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DR. KIM-DOAN KATRINA NGUYEN M.D.
NPI 1235371386
Pediatrics - Pediatric Gastroenterology in Stamford, CT

Active since April 02, 2009PECOS Enrolled
1180 NEWFIELD AVE, STAMFORD, CT 06905(314) 888-5233 Get Directions Write a Review

NPPES record last updated: March 17, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 17, 2023, Jun 22, 2021 (2 updates tracked since 2021).

About Dr. Kim-doan Katrina Nguyen M.d. NPPES

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

DR. KIM-DOAN KATRINA NGUYEN M.D. (NPI 1235371386) is an individual pediatric gastroenterology provider in Stamford, Connecticut, licensed in Illinois (036130552) and active in the NPI registry since April 2009. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1235371386
Entity TypeIndividualFemale
Primary Taxonomy2080P0206X
Provider Legal NameDR. KIM-DOAN KATRINA NGUYENCredential: M.D.
Location Address1180 NEWFIELD AVEStamford, CT 06905-1409
Mailing Address1180 Newfield AveStamford, CT 06905-1409 · (314) 888-5233
Phone(314) 888-5233
Sole ProprietorNo
Enumeration DateApril 2, 2009
Last NPPES UpdateMarch 17, 20232 updates tracked since enumeration
NPPES CertifiedMarch 17, 2023
✔ NPI 1235371386 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0206X
Licenses✔ Licensed in IL · 036130552✔ Licensed in WI · 64213-20
Definition
A pediatrician who specializes in the diagnosis and treatment of diseases of the digestive systems of infants, children and adolescents. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using lighted scopes to see internal organs.
1180 NEWFIELD AVE, Stamford, CT 06905
Open in Google Maps ↗

Other Names 1

Former Name (1)Miss Doan Kim Nguyen

Other Identifiers 1

Medicaid036130552IL

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Kim-doan Katrina Nguyen M.d. 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

3

Medicare enrollment records show Kim-doan Nguyen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

My Catholic Doctor, P.L.L.C.
5.4 mi
Pediatrics
711 SILVERMINE RD
New Canaan, CT 06840
  • Reassigned Medicare billing, Illinois enrollment
  • Medicare enrollment name: My Catholic Doctor PLLC
  • 3 clinicians in this Medicare group
NPI 1396201307 (314) 435-6105
Rockford Health Physicians
801 mi
Multi-Specialty
8201 E RIVERSIDE BLVD
Rockford, IL 61114
  • Reassigned Medicare billing, Illinois enrollment
  • 1,375 clinicians in this Medicare group
NPI 1043242886 (608) 314-2428
Mercy Health System Corporation
805 mi
Mental Health (Including Community Mental Health Center)
903 MINERAL POINT AVE
Janesville, WI 53548
  • Reassigned Medicare billing, Wisconsin enrollment
  • 1,155 clinicians in this Medicare group
NPI 1669685129 (608) 756-5555

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 06905 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.

DEBRA SUSAN GRAMLICH M.D.
Family Medicine
1180 NEWFIELD AVE
STAMFORD, CT 06905
Western Connecticut Planning Region (314) 888-5233
ANA G SCHMUDE MA
Counselor
1180 NEWFIELD AVE
STAMFORD, CT 06905
Western Connecticut Planning Region (314) 888-5233
JENNIFER C MORTON PT, DPT
Physical Therapist
1180 NEWFIELD AVE
STAMFORD, CT 06905
Western Connecticut Planning Region (314) 888-5233
ELAINE BILBILY SCHENK
Family Medicine
1180 NEWFIELD AVE
STAMFORD, CT 06905
Western Connecticut Planning Region (314) 888-5233
PATRICK D FLANIGAN FNP-C
Nurse Practitioner (Family)
1180 NEWFIELD AVE
STAMFORD, CT 06905
Western Connecticut Planning Region (314) 888-5233
KATRISHA VILLARANTE LPC
Counselor (Mental Health)
1180 NEWFIELD AVE
STAMFORD, CT 06905
Western Connecticut Planning Region (314) 888-5233
MRS. DIANE LYNN DUNNIWAY NPP
Nurse Practitioner (Obstetrics & Gynecology)
1180 NEWFIELD AVE
STAMFORD, CT 06905
Western Connecticut Planning Region (314) 888-5233
BERNADETTE POWELL
Physician Assistant
1180 NEWFIELD AVE
STAMFORD, CT 06905
Western Connecticut Planning Region (314) 888-5233

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 Kim-doan Nguyen's NPI number?

The NPI number for Kim-doan Nguyen is 1235371386. It was assigned to this individual provider in the NPPES registry on April 2, 2009. The provider is also known as Miss Doan Kim Nguyen.

Where is Kim-doan Nguyen located?

Kim-doan Nguyen practices at 1180 Newfield Ave, Stamford, CT 06905. The listed phone number is (314) 888-5233.

What is Kim-doan Nguyen's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Gastroenterology, with taxonomy code 2080P0206X.

Is Kim-doan Nguyen enrolled in Medicare?

Yes. Kim-doan Nguyen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Kim-doan Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kim-doan Nguyen reassigns Medicare benefits to 3 organizations: My Catholic Doctor, P.L.L.C. (New Canaan, CT), Rockford Health Physicians (Rockford, IL) and Mercy Health System Corporation (Janesville, WI). 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 Kim-doan Nguyen'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 Kim-doan Nguyen was last updated on March 17, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.