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

Mr. Frederick R. Tiencken, RPA-C

Medical Physician Assistant in Ridgewood, NJ · enumerated 2010 · practices at Neurosurgical Associates of New Jersey, P.C..

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

National Provider Identifier

1396053617

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mr. Frederick R. Tiencken

Credential RPA-C

Sex Male

Practice address Ridgewood, NJ, 07450

Phone (201) 327-8600

Fax (201) 327-8225

Enumeration date Sep 21, 2010

Last updated in NPPES Aug 21, 2025

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

Taxonomy & licenses

363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 014271 (NY) Secondary

363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 25MP00264400 (NJ) Primary

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

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.

What specialty is Frederick Tiencken?

Frederick Tiencken is registered in NPPES with the primary taxonomy of Medical Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-21.