Donald S. Bialos, M.D.

Donald S. Bialos, M.D. is a healthcare organization registered as Adult Mental Health Clinic/Center in Madison, CT, holding Type 2 (organization) NPI 1154500692 since 2007. The authorized official on file is Donald Bialos, President.

✓ Active NPI ✓ Valid NPI checksum

NPI	1154500692
Entity type	Organization (Type 2)
Legal business name	Donald S. Bialos, M.D.
Practice address	4 SAMSON ROCK DR, Madison, CT, 06443
Phone	2032457721
Enumeration date	2007-11-01
Last updated in NPPES	2007-11-01

Authorized official

Name	Donald Bialos
Title	President
Phone	2032457721

Taxonomy & classification

Taxonomy code	Specialty	Primary	License	State
261QM0850X	Adult Mental Health Clinic/Center	Primary	013127	CT

Copy-ready billing details

Provider: Donald S. Bialos, M.D.
NPI: 1154500692
Taxonomy: 261QM0850X (Adult Mental Health Clinic/Center)
Address: 4 SAMSON ROCK DR, Madison, CT, 06443

Verify this record

Cross-check NPI 1154500692 against the authoritative CMS record: view Donald S. Bialos, M.D. 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

Where is Donald S. Bialos, M.D. located?

The practice location on file with NPPES is in Madison, CT.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2007-11-01. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-11-01.