Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Kessler Endocrinology Assoc PC

Q: What type of organization is Kessler Endocrinology Assoc PC?

Kessler Endocrinology Assoc PC is registered in NPPES as a Endocrinology, Diabetes & Metabolism Physician (its primary provider taxonomy).

Endocrinology, Diabetes & Metabolism Physician in Aston, PA · enumerated 2006 · authorized official Rex Kessler, Medical Director.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1659399343

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Registry record

Entity type Organization (Type 2)

Legal business name Kessler Endocrinology Assoc PC

Practice address 2901 Dutton Mill Rd, Ste 110, Aston, PA, 19014

Phone (610) 876-2300

Fax (610) 876-3004

Enumeration date Jul 18, 2006

Last updated in NPPES Oct 3, 2012

Taxonomy & classification

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License MD020904E (PA) Primary

Authorized official

Name Rex Kessler

Title Medical Director

Phone (610) 876-2300

Other identifiers

Identifier	Type	State	Issuer
Z060988000	Other	PA	KEYSTONE HEALTH PLAN EAST
2769330	Other	PA	AETNA
161Z715	Medicaid	PA	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Kessler Endocrinology Assoc PC?

Kessler Endocrinology Assoc PC is registered in NPPES as a Endocrinology, Diabetes & Metabolism Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Providers at this address

Browse all →

Rex Kessler Endocrinology, Diabetes & Metabolism Physician · Aston, PA NPI 1841298023 Regina Ubaldi-Rosen Family Nurse Practitioner · Aston, PA NPI 1073550968 Providence Medical Associates, Inc Internal Medicine Physician · Aston, PA NPI 1376575100 Wallingford Medical Clinic, LLC Internal Medicine Physician · Aston, PA NPI 1548288236 Riddle Endocrinology & Metabolism Associates, PC Endocrinology, Diabetes & Metabolism Physician · Aston, PA NPI 1164659140 Sleep Dentistry Center P.C. General Practice Dentistry · Aston, PA NPI 1154668945 Sleep Dentistry Center Pediatric Dentistry · Aston, PA NPI 1902237126 Robert Kerns Pediatric Dentistry · Aston, PA NPI 1619467685

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-10-03.