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MARGUERITE RAO DILLAWAY M.D.
NPI 1821059072
Pediatrics - Adolescent Medicine in Hamden, CT

Active since March 29, 2006PECOS Enrolled
2200 WHITNEY AVE, SUITE 240, HAMDEN, CT 06518(203) 287-5400(203) 281-3001 Get Directions Write a Review

NPPES record last updated: November 25, 2015. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Marguerite Rao Dillaway M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARGUERITE RAO DILLAWAY M.D. (NPI 1821059072) is an individual adolescent medicine provider in Hamden, Connecticut, licensed in Connecticut (026292) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1821059072
Entity TypeIndividualFemale
Primary Taxonomy2080A0000X
Provider Legal NameMARGUERITE RAO DILLAWAYCredential: M.D.
Location Address2200 WHITNEY AVE, SUITE 240Hamden, CT 06518-3691
Mailing Address2200 Whitney Ave, Suite 240Hamden, CT 06518-3691 · (203) 287-5400 · Fax (203) 281-3001
Phone(203) 287-5400
Fax(203) 281-3001
Sole ProprietorNo
Enumeration DateMarch 29, 2006
Last NPPES UpdateNovember 25, 2015
✔ NPI 1821059072 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Adolescent MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080A0000X
License✔ Licensed in CT · 026292
Definition
A pediatrician who specializes in adolescent medicine is a multi-disciplinary healthcare specialist trained in the unique physical, psychological and social characteristics of adolescents, their healthcare problems and needs.
2200 WHITNEY AVE, Hamden, CT 06518
Open in Google Maps ↗

Other Identifiers 7

Other0Q1595CT · Healthnet
OtherNHP224CT · Oxford
Other726292CT · Connecticare
Medicaid001262922CT
Other1249063CT · United Healthcare
Other010026292201CT02CT · Anthem
Medicare UPINE46318CT

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marguerite Rao Dillaway M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Marguerite Rao Dillaway reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mill Hill Medical Consultants Inc
5.2 mi
Hospitalist
20 YORK ST, CB 2041
New Haven, CT 06510
  • Reassigned Medicare billing, Connecticut enrollment
  • Medicare enrollment name: Northeast Medical Group Inc
  • 1,824 clinicians in this Medicare group
NPI 1952624769 (203) 688-4741

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

RICARDO F CORDIDO MD
Internal Medicine (Cardiovascular Disease)
2200 WHITNEY AVE, SUITE 180
HAMDEN, CT 06518
South Central Connecticut Planning Region (203) 407-2500
JENNIFER SU THOMPSON MD
Internal Medicine (Gastroenterology)
2200 WHITNEY AVE, SUITE 360
HAMDEN, CT 06518
South Central Connecticut Planning Region (203) 281-4463
MR. MARIAN E VULPE MD
Internal Medicine (Cardiovascular Disease)
2200 WHITNEY AVE, STE 180
HAMDEN, CT 06518
South Central Connecticut Planning Region (203) 407-2500
GASTROENTEROLOGY CENTER OF CONNECTICUT, PC
Internal Medicine (Gastroenterology)
2200 WHITNEY AVE, SUITE 360
HAMDEN, CT 06518
South Central Connecticut Planning Region (203) 281-4463
LYNDA A. ROMITA CPNP
Nurse Practitioner (Pediatrics)
2200 WHITNEY AVE, SUITE 240
HAMDEN, CT 06518
South Central Connecticut Planning Region (203) 287-5400
CHRISTINE SALAMIDA
Nurse Practitioner (Family)
2200 WHITNEY AVE, SUITE 360
HAMDEN, CT 06518
South Central Connecticut Planning Region (203) 281-4463
DR. MARK JEFFREY SCHPERO D.D.S.
Dentist (Orthodontics and Dentofacial Orthopedics)
2200 WHITNEY AVE, SUITE 250
HAMDEN, CT 06518
South Central Connecticut Planning Region (203) 288-7273
SAMANTHA RADIN RD, CD-N
Dietitian, Registered
2200 WHITNEY AVE, SUITE 180
HAMDEN, CT 06518
South Central Connecticut Planning Region (203) 407-2500

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marguerite Rao Dillaway's NPI number?

The NPI number for Marguerite Rao Dillaway is 1821059072. It was assigned to this individual provider in the NPPES registry on March 29, 2006.

Where is Marguerite Rao Dillaway located?

Marguerite Rao Dillaway practices at 2200 Whitney Ave Suite 240, Hamden, CT 06518. The listed phone number is (203) 287-5400.

What is Marguerite Rao Dillaway's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Adolescent Medicine, with taxonomy code 2080A0000X.

Is Marguerite Rao Dillaway enrolled in Medicare?

Yes. Marguerite Rao Dillaway is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Marguerite Rao Dillaway's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marguerite Rao Dillaway reassigns Medicare benefits to Mill Hill Medical Consultants Inc (New Haven, CT). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marguerite Rao Dillaway's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Marguerite Rao Dillaway was last updated on November 25, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.