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Douglas B Aach, MD

Surgery Physician in Shiloh, IL · enumerated 2006.

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

National Provider Identifier

1508817040

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Registry record

Entity type Individual (Type 1)
Name Douglas B Aach
Credential MD
Sex Male
Practice address 1414 Cross Street, Suite 330, Shiloh, IL, 62269
Phone (618) 277-7400
Fax (618) 277-7422
Enumeration date May 12, 2006
Last updated in NPPES Mar 20, 2024

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 036082445 (IL) Primary
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
036082445 Medicaid IL —

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.

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Frequently asked questions

How do I verify Douglas Aach's NPI record?
Cross-check NPI 1508817040 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1508817040 active?
Yes — as of the latest NPPES snapshot, NPI 1508817040 is active (record last updated 2024-03-20).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-03-20.