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DR. MICHELLE SIEGEL MARRINAN MD
NPI 1598761629
Otolaryngology - Otology & Neurotology in Greenwich, CT

Active since June 23, 2005PECOS EnrolledAccepts Medicare Assignment
49 LAKE AVE, GREENWICH, CT 06830(203) 869-2030(203) 869-9262 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Michelle Siegel Marrinan Md NPPES

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

DR. MICHELLE SIEGEL MARRINAN MD (NPI 1598761629) is an individual otology & neurotology provider in Greenwich, Connecticut, licensed in Connecticut (042226) and active in the NPI registry since June 2005. She is enrolled in Medicare PECOS and is a graduate of Albert Einstein College Of Medicine Of Yeshiva University (1997).

NPPES Registry Identity

NPI1598761629
Entity TypeIndividualFemale
Primary Taxonomy207YX0901X
Provider Legal NameDR. MICHELLE SIEGEL MARRINANCredential: MD
Location Address49 LAKE AVEGreenwich, CT 06830-4501
Mailing Address49 Lake AveGreenwich, CT 06830-4501 · (203) 869-2030 · Fax (203) 869-9262
Phone(203) 869-2030
Fax(203) 869-9262
Sole ProprietorNo
Medical School CMSAlbert Einstein College Of Medicine Of Yeshiva UniversityGraduated 1997
Enumeration DateJune 23, 2005
Last NPPES UpdateSeptember 11, 2025
✔ NPI 1598761629 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOtolaryngology · Otology & NeurotologyAllopathic & Osteopathic Physicians
Taxonomy Code207YX0901X
License✔ Licensed in CT · 042226
Definition
An otolaryngologist who treats diseases of the ear and temporal bone, including disorders of hearing and balance. The additional training in otology and neurotology emphasizes the study of embryology, anatomy, physiology, epidemiology, pathophysiology, pathology, genetics, immunology, microbiology and the etiology of diseases of the ear and temporal bone.
Also ListedOtolaryngologyTaxonomy 207Y00000X · License 042226 (CT)
49 LAKE AVE, Greenwich, CT 06830
Open in Google Maps ↗

Other Names 1

Former Name (1)Michelle Siegel Md

Other Identifiers 1

Medicaid001422261CT

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Michelle Siegel Marrinan Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1456311752
PECOS Enrollment IDI20041012000701
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 Michelle Marrinan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Greenwich Ear Nose & Throat PC
0.1 mi
Otolaryngology
49 LAKE AVE
Greenwich, CT 06830
  • Reassigned Medicare billing, Connecticut enrollment
  • 11 clinicians in this Medicare group
NPI 1316012511 (203) 869-2030

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

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
211 services133 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
159 services133 patients
Removal of impacted ear wax 69210
Impacted ear wax removal is a safe procedure to clear blockages in the ear canal caused by hardened ear wax. A healthcare professional uses specialized tools or a gentle irrigation method to loosen and remove the wax, improving hearing and alleviating discomfort.
156 services132 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
60 services60 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
19 services19 patients
Test for eardrum and muscle function 92550
This test assesses the health of your eardrum and muscles linked to hearing. A small device is placed in your ear that creates pressure changes and sounds. Your ear's responses are recorded to determine if they are functioning properly.
18 services18 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Care Plan
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…
100%300 patients5/55-star benchmark: 100%
Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
100%306 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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. DAVID D EVANS M.D.
Radiology (Diagnostic Radiology)
49 LAKE AVE
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 861-2381
DR. JAMES STEPHEN BORGES MD
Specialist
49 LAKE AVE
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 661-2934
CENTER FOR ORAL AND IMPLANT SURGERY OF GREENWICH, LLC
Clinic/Center (Oral and Maxillofacial Surgery)
49 LAKE AVE
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 661-4231
DR. LYNNE M HAVEN M. D.,
Dermatology
49 LAKE AVE
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 869-4242
DR. MICHELE SHOSHANA BERGEN D.M.D., M.D.
Dentist (Oral and Maxillofacial Surgery)
49 LAKE AVE
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 661-4231
VINOD RAVIKUMAR M.D. LLC
Clinic/Center (Health Service)
49 LAKE AVE
GREENWICH, CT 06830
Western Connecticut Planning Region (845) 368-8808
JOSHUA JABLONSKI
Audiologist
49 LAKE AVE, SUITE 103
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 869-2030
MR. LOUIS VISCONTI
Pharmacist
49 LAKE AVE
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 869-5700

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 Michelle Marrinan's NPI number?

The NPI number for Michelle Marrinan is 1598761629. It was assigned to this individual provider in the NPPES registry on June 23, 2005. The provider is also known as Michelle Siegel MD.

Where is Michelle Marrinan located?

Michelle Marrinan practices at 49 Lake Ave, Greenwich, CT 06830. The listed phone number is (203) 869-2030.

What is Michelle Marrinan's specialty?

The primary specialty registered for this NPI is Otolaryngology, specializing in Otology & Neurotology, with taxonomy code 207YX0901X.

Is Michelle Marrinan enrolled in Medicare?

Yes. Michelle Marrinan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Michelle Marrinan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michelle Marrinan reassigns Medicare benefits to Greenwich Ear Nose & Throat PC (Greenwich, 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 Michelle Marrinan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Michelle Marrinan accept?

Health plans from Anthem Blue Cross and Blue Shield list Michelle Marrinan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Michelle Marrinan was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.