NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Elaine M. Madayag MD, A Professional Corporation

Internal Medicine Physician in Oakdale, CA · enumerated 2015 · authorized official Elaine Madayagcapuno, Owner/Director.

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

National Provider Identifier

1629440508

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Elaine M. Madayag MD, A Professional Corporation
Other name <Unavail>
Practice address 715 W F St, Oakdale, CA, 95361
Phone (209) 847-2920
Fax (209) 847-2892
Enumeration date Oct 30, 2015
Last updated in NPPES Jul 21, 2022

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A63167 (CA) Primary
261QM2500X Medical Specialty Clinic/Center Ambulatory Health Care Facilities · License A63167 (CA) Secondary

Authorized official

Name Elaine Madayagcapuno
Title Owner/Director
Phone (209) 847-2920

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 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.
What type of organization is Elaine M. Madayag MD, A Professional Corporation?
Elaine M. Madayag MD, A Professional Corporation is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.