DR. THOMAS J NIELSEN (M.D.) – Otolaryngology Physician, NPI 1235138546

DR. THOMAS J NIELSEN (M.D.) is a healthcare provider. based in Chicago, Illinois. specializing in Otolaryngology Physician. They hold the professional credentials M.D.. They hold a License No. 036072375 (IL). The NPI Number for DR. THOMAS J NIELSEN (M.D.) is 1235138546

Main info

Male
42 Years Of Experience
Accepts Medicare Assignment
Name
DR. THOMAS J NIELSEN (M.D.)
NPI
1235138546
Phone
(312) 942-6100
Address
1611 W HARRISON ST
Enumeration Date
19 July 2005
Last Update Date
4 May 2011

Doctor Profile

Medical School Name
RUSH MEDICAL COLLEGE OF RUSH UNIVERSITY
Secondary Phone
3129426100
Graduation Year
1984 (42 years ago)
PAC ID
0244207215
Group Practice PAC ID
6406855261
Professional Enrollment ID
I20100928000335
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

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Provider Addresses for DR. THOMAS J NIELSEN (M.D.)

  • Subway, 1611, West Harrison Street, Near West Side, Illinois Medical District, Chicago, Illinois Medical District, Illinois, 60607, United States

    SUITE 550

    CHICAGO, IL 606124861

    Phone: (312) 942-6100

    Fax: (312) 942-6225

    Mailing address matches the actual address.

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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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.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 60612)

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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: 6406855261View full group profile
NameSpecialtyState
DR. JILL STARZYK JEFFE (MD)
-IL
INNA HUSAIN (M.D.)
O T O L A R Y N G O L O G YIL
CLAIRE HINKLE
-IL

Reviews

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Frequently asked questions

What is DR. THOMAS J NIELSEN (M.D.)'s NPI number?
DR. THOMAS J NIELSEN (M.D.)'s NPI is 1235138546 — the number used across U.S. healthcare to identify this provider.
Is DR. THOMAS J NIELSEN (M.D.) still an active registrant?
DR. THOMAS J NIELSEN (M.D.) carries an active NPI according to the public dataset.
What kind of doctor is DR. THOMAS J NIELSEN (M.D.)?
DR. THOMAS J NIELSEN (M.D.) is associated with Otolaryngology Physician in the directory — Clinical services aligned with this taxonomy classification.
Is DR. THOMAS J NIELSEN (M.D.) associated with Chicago?
Public fields place DR. THOMAS J NIELSEN (M.D.) around Chicago, Illinois. Always confirm the exact site before visiting.
Can I trust this NPI listing for DR. THOMAS J NIELSEN (M.D.)?
The listing is sourced from the national NPI registry. If something looks off, compare with NPPES and the clinic's website.

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