Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Observation Physicians of Tidewater

Q: What is the NPI number for Observation Physicians of Tidewater?

The NPI for Observation Physicians of Tidewater is 1306590450, a Type 2 (organization) record in the CMS NPPES registry.

Hospitalist Physician in Norfolk, VA · enumerated 2022 · authorized official Theodore Tzavaras, Ao.

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

National Provider Identifier

1306590450

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Registry record

Entity type Organization (Type 2)

Legal business name Observation Physicians of Tidewater

Parent organization Emergency Physicians of Tidewater

Practice address 830 Kempsville Rd, Norfolk, VA, 23502

Phone (757) 261-6000

Enumeration date Feb 8, 2022

Last updated in NPPES Sep 26, 2025

Taxonomy & classification

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Theodore Tzavaras

Title Ao

Phone (757) 467-4200

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

What is the NPI number for Observation Physicians of Tidewater?

The NPI for Observation Physicians of Tidewater is 1306590450, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Observation Physicians of Tidewater?

NPPES lists Theodore Tzavaras (Ao) as the authorized official for this organization.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-26.