Allison Kathleen Sullivan, DMD

Allison Kathleen Sullivan is a General Practice Dentistry provider (Dentist) practicing in Sycamore, IL, registered in the NPPES registry with NPI 1639656788 since 2018. The credential DMD stands for Doctor of Medicine in Dentistry. Practices at Collins Dental Group, P.C. (listed at the same practice address in NPPES).

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NPI	1639656788
Entity type	Individual (Type 1)
Name	Allison Kathleen Sullivan
Credential	DMD
Sex	Female
Practice address	2025 ABERDEEN CT, Sycamore, IL, 60178
Phone	8157583666
Enumeration date	2018-07-22
Last updated in NPPES	2018-07-22

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
1223G0001X	General Practice Dentistry	Primary	019.031739	IL

DMD — Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD credential

Copy-ready billing details

Provider: Allison Sullivan, DMD
NPI: 1639656788
Taxonomy: 1223G0001X (General Practice Dentistry)
Address: 2025 ABERDEEN CT, Sycamore, IL, 60178

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1427169309	Mark Sloan	Individual	General Practice Dentistry	Sycamore, IL
1942420401	Dennis Collins	Individual	General Practice Dentistry	Sycamore, IL
1215157797	Collins Dental Group, P.C.	Organization	General Practice Dentistry	Sycamore, IL
1356551469	Kenneth Trch	Individual	General Practice Dentistry	Sycamore, IL
1538333034	Stephen Woodrick	Individual	Dentist	Sycamore, IL
1689080954	Darrin King	Individual	Dentist	Sycamore, IL
1932692274	Thomas Hensley	Individual	Dentist	Sycamore, IL

Verify this record

Cross-check NPI 1639656788 against the authoritative CMS record: view Allison Kathleen Sullivan 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 Allison Sullivan?

Allison Sullivan is registered in NPPES with the primary taxonomy of General Practice Dentistry. 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 2018-07-22.