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PATRICK J GALLAGHER MD SC
NPI 1639554793
Internal Medicine in Chicago, IL

Active since July 29, 2015
211 E CHICAGO AVE, SUITE 1300, CHICAGO, IL 60611(773) 995-8961 Get Directions Write a Review

NPPES record last updated: March 27, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Patrick J Gallagher Md Sc NPPES

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

PATRICK J GALLAGHER MD SC (NPI 1639554793) is a healthcare organization registered as an internal medicine in Chicago, Illinois and active in the NPI registry since July 2015. The organization lists Patrick John Gallagher, President, as its authorized official.

NPPES Registry Identity

NPI1639554793
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NamePATRICK J GALLAGHER MD SC
Location Address211 E CHICAGO AVE, SUITE 1300Chicago, IL 60611-2637
Mailing Address211 E Chicago Ave Ste 1700Chicago, IL 60611-2672 · (773) 995-8961
Phone(773) 995-8961
Organization SubpartYesParent: Patrick J. Gallagher, M.d., S.c.
Authorized OfficialPatrick John GallagherPresident · (773) 318-0456
Enumeration DateJuly 29, 2015
Last NPPES UpdateMarch 27, 2026
NPPES CertifiedMarch 27, 2026
✔ NPI 1639554793 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 036137979
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
211 E CHICAGO AVE, Chicago, IL 60611
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Patrick J Gallagher Md Sc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Patrick J Gallagher MD Sc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Patrick Gallagher, M.D.
Internal Medicine
NPI 1669735650
1900 W POLK ST
Chicago, IL 60612
(312) 864-0060
✔ PECOS3.1 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Patrick J Gallagher MD Sc's NPI number?

The NPI number for Patrick J Gallagher MD Sc is 1639554793. It was assigned to this organization in the NPPES registry on July 29, 2015.

Where is Patrick J Gallagher MD Sc located?

Patrick J Gallagher MD Sc is located at 211 E Chicago Ave Suite 1300, Chicago, IL 60611. The listed phone number is (773) 995-8961.

What is Patrick J Gallagher MD Sc's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Patrick J Gallagher MD Sc enrolled in Medicare?

Yes. Patrick J Gallagher MD Sc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Patrick J Gallagher MD Sc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Patrick J Gallagher MD Sc. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Patrick J Gallagher MD Sc was last updated on March 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.