Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Douglas Ader, DO, PA-C

Emergency Medicine Physician in West Chester, PA · enumerated 2012.

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

National Provider Identifier

1235486838

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Douglas Ader

Credential DO, PA-C

Sex Male

Practice address 701 E Marshall St, West Chester, PA, 19380

Phone (610) 431-5151

Enumeration date Aug 14, 2012

Last updated in NPPES Jul 4, 2022

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 25MP00289600 (NJ) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License CE-0007077 (DE) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License OS021842 (PA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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

How do I verify Douglas Ader's NPI record?

Cross-check NPI 1235486838 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1235486838 active?

Yes, as of the latest NPPES snapshot, NPI 1235486838 is active (record last updated 2022-07-04).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-04.