DR. SYDNEY LOUISE MILLS PSY.D.
NPI 1023728276
Psychologist - Clinical in Fairfax, VA

Q: What is Sydney Mills's NPI number?

The NPI number for Sydney Mills is 1023728276. It was assigned to this individual provider in the NPPES registry on November 29, 2022.

Q: What is Sydney Mills's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Q: Is Sydney Mills enrolled in Medicare?

No. Sydney Mills has opted out of Medicare through October 17, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

Q: When was this NPI record last updated?

The NPPES record for Sydney Mills was last updated on March 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.

Active since November 29, 2022Opted out of Medicare · through Oct 17, 2027

11350 RANDOM HILLS RD STE 310, FAIRFAX, VA 22030(703) 865-4900 Get Directions Write a Review

NPPES record last updated: March 18, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 18, 2026, Dec 1, 2022 (2 updates tracked since 2022).

On this page

About Dr. Sydney Louise Mills Psy.d. NPPES

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

DR. SYDNEY LOUISE MILLS PSY.D. (NPI 1023728276) is an individual clinical provider in Fairfax, Virginia, licensed in Virginia (0810008021) and active in the NPI registry since November 2022. She has opted out of Medicare through October 17, 2027.

NPPES Registry Identity

NPI1023728276

Entity TypeIndividualFemale

Primary Taxonomy103TC0700X

Provider Legal NameDR. SYDNEY LOUISE MILLSCredential: PSY.D.

Location Address11350 RANDOM HILLS RD STE 310Fairfax, VA 22030-6044

Mailing Address11350 Random Hills Rd Ste 310Fairfax, VA 22030-6044 · (703) 865-4900

Phone(703) 865-4900

Sole ProprietorYes

Enumeration DateNovember 29, 2022

Last NPPES UpdateMarch 18, 20262 updates tracked since enumeration

NPPES CertifiedMarch 18, 2026

✔ NPI 1023728276 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code103TC0700X

License✔ Licensed in VA · 0810008021

Definition

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

11350 RANDOM HILLS RD STE 310, Fairfax, VA 22030

Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Sydney Louise Mills Psy.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from October 17, 2025 through October 17, 2027.

Opt-Out Effective DateOctober 17, 2025

Opt-Out In Effect ThroughOctober 17, 2027Opt-out affidavits renew automatically every two years unless cancelled

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.

ARIELLA LIBICKI

Psychologist