Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Patrick William Zimmerman, D.O.

Trauma Surgery Physician in Danbury, CT · enumerated 2015 · practices at Total Renal Care Inc.

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

National Provider Identifier

1740674662

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Registry record

Entity type Individual (Type 1)

Name Dr. Patrick William Zimmerman

Credential D.O.

Sex Male

Practice address 111 Osborne St, Danbury, CT, 06810

Phone (203) 739-7131

Fax (203) 739-1554

Enumeration date Mar 28, 2015

Last updated in NPPES Feb 24, 2025

Taxonomy & licenses

2086S0102X Surgical Critical Care Physician Allopathic & Osteopathic Physicians · License 71913 (CT) Secondary

2086S0127X Trauma Surgery Physician Allopathic & Osteopathic Physicians · License 71913 (CT) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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 specialty is Patrick Zimmerman?

Patrick Zimmerman is registered in NPPES with the primary taxonomy of Trauma Surgery Physician. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-24.