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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

RILEY ELIZABETH WILLIAMS PA-C
NPI 1013828250
Physician Assistant in New Haven, CT

Active since September 16, 2026
20 YORK ST, NEW HAVEN, CT 06510(203) 688-4242 Get Directions Write a Review

NPPES record added: September 16, 2026. Verified against the NPPES registry weekly; last sync: September 20, 2026.

About Riley Elizabeth Williams Pa-c NPPES

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

RILEY ELIZABETH WILLIAMS PA-C (NPI 1013828250) is an individual physician assistant in New Haven, Connecticut and active in the NPI registry since September 2026.

NPPES Registry Identity

NPI1013828250
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameRILEY ELIZABETH WILLIAMSCredential: PA-C
Location Address20 YORK STNew Haven, CT 06510-3202
Mailing Address380 Mather St Apt 2104Hamden, CT 06514-3155 · (203) 434-6305
Phone(203) 688-4242
Sole ProprietorNo
Enumeration DateSeptember 16, 2026
NPPES CertifiedSeptember 16, 2026
✔ NPI 1013828250 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
20 YORK ST, New Haven, CT 06510
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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.

AUDREY P SENIOR APRN
Nurse Practitioner (Family)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-5860
DR. YEISID F FIGUEREDO M.D.
Pediatrics (Neonatal-Perinatal Medicine)
20 YORK ST, DEPT OF NEONATOLOGY
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-2320
YALE NEW HAVEN HOSPITAL
Durable Medical Equipment & Medical Supplies (Customized Equipment)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-2046
TAYLOR KINGSTON
Dietitian, Registered
20 YORK ST, FOOD AND NUTRITION EPB806
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-9185
DR. TRAVIS DANIEL BONTRAGER MD
Hospitalist
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-1734
TERESA JOSEPH D.O.
Internal Medicine (Nephrology)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 737-8894
MR. BRAD ST. MARTIN MD
Obstetrics & Gynecology
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-4242
BERNADETTE BIMONTE-HACKETT LCSW
Social Worker (Clinical)
20 YORK ST, SOCIAL WORK EP10-635
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 785-5161

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 Riley Williams's NPI number?

The NPI number for Riley Williams is 1013828250. It was assigned to this individual provider in the NPPES registry on September 16, 2026.

Where is Riley Williams located?

Riley Williams practices at 20 York St, New Haven, CT 06510. The listed phone number is (203) 688-4242.

What is Riley Williams's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

When was this NPI record last updated?

The NPPES record for Riley Williams was last updated on September 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 days 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.