Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Douglas Aaron Rex, D.O.,
Surgery Physician in Marion, IN · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1912185661
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Registry record
Entity type Individual (Type 1)
Name Dr. Douglas Aaron Rex
Credential D.O.,
Sex Male
Practice address 330 N Wabash Ave, Ste G370, Marion, IN, 46952
Phone (765) 660-7500
Fax (765) 662-3411
Enumeration date Feb 5, 2008
Last updated in NPPES Oct 20, 2020
Taxonomy & licenses
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
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 000000611209 | Other | IN | ANTHEM |
| 200916470 | Medicaid | IN | - |
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.
Frequently asked questions
Is NPI 1912185661 active?
Yes, as of the latest NPPES snapshot, NPI 1912185661 is active (record last updated 2020-10-20).
How do I verify Douglas Rex's NPI record?
Cross-check NPI 1912185661 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-20.