THOMAS G. MALLOY (M.D.) – Gastroenterology Physician, NPI 1285696161

THOMAS G. MALLOY (M.D.) is a healthcare provider. based in Duluth, Minnesota. specializing in Gastroenterology Physician. They hold the professional credentials M.D.. They hold a License No. 31007 (WI). The NPI Number for THOMAS G. MALLOY (M.D.) is 1285696161

Main info

Male
42 Years Of Experience
Accepts Medicare Assignment
Name
THOMAS G. MALLOY (M.D.)
NPI
1285696161
Phone
(218) 786-8364
Address
400 E 3RD ST
Enumeration Date
5 April 2006
Last Update Date
6 May 2014

Doctor Profile

Medical School Name
MEDICAL COLLEGE OF WISCONSIN
Secondary Phone
2187868364
Graduation Year
1984 (42 years ago)
PAC ID
3375530413
Group Practice PAC ID
2567374283
Professional Enrollment ID
I20140501001922
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience63
Completeness75
Years active:20State licenses:2Digital endpointsOther names

Loading map...

Provider Addresses for THOMAS G. MALLOY (M.D.)

  • 400, East 3rd Street, Duluth, Saint Louis County, Minnesota, 55805, United States

    ESSENTIA HEALTH DULUTH CLINIC

    DULUTH, MN 558051951

    Phone: (218) 786-8364

    Mailing address matches the actual address.

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

Loading prescription activity...

Open Payments (CMS)

No Open Payments data available for this provider.

This can happen when there are no reportable CMS Open Payments records.

Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

Top Medicare procedures (2023) · refreshed 2026-05-27

HCPCSDescriptionServicesBeneficiariesMedicare allowed
45385Removal of polyps or growths of large bowel using an endoscope with mechanical snare1313$0
43239Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope1212$0
45380Biopsy of large bowel using a flexible endoscope1212$0
View full utilization report →

Insurance plans in this area (ZIP 55805)

Loading plans...

Provider's Procedures

THOMAS G. MALLOY (M.D.) performs procedures in Gastroenterology Physician. See the list of HCPCS codes below.
SpecialtyPractice State
HCPCS Code
Description
Service Count
Beneficiary Count
GASTROENTEROLOGYMN45378Diagnostic examination of large bowel using an endoscope1717

Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.
PAC ID: 2567374283View full group profile
NameSpecialtyState
Physical Therapist In Private PracticeMT
-ND
Physician AssistantMN
Nurse PractitionerSD
-MN
Qualified AudiologistMN
-MN
-MN
P A T H O L O G YWV
Family PracticeMN

Reviews

All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.

No reviews yet. Be the first to share your experience — your opinion helps families compare providers.

Frequently asked questions

Can I use this page to confirm THOMAS G. MALLOY (M.D.)'s NPI?
Yes. THOMAS G. MALLOY (M.D.) is listed with NPI 1285696161 in the public NPI dataset.
Does CMS list THOMAS G. MALLOY (M.D.) as active?
Yes — THOMAS G. MALLOY (M.D.) is active in the NPI listing used on this page.
What taxonomy line describes THOMAS G. MALLOY (M.D.)?
For research purposes, treat THOMAS G. MALLOY (M.D.) as Gastroenterology Physician in this dataset. Clinical services aligned with this taxonomy classification.
What area does THOMAS G. MALLOY (M.D.) serve?
THOMAS G. MALLOY (M.D.)'s listing highlights Duluth, Minnesota; more addresses can appear in NPPES.
Why does THOMAS G. MALLOY (M.D.) have multiple addresses?
2 practice locations appear in the available data. Multiple addresses are common for hospital privileges, telehealth, or multi-site groups.

Similar Providers

JAMES L WISE (M.D.)

Gastroenterology Physician
400, East 3rd Street, Duluth, Saint Louis County, Minnesota, 55805, United States
NPI: 1982681334

DR. EMUEJEVOKE JOSEPH OKOH (M.D.)

Gastroenterology Physician
2305 37th Ave SW
NPI: 1013970482

DANIEL DUANE CORNETT (MD)

Gastroenterology Physician
382 S Arthur Ave
NPI: 1548228992

DR. WALDO AVELLO (M.D.)

Gastroenterology Physician
601 John St Ste M-302
NPI: 1922057322
1015 E 1ST ST
NPI: 1902850605

JOHN CHRISTOPHER DEUTSCH

Gastroenterology Physician
400, East 3rd Street, Duluth, Saint Louis County, Minnesota, 55805, United States
NPI: 1477593549

ROBERT V ERICKSON

Gastroenterology Physician
400, East 3rd Street, Duluth, Saint Louis County, Minnesota, 55805, United States
NPI: 1952342503

STEVEN JOSEPH SQUILLACE (MD)

Gastroenterology Physician
400, East 3rd Street, Duluth, Saint Louis County, Minnesota, 55805, United States
NPI: 1114961109

TIMOTHY ALAN RUBIN (MD)

Gastroenterology Physician
400, East 3rd Street, Duluth, Saint Louis County, Minnesota, 55805, United States
NPI: 1801830856