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THOMAS BARTHOLOMEW FLANAGAN MD
NPI 1508841883
Internal Medicine in Elk Grove Village, IL

Active since December 09, 2005PECOS Enrolled
800 W BIESTERFIELD RD, SUITE 206, ELK GROVE VILLAGE, IL 60007(847) 981-3678(847) 956-5113 Get Directions Write a Review

NPPES record last updated: January 19, 2017. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Thomas Bartholomew Flanagan Md NPPES

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

THOMAS BARTHOLOMEW FLANAGAN MD (NPI 1508841883) is an individual internal medicine provider in Elk Grove Village, Illinois, licensed in Illinois (036055833) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1508841883
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameTHOMAS BARTHOLOMEW FLANAGANCredential: MD
Location Address800 W BIESTERFIELD RD, SUITE 206Elk Grove Village, IL 60007-3378
Mailing Address3040 W Salt Creek LnArlington Heights, IL 60005-1069 · (847) 870-4780 · Fax (847) 483-7447
Phone(847) 981-3678
Fax(847) 956-5113
Sole ProprietorNo
Enumeration DateDecember 9, 2005
Last NPPES UpdateJanuary 19, 2017
✔ NPI 1508841883 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 · 036055833
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.
800 W BIESTERFIELD RD, Elk Grove Village, IL 60007
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Thomas Bartholomew Flanagan Md 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 Reassignment

Medicare enrollment records show Thomas Flanagan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ascension Medical Group-Southeast Wisconsin Inc
73 mi
Anesthesiology
2301 N LAKE DR
Milwaukee, WI 53211
  • Reassigned Medicare billing, Wisconsin enrollment
  • 1,343 clinicians in this Medicare group
NPI 1194473066 (414) 585-1000

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 60007 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
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
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 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

NORTHWEST RHEUMATOLOGY SPECIALISTS, S.C.
Internal Medicine (Rheumatology)
800 W BIESTERFIELD RD, STE 4003
ELK GROVE VILLAGE, IL 60007
Cook County (847) 364-0800
LYNNETTE MARIE JACOBS-PUPINO MD
Internal Medicine
800 W BIESTERFIELD RD, SUITE 206
ELK GROVE VILLAGE, IL 60007
Cook County (847) 981-3678

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 Thomas Flanagan's NPI number?

The NPI number for Thomas Flanagan is 1508841883. It was assigned to this individual provider in the NPPES registry on December 9, 2005.

Where is Thomas Flanagan located?

Thomas Flanagan practices at 800 W Biesterfield Rd Suite 206, Elk Grove Village, IL 60007. The listed phone number is (847) 981-3678.

What is Thomas Flanagan's specialty?

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

Is Thomas Flanagan enrolled in Medicare?

Yes. Thomas Flanagan is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Thomas Flanagan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Flanagan reassigns Medicare benefits to Ascension Medical Group-Southeast Wisconsin Inc (Milwaukee, WI). The 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 Thomas Flanagan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Thomas Flanagan accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Thomas Flanagan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Thomas Flanagan was last updated on January 19, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.