Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Jonathan D Sierk, DDS, PC

Pediatric Dentistry in Castle Pines, CO · enumerated 2021 · authorized official Jonathan Sierk, Dentist/Owner.

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

National Provider Identifier

1558944884

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Registry record

Entity type Organization (Type 2)

Legal business name Jonathan D Sierk, DDS, PC

Practice address 361 Village Square Ln Ste 100, Castle Pines, CO, 80108

Phone (303) 865-4066

Fax (303) 865-4067

Enumeration date May 4, 2021

Last updated in NPPES May 4, 2021

Taxonomy & classification

1223P0221X Pediatric Dentistry Dental Providers Primary

Authorized official

Name Jonathan Sierk

Title Dentist/Owner

Phone (303) 865-4066

Other identifiers

Identifier	Type	State	Issuer
8670	Other	CO	COLORADO DENTAL LICENSE

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 → Validate an NPI →

Frequently asked questions

Where is Jonathan D Sierk, DDS, PC located?

The practice location on file with NPPES is in Castle Pines, CO.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2021-05-04. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Brandon Linn Orthodontics, PC Orthodontics and Dentofacial Orthopedics Dentistry · Castle Pines, CO NPI 1568286466

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-05-04.