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

NATHAN KLAES PA-C
NPI 1174455778
Physician Assistant in New Haven, CT

Active since May 30, 2026
20 YORK ST, NEW HAVEN, CT 06510(203) 688-4242 Get Directions Write a Review

NPPES record added: May 30, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Nathan Klaes Pa-c NPPES

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

NATHAN KLAES PA-C (NPI 1174455778) is an individual physician assistant in New Haven, Connecticut and active in the NPI registry since May 2026.

NPPES Registry Identity

NPI1174455778
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameNATHAN KLAESCredential: PA-C
Location Address20 YORK STNew Haven, CT 06510-3220
Mailing Address2001 Main StBuffalo, NY 14208-1035
Phone(203) 688-4242
Sole ProprietorNo
Enumeration DateMay 30, 2026
NPPES CertifiedMay 30, 2026
✔ NPI 1174455778 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
NEEHARIKA THOTTEMPUDI MBBS
Psychiatry & Neurology (Neurology)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-4242
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

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 Nathan Klaes's NPI number?

The NPI number for Nathan Klaes is 1174455778. It was assigned to this individual provider in the NPPES registry on May 30, 2026.

Where is Nathan Klaes located?

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

What is Nathan Klaes'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 Nathan Klaes was last updated on May 30, 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.