Dr. Robert Joseph Marsillo, D.C.

Dr. Robert Joseph Marsillo is a Chiropractor provider (Chiropractor) practicing in Darien, CT, registered in the NPPES registry with NPI 1639132210 since 2006. The credential DC stands for Doctor of Chiropractic.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1639132210
Entity type	Individual (Type 1)
Name	Dr. Robert Joseph Marsillo
Credential	D.C.
Sex	Male
Practice address	Darien, CT, 06820
Phone	2036562044
Fax	2036562042
Enumeration date	2006-04-06
Last updated in NPPES	2018-08-17

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

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
111N00000X	Chiropractor	Primary	634	CT

DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Other identifiers

Identifier	Type	State	Issuer
050000634CT01	Other	CT	BC/BS
P463905	Other	CT	OXFORD
4334475	Other	CT	AETNA

Copy-ready billing details

Provider: Robert Marsillo, D.C.
NPI: 1639132210
Taxonomy: 111N00000X (Chiropractor)
Address: Darien, CT, 06820

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1952443129	Darien Immediate Medical Care LLC	Organization	Urgent Care Clinic/Center	Darien, CT
1740312578	Saul Asken M.D. L.L.C.	Organization	Plastic and Reconstructive Surgery Physician	Darien, CT

Verify this record

Cross-check NPI 1639132210 against the authoritative CMS record: view Dr. Robert Joseph Marsillo 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

What is the NPI number for Robert Marsillo?

The National Provider Identifier (NPI) for Robert Marsillo is 1639132210, a Type 1 (individual) record in the CMS NPPES registry.

Where does Robert Marsillo practice?

The practice location on file with NPPES is in Darien, CT. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2018-08-17.