Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Colorectal Surgery (Proctology)

Marilee L. Freitas, MD

Works at hospitals in Stamford, CT · Connecticut

Summary

Dr. Marilee L. Freitas, MD is a colorectal surgeon at 1 Hospital Plz, Stamford, CT 06902. Phone: (203) 276-1000. Accepts Medicare assignment. In 2024, Marilee L. Freitas had 242 Original Medicare patients and 538 services. NPI 1023285343. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Colorectal surgeon (Medicare lists Colorectal Surgery (Proctology))
  • Address: 1 Hospital Plz, Stamford, CT 06902 · Directions (5 more locations)
  • Phone: (203) 276‑1000
  • Medicare: Accepts Medicare assignment
  • Hospital: Stamford Hospital
  • Group practice: Stamford Health Medical Group Inc
  • Medical school: graduated 1998 (28 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Marilee L. Freitas, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Marilee L. Freitas accept Medicare assignment?
Yes. Medicare's clinician data says Marilee L. Freitas accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Marilee L. Freitas see?
In 2024, CMS data shows 242 Original Medicare patients and 538 services for Marilee L. Freitas. This counts Original Medicare only and measures volume, not quality.
What is Marilee L. Freitas's NPI number?
1023285343. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Marilee L. Freitas, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients242
Services billed to Medicare538
Different services or procedures40
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)96 services
  2. Diagnostic exam of anus using an endoscope (46600)68 services
  3. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)68 services
  4. Removal of external hemorrhoids by rubber banding (46221)50 services
  5. Biopsy of large bowel using a flexible endoscope (45380)49 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol71%
  • High blood pressure64%
  • Arthritis48%
  • Anxiety29%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)26%
  • Ischemic heart disease24%

Hospitals where Marilee L. Freitas works

Medicare's Facility Affiliation Data lists Marilee L. Freitas at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • Stamford HospitalStamford, CT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 070006

Practice locations

Addresses where Marilee L. Freitas is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.

Group practices

Medicare enrollment lists Marilee L. Freitas as a member of this group (CMS data updated October 2, 2026).

  • Stamford Health Medical Group Inc444 clinicians in the group

Specialties

Find other Colorectal Surgery (Proctology) doctors in Connecticut →

Other colorectal surgeons in Connecticut

Clinicians with the same Medicare primary specialty in Connecticut — not a recommendation.

All colorectal surgeons in Connecticut →

Other clinicians in Stamford Health Medical Group Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Graduation year1998 (28 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1023285343
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians