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SANDRA L CONTRERAS MARTINEZ
NPI 1497509061
Nurse Practitioner in Norwalk, CT

Active since April 11, 2024PECOS EnrolledAccepts Medicare Assignment
637 WEST AVE FL 2, NORWALK, CT 06850(203) 276-6122 Get Directions Write a Review

NPPES record last updated: July 30, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 3, 2024, Apr 11, 2024 (2 updates tracked since 2024).

About Sandra L Contreras Martinez NPPES

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

SANDRA L CONTRERAS MARTINEZ (NPI 1497509061) is an individual nurse practitioner in Norwalk, Connecticut, licensed in Connecticut (13403) and active in the NPI registry since April 2024. She is enrolled in Medicare PECOS and is a graduate of Other (2023).

NPPES Registry Identity

NPI1497509061
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameSANDRA L CONTRERAS MARTINEZ
Location Address637 WEST AVE FL 2Norwalk, CT 06850-4004
Mailing Address637 West Ave Fl 2Norwalk, CT 06850-4004 · (203) 276-6122
Phone(203) 276-6122
Sole ProprietorNo
Medical School CMSOtherGraduated 2023
Enumeration DateApril 11, 2024
Last NPPES UpdateJuly 30, 20252 updates tracked since enumeration
NPPES CertifiedJuly 30, 2025
✔ NPI 1497509061 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in CT · 13403
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
637 WEST AVE FL 2, Norwalk, CT 06850
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Other Names 1

Former Name (1)Sandra Liliana Martinez

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

Sandra L Contreras Martinez 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 ID6103332309
PECOS Enrollment IDI20250723003643
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 Sandra Contreras Martinez reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Stamford Health Medical Group Inc
5.7 mi
General Practice
ONE OMEGA DRIVE, BUILDING 3, 2ND FLOOR
Stamford, CT 06907
  • Reassigned Medicare billing, Connecticut enrollment
  • 496 clinicians in this Medicare group
NPI 1154633980 (203) 276-7447

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 06850 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
$93.86 typical visit price
range $60.82 – $183.10
Typical copayment $23.46 (range $15.20 – $45.77)
Most-billed visit code 99203
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.

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 Sandra Contreras Martinez's NPI number?

The NPI number for Sandra Contreras Martinez is 1497509061. It was assigned to this individual provider in the NPPES registry on April 11, 2024. The provider is also known as Sandra Liliana Martinez.

Where is Sandra Contreras Martinez located?

Sandra Contreras Martinez practices at 637 West Ave Fl 2, Norwalk, CT 06850. The listed phone number is (203) 276-6122.

What is Sandra Contreras Martinez's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Sandra Contreras Martinez enrolled in Medicare?

Yes. Sandra Contreras Martinez 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 Sandra Contreras Martinez's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sandra Contreras Martinez reassigns Medicare benefits to Stamford Health Medical Group Inc (Stamford, 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 Sandra Contreras Martinez's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sandra Contreras Martinez accept?

Health plans from Anthem Blue Cross and Blue Shield list Sandra Contreras Martinez 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 Sandra Contreras Martinez was last updated on July 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.