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DR. MARCELYN CAROL MOLLOY MD
NPI 1053301358
Internal Medicine in Greenwich, CT

Active since October 27, 2005PECOS Enrolled
75 HOLLY HILL LN, GREENWICH, CT 06830(203) 869-6960(203) 869-5103 Get Directions Write a Review

NPPES record last updated: July 18, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Marcelyn Carol Molloy Md NPPES

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

DR. MARCELYN CAROL MOLLOY MD (NPI 1053301358) is an individual internal medicine provider in Greenwich, Connecticut, licensed in Connecticut (052486) and active in the NPI registry since October 2005. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1053301358
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. MARCELYN CAROL MOLLOYCredential: MD
Location Address75 HOLLY HILL LNGreenwich, CT 06830-6098
Mailing Address75 Holly Hill LnGreenwich, CT 06830-6098 · (203) 869-6960 · Fax (203) 869-5103
Phone(203) 869-6960
Fax(203) 869-5103
Sole ProprietorNo
Enumeration DateOctober 27, 2005
Last NPPES UpdateJuly 18, 2014
✔ NPI 1053301358 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CT · 052486
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
75 HOLLY HILL LN, Greenwich, CT 06830
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Marcelyn Carol Molloy Md 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 Reassignments

2

Medicare enrollment records show Marcelyn Molloy reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Optimus Health Care Inc
6.1 mi
Federally Qualified Health Center (FQHC)
597 PACIFIC ST
Stamford, CT 06902
  • Reassigned Medicare billing, Connecticut enrollment
  • 132 clinicians in this Medicare group
NPI 1780944736 (203) 348-2792
Norwalk Community Health Center Inc
13 mi
Health Service
120 CONNECTICUT AVENUE
Norwalk, CT 06854
  • Reassigned Medicare billing, Connecticut enrollment
  • 60 clinicians in this Medicare group
NPI 1841226347 (203) 899-1770

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06830 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

DR. NICHOLAS HARRISON BROWNING M.D.
Internal Medicine
75 HOLLY HILL LN
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3400
HARBOR POINT DENTAL AT GREENWICH PC
Dentist (General Practice)
75 HOLLY HILL LN
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 548-0826
BRIAN ROBERTS
Physical Therapist
75 HOLLY HILL LN
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 276-8526
GREENWICH NEUROSURGERY, P.C.
Neurological Surgery
75 HOLLY HILL LN
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 661-3333
MELISSA GIBLIN PA-C
Physician Assistant
75 HOLLY HILL LN
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 717-1760
NICHOLE S FERREIRA APRN
Nurse Practitioner (Primary Care)
75 HOLLY HILL LN
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 869-6960
RUTH SANDRA THEAMAN LCSW-R
Social Worker (Clinical)
75 HOLLY HILL LN
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 457-3669
STEVEN BENNETT
Counselor (Professional)
75 HOLLY HILL LN
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 489-0888

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 Marcelyn Molloy's NPI number?

The NPI number for Marcelyn Molloy is 1053301358. It was assigned to this individual provider in the NPPES registry on October 27, 2005.

Where is Marcelyn Molloy located?

Marcelyn Molloy practices at 75 Holly Hill Ln, Greenwich, CT 06830. The listed phone number is (203) 869-6960.

What is Marcelyn Molloy's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Marcelyn Molloy enrolled in Medicare?

Yes. Marcelyn Molloy is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Marcelyn Molloy's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marcelyn Molloy reassigns Medicare benefits to 2 organizations: Optimus Health Care Inc (Stamford, CT) and Norwalk Community Health Center Inc (Norwalk, CT). Each 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 Marcelyn Molloy'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 Marcelyn Molloy was last updated on July 18, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.