What is Robert Marsillo's NPI number?

Robert Marsillo's National Provider Identifier (NPI) is 1639132210, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Robert Marsillo's specialty?

Robert Marsillo is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).

Where is Robert Marsillo located?

Robert Marsillo's practice location on file with NPPES is 484 Post Rd, Darien, CT 06820.

What is Robert Marsillo's phone number?

The practice phone number listed in the NPPES registry for Robert Marsillo is (203) 656-2044.

Does Robert Marsillo accept Medicare?

Robert Marsillo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Robert Marsillo's NPI active?

Yes — Robert Marsillo's NPI (1639132210) is active in the NPPES registry as of the last update on 2018-08-17.

IndividualActiveAccepts Medicare

Robert Marsillo, D.C.

NPI 1639132210 · Chiropractor · Darien, CT

Robert Marsillo, D.C. is a Chiropractor provider in Darien, CT (NPI 1639132210).

Provider details

NPI number: 1639132210
Entity type: Individual
Primary specialty: ChiropractorChiropractic Providers
Credential: D.C.
Sex: Male
Sole proprietor: Yes
License: 634 (CT)

Practice location

484 Post Rd

Darien, CT 06820

Phone: (203) 656-2044

Fax: (203) 656-2042

Street-level locationGet directions

More CT providers

Mailing address

433 Post Rd

Darien, CT 06820-3606

Specialties & taxonomies

ChiropractorPrimary111N00000XLicense 634 (CT)
Chiropractic Providers

Enrolled with Medicare as Practitioner - Chiropractic · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Established profile(68/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure28% of score
20 yrs in NPPES registry
Profile completeness28% of score
100% of core fields populated
Practice footprint17% of score
1 documented practice location
Medicare service volume (vs. specialty peers)28% of score
104 Medicare services, 2024 (ranked within specialty)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Chiropractic Manipulative Treatment, 1-2 Spinal Regions98940	104	$27

Typical Medicare-allowed amounts for these services range $27–$27 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.

Enumerated: 2006-04-06
Last updated: 2018-08-17

Frequently asked questions

What is Robert Marsillo's NPI number?: Robert Marsillo's National Provider Identifier (NPI) is 1639132210, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Robert Marsillo's specialty?: Robert Marsillo is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).
Where is Robert Marsillo located?: Robert Marsillo's practice location on file with NPPES is 484 Post Rd, Darien, CT 06820.
What is Robert Marsillo's phone number?: The practice phone number listed in the NPPES registry for Robert Marsillo is (203) 656-2044.
Does Robert Marsillo accept Medicare?: Robert Marsillo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Robert Marsillo's NPI active?: Yes — Robert Marsillo's NPI (1639132210) is active in the NPPES registry as of the last update on 2018-08-17.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

What this provider does (Medicare)

Registry dates

Frequently asked questions

Specialties & taxonomies

Frequently asked questions

Profile Score

What this provider does (Medicare)