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KAREN MARRERO MD
NPI 1427383330
Internal Medicine in New Rochelle, NY

Active since October 09, 2009PECOS Enrolled
838 PELHAMDALE AVE, NEW ROCHELLE, NY 10801(914) 632-2030 Get Directions Write a Review

NPPES record last updated: October 14, 2009. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Karen Marrero Md NPPES

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

KAREN MARRERO MD (NPI 1427383330) is an individual internal medicine provider in New Rochelle, New York, licensed in New York (254995) and active in the NPI registry since October 2009. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1427383330
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameKAREN MARREROCredential: MD
Location Address838 PELHAMDALE AVENew Rochelle, NY 10801-1718
Mailing Address3555 Oxford Ave, Apt 4aBronx, NY 10463-1718 · (718) 825-9960
Phone(914) 632-2030
Sole ProprietorNo
Enumeration DateOctober 9, 2009
Last NPPES UpdateOctober 14, 2009
✔ NPI 1427383330 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in NY · 254995
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.
838 PELHAMDALE AVE, New Rochelle, NY 10801
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Cigna Healthcare, Cigna HealthCare of Florida, Inc..Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Karen Marrero 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 Reassignment

Medicare enrollment records show Karen Marrero reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Gutierrez Medical Center, LLC
953 mi
Primary Care
601 S SEMORAN BLVD
Orlando, FL 32807
  • Reassigned Medicare billing, Florida enrollment
  • 2 clinicians in this Medicare group
NPI 1750729075 (407) 203-6898

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 10801 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
$154.28 typical visit price
range $67.40 – $203.53
Typical copayment $38.57 (range $16.85 – $50.88)
Most-billed visit code 99204
Established Patient
$117.62 typical visit price
range $21.66 – $164.45
Typical copayment $29.40 (range $5.41 – $41.11)
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 11

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

ACUPUNCTURE GO P.C.
Acupuncturist
838 PELHAMDALE AVE
NEW ROCHELLE, NY 10801
Westchester County (914) 837-3135
JAY GOLDMAN LAC
Acupuncturist
838 PELHAMDALE AVE
NEW ROCHELLE, NY 10801
Westchester County (914) 837-3135
MR. HANS NICOLAS DESNOYERS LMSW
Social Worker
838 PELHAMDALE AVE
NEW ROCHELLE, NY 10801
Westchester County (914) 316-4684
JOEL G. GREENSPAN, M.D. PC
Specialist
838 PELHAMDALE AVE
NEW ROCHELLE, NY 10801
Westchester County (800) 738-1659
ANNMARIE T. BALDANTI, MD, PLLC
Internal Medicine
838 PELHAMDALE AVE
NEW ROCHELLE, NY 10801
Westchester County (914) 632-2030
ANDREW C. KLEIN PHYSICAL THERAPY, P.C.
Physical Medicine & Rehabilitation
838 PELHAMDALE AVE
NEW ROCHELLE, NY 10801
Westchester County (914) 576-5827
EYE SURGERY CENTER OF WESTCHESTER, INC
Clinic/Center (Ophthalmologic Surgery)
838 PELHAMDALE AVE
NEW ROCHELLE, NY 10801
Westchester County (914) 576-9600
DR. DAVID M LANS DO FACP
Internal Medicine (Rheumatology)
838 PELHAMDALE AVE
NEW ROCHELLE, NY 10801
Westchester County (914) 637-8809

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 Karen Marrero's NPI number?

The NPI number for Karen Marrero is 1427383330. It was assigned to this individual provider in the NPPES registry on October 9, 2009.

Where is Karen Marrero located?

Karen Marrero practices at 838 Pelhamdale Ave, New Rochelle, NY 10801. The listed phone number is (914) 632-2030.

What is Karen Marrero's specialty?

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

Is Karen Marrero enrolled in Medicare?

Yes. Karen Marrero is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Karen Marrero's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karen Marrero reassigns Medicare benefits to Gutierrez Medical Center, LLC (Orlando, FL). 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 Karen Marrero's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Karen Marrero accept?

Health plans from Cigna HealthCare of Florida, Inc. and Cigna Healthcare list Karen Marrero 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 Karen Marrero was last updated on October 14, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.