornwall St Nw Ste 403Leesburg, VA 20176-2704 · (703) 737-6010
Phone(703) 249-4828
Fax(703) 281-6888
Sole ProprietorNo
Medical School CMSOtherGraduated 2022
Enumeration DateNovember 11, 2009
Last NPPES UpdateAugust 25, 20263 updates tracked since enumeration
NPPES CertifiedAugust 25, 2026
✔ NPI 1710214721 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in VA · 0024186581
22611 MARKEY CT STE 114-I, Sterling, VA 20166
Open in Google Maps ↗

Other Identifiers 2

Medicaid1710214721VA
Medicaid30018242720002VA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.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

Mr. Mark Anthony Parker Pmhnp-bc 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 ID6406354745
PECOS Enrollment IDI20250807001565
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

2

Medicare enrollment records show Mark Parker reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Loudoun Psychiatry Group LLC
Same address
Mental Health (Including Community Mental Health Center)
22611 MARKEY CT STE 114
Sterling, VA 20166
  • Reassigned Medicare billing, Virginia enrollment
NPI 1740974914 (703) 249-4828
Loudoun Medical Group, PC
3.7 mi
Obstetrics & Gynecology
21475 RIDGETOP CIRCLE, SUITE 210
Sterling, VA 20166
  • Reassigned Medicare billing, Virginia enrollment
  • 291 clinicians in this Medicare group
NPI 1518081033 (703) 858-2811

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20166 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
$86.88 typical visit price
range $56.19 – $170.30
Typical copayment $21.72 (range $14.04 – $42.57)
Most-billed visit code 99203
Established Patient
$99.13 typical visit price
range $18.07 – $138.91
Typical copayment $24.78 (range $4.51 – $34.72)
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

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

LOUDOUN MEDICAL GROUP, PC
Psychologist
22611 MARKEY CT STE 114-I
STERLING, VA 20166
Loudoun County (703) 249-4828

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 Mark Parker's NPI number?

The NPI number for Mark Parker is 1710214721. It was assigned to this individual provider in the NPPES registry on November 11, 2009.

Where is Mark Parker located?

Mark Parker practices at 22611 Markey Ct Ste 114-I, Sterling, VA 20166. The listed phone number is (703) 249-4828.

What is Mark Parker's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Is Mark Parker enrolled in Medicare?

Yes. Mark Parker 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 Mark Parker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Parker reassigns Medicare benefits to 2 organizations: Loudoun Psychiatry Group LLC (Sterling, VA) and Loudoun Medical Group, PC (Sterling, 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 Mark Parker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Parker accept?

Health plans from Oscar Health list Mark Parker 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 Mark Parker was last updated on August 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.