THOMAS B. CAHILL JR. MD
NPI 1023128113
Internal Medicine - Cardiovascular Disease in O Fallon, IL

Q: What is Thomas Cahill's NPI number?

The NPI number for Thomas Cahill is 1023128113. It was assigned to this individual provider in the NPPES registry on August 30, 2006.

Q: What is Thomas Cahill's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Q: When was this NPI record last updated?

The NPPES record for Thomas Cahill was last updated on December 21, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.

Active since August 30, 2006PECOS EnrolledAccepts Medicare Assignment

94.61/100

CMS Quality Rating

THREE SAINT ELIZABETH BLVD STE 2800, O FALLON, IL 62269(618) 233-6044(833) 973-4218 Get Directions Write a Review

NPPES record last updated: December 21, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Dec 21, 2021, Mar 18, 2020, Sep 30, 2019 and 2 more (5 updates tracked since 2018).

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About Thomas B. Cahill Jr. Md NPPES

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

THOMAS B. CAHILL JR. MD (NPI 1023128113) is an individual cardiovascular disease provider in O Fallon, Illinois, licensed in Illinois (036-060357) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Hshs Holy Family Hospital Inc, and is a graduate of Saint Louis University School Of Medicine (1978).

NPPES Registry Identity

NPI1023128113

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameTHOMAS B. CAHILL JR.Credential: MD

Location AddressTHREE SAINT ELIZABETH BLVD STE 2800O Fallon, IL 62269-1282

Mailing AddressThree Saint Elizabeth Blvd Ste 2800O Fallon, IL 62269-1282 · (618) 233-6044 · Fax (833) 973-4218

Phone(618) 233-6044

Fax(833) 973-4218

Sole ProprietorNo

Medical School CMSSaint Louis University School Of MedicineGraduated 1978

Enumeration DateAugust 30, 2006

Last NPPES UpdateDecember 21, 20215 updates tracked since enumeration

NPPES CertifiedDecember 21, 2021

✔ NPI 1023128113 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in IL · 036-060357

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

THREE SAINT ELIZABETH BLVD STE 2800, O Fallon, IL 62269

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Other Identifiers 1

Medicaid036060357IL

Accepted Insurance

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Thomas B. Cahill Jr. Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID143241703

PECOS Enrollment IDI20051209000672

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

Medicare enrollment records show Thomas Cahill reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

St Elizabeths Hospital Of The Hospital Sisters Of The Third Order

1.0 mi

Cardiovascular Disease

1 SAINT ELIZABETH BLVD
O Fallon, IL 62269

Reassigned Medicare billing, Illinois enrollment
38 clinicians in this Medicare group

NPI 1326268202 (618) 234-2120

Anderson Medical Group, LLC

10 mi

General Practice

6810 STATE ROUTE 162, SUITE 215
Maryville, IL 62062

Reassigned Medicare billing, Illinois enrollment
145 clinicians in this Medicare group

NPI 1700807716 (618) 288-5711

St Josephs Hospital Breese Of The Hospital Sisters Of The Third Orde

12 mi

Rural Health

211 E HANOVER ST
New Baden, IL 62265

Reassigned Medicare billing, Illinois enrollment
54 clinicians in this Medicare group

NPI 1821486085 (618) 588-2900

St Josephs Hospital Of The Hospital Sisters Of The Third Order Of St F

18 mi

Critical Access

12866 TROXLER AVE
Highland, IL 62249

Reassigned Medicare billing, Illinois enrollment
48 clinicians in this Medicare group

NPI 1447352323 (618) 654-7421

Hshs Holy Family Hospital Inc

35 mi

Obstetrics & Gynecology

150 HEALTHCARE DRIVE
Greenville, IL 62246

Reassigned Medicare billing, Illinois enrollment
42 clinicians in this Medicare group

NPI 1992889125 (618) 664-9830

Sarah Bush Lincoln Health Center

51 mi

Skilled Nursing Facility

650 W TAYLOR ST
Vandalia, IL 62471

Reassigned Medicare billing, Illinois enrollment
652 clinicians in this Medicare group

NPI 1306959689 (618) 283-1232

Prairie Cardiovascular Consultants Ltd

81 mi

Multi-Specialty

3051 HOLLIS DR FL 2
Springfield, IL 62704

Reassigned Medicare billing, Illinois enrollment
101 clinicians in this Medicare group

NPI 1982714218 (217) 492-9695

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

Areas of Expertise CMS Part B claims 14

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

687 services542 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

394 services298 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

168 services162 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

45 services41 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician 93016

An exercise or drug-induced heart stress test with ECG involves monitoring your heart's activity while it's under stress, either from exercise or medication. A doctor supervises the entire procedure to ensure safety and accuracy in results. This test helps detect heart problems.

34 services34 patients

Routine electrocardiogram (ecg) using at least 12 leads with tracing 93005

An Electrocardiogram (ECG) is a simple, painless test that records the heart's electrical activity. Using 12 leads attached to your skin, it generates a tracing of your heart rhythm. It helps detect any heart problems by showing the timing and strength of electrical signals passing through each part of your heart.

32 services31 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

32 services31 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician 93018

An exercise or drug-induced heart stress test with ECG is a procedure to assess how your heart functions under stress. It can involve exercising or medication to make your heart work harder while an ECG records its activity. A physician reviews the results.

32 services32 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

32 services14 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

31 services31 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

19 services19 patients

Nuclear medicine studies of heart muscle at rest and with stress and spect 78452

Nuclear medicine studies of the heart involve two parts: rest and stress. During rest, images are taken of your heart at ease. During stress, images are taken after exercise or medication-induced stress. SPECT is a special imaging technique providing 3D pictures of your heart, helping identify any issues.

16 services16 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

15 services15 patients

Ct scan of blood vessels and grafts of heart with contrast 75574

A CT scan of the heart's blood vessels and grafts with contrast is a diagnostic test. A special dye (contrast) is injected into your veins, which helps create clear images of your heart's vessels and grafts. This helps doctors detect blockages or other abnormalities.

11 services11 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Hshs Holy Family Hospital Inc

Acute Care Hospitals · Greenville, IL

OwnershipVoluntary non-profit - Church

CMS Certification Number140137

Location200 Health Care DrGreenville, IL 62246 · Bond County

Emergency services

St Josephs Hospital

Acute Care Hospitals · Breese, IL

OwnershipVoluntary non-profit - Church

CMS Certification Number140145

Location9515 Holy Cross LnBreese, IL 62230 · Clinton County

Emergency services Birthing friendly

Hshs St Elizabeth's Hospital

Acute Care Hospitals · O Fallon, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number140187

LocationOne St Elizabeth BoulevardO Fallon, IL 62269 · St. Clair County

Emergency services Birthing friendly

St Joseph's Hospital

Critical Access Hospitals · Highland, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number141336

Location12866 Troxler AvenueHighland, IL 62249 · Madison County

Emergency services

Sparta Community Hospital

Critical Access Hospitals · Sparta, IL

OwnershipGovernment - Hospital District or Authority

CMS Certification Number141349

Location818 E BroadwaySparta, IL 62286 · Randolph County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 62269 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

$131.14 typical visit price

range $56.28 – $173.35

Typical copayment $32.78 (range $14.07 – $43.33)

Most-billed visit code 99204

Established Patient

$70.42 typical visit price

range $17.51 – $139.99

Typical copayment $17.60 (range $4.37 – $34.99)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

94.61/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

85.17

Promoting Interoperability

100

Improvement Activities

Other Providers at the Same Location NPPES 15

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

REGINA Y CHIU M.D.

Internal Medicine (Cardiovascular Disease)