Dr. Theodore John Constantine, DDS

Dr. Theodore John Constantine is a Dentist provider (Dentist) practicing in Northbrook, IL, registered in the NPPES registry with NPI 1982753182 since 2007. The credential DDS stands for Doctor of Dental Surgery.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1982753182
Entity type	Individual (Type 1)
Name	Dr. Theodore John Constantine
Credential	DDS
Sex	Male
Practice address	Northbrook, IL, 60062
Phone	8472726466
Fax	8472721487
Enumeration date	2007-01-09
Last updated in NPPES	2014-12-18

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

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
122300000X	Dentist	Primary	019021638	IL

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

Copy-ready billing details

Provider: Theodore Constantine, DDS
NPI: 1982753182
Taxonomy: 122300000X (Dentist)
Address: Northbrook, IL, 60062

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1508696477	Jonathan Constantine	Individual	Dentist	Northbrook, IL

Verify this record

Cross-check NPI 1982753182 against the authoritative CMS record: view Dr. Theodore John Constantine on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

What specialty is Theodore Constantine?

Theodore Constantine is registered in NPPES with the primary taxonomy of Dentist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2014-12-18.