Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. H Ray Duncan, DDS

Orthodontics and Dentofacial Orthopedics Dentistry in Aberdeen, SD · enumerated 2007 · practices at H. Ray Duncan, DDS, PC.

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

National Provider Identifier

1750427886

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Registry record

Entity type Individual (Type 1)

Name Dr. H Ray Duncan

Credential DDS

Sex Male

Practice address Aberdeen, SD, 57401

Phone (605) 225-5761

Fax (605) 225-3296

Enumeration date Jan 29, 2007

Last updated in NPPES Aug 10, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1223X0400X Orthodontics and Dentofacial Orthopedics Dentistry Dental Providers · License M354 (SD) Primary

1223X0400X Orthodontics and Dentofacial Orthopedics Dentistry Dental Providers · License 1850 (ND) Secondary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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.

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Frequently asked questions

How do I verify H Duncan's NPI record?

Cross-check NPI 1750427886 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1750427886 active?

Yes, as of the latest NPPES snapshot, NPI 1750427886 is active (record last updated 2007-08-10).

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H. Ray Duncan, DDS, PC Orthodontics and Dentofacial Orthopedics Dentistry · Aberdeen, SD NPI 1699967968

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-08-10.