ISAAC THOMAS MD
NPI 1083662894
Internal Medicine - Cardiovascular Disease in Gurnee, IL

Q: What is Isaac Thomas's NPI number?

The NPI number for Isaac Thomas is 1083662894. It was assigned to this individual provider in the NPPES registry on May 4, 2006.

Q: What is Isaac Thomas'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 Isaac Thomas was last updated on May 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.

Active since May 04, 2006PECOS EnrolledAccepts Medicare Assignment

100/100

CMS Quality Rating

222 S GREENLEAF ST STE 109, GURNEE, IL 60031(847) 336-1600(847) 336-2380 Get Directions Write a Review

NPPES record last updated: May 8, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Isaac Thomas Md NPPES

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

ISAAC THOMAS MD (NPI 1083662894) is an individual cardiovascular disease provider in Gurnee, Illinois, licensed in Wisconsin (13522) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Midwestern Region Med Center, Inc, and maintains a secondary practice location in Pleasant Prairie.

NPPES Registry Identity

NPI1083662894

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameISAAC THOMASCredential: MD

Location Address222 S GREENLEAF ST STE 109Gurnee, IL 60031-5705

Mailing Address3915 Oglesby AveGurnee, IL 60031-3358 · (847) 336-1600 · Fax (847) 336-2380

Phone(847) 336-1600

Fax(847) 336-2380

Sole ProprietorNo

Medical School CMSOtherGraduated 1979

Enumeration DateMay 4, 2006

Last NPPES UpdateMay 8, 2026

NPPES CertifiedMay 8, 2026

✔ NPI 1083662894 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

Licenses✔ Licensed in WI · 13522✔ Licensed in IL · 036.063274

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.

Also ListedSpecialistTaxonomy 174400000X · License 036063274 (IL)

222 S GREENLEAF ST STE 109, Gurnee, IL 60031

Open in Google Maps ↗

Secondary Practice Location 1

Location 110256 Old Green Bay RdPleasant Prairie, WI 53158-2814 · Phone (847) 336-1600 · Fax (847) 336-2380

Other Identifiers 3

Medicaid036063274IL

Medicaid100268582WI

Other763284IL · Railroad Medicare

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Anthem Blue Cross and Blue Shield 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

Isaac Thomas 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 ID6305884180

PECOS Enrollment IDI20081218000517, I20260504006726

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 Isaac Thomas reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Thomas And Thomas Medical Ltd

Same address

Specialist

222 S GREENLEAF ST STE 109
Gurnee, IL 60031

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

NPI 1427090125 (847) 336-1600

City Of Hope Medical Group Of Illinois PLLC

7.5 mi

Specialist

2520 ELISHA AVE
Zion, IL 60099

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

NPI 1548258072 (847) 746-4358

Froedtert South, Inc.

16 mi

Family Medicine

6308 8TH AVE
Kenosha, WI 53143

Reassigned Medicare billing, Wisconsin enrollment
212 clinicians in this Medicare group

NPI 1558305284 (262) 656-2718

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 25

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 services532 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.

350 services169 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.

261 services132 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.

231 services158 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

158 services103 patients

Injection, regadenoson, 0.1 mg J2785

Regadenoson injection, 0.1 mg, is a medication used to help visualize the heart during a stress test. It works by increasing blood flow in the arteries of the heart. It's injected into a vein and is generally well-tolerated.

156 services39 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.

82 services42 patients

Technetium tc-99m sestamibi, diagnostic, per study dose A9500

Technetium Tc-99m Sestamibi is a diagnostic test used to create images of your heart or breast tissues. It involves a safe radioactive substance injection that helps doctors to detect any abnormalities or changes in these tissues.

80 services40 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

53 services45 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.

49 services48 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.

49 services48 patients

Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days 93294

This procedure evaluates your pacemaker system remotely for up to 90 days. It checks whether single, dual, multiple lead, or leadless pacemakers are working properly. It's a safe, convenient way to ensure your heart device is functioning optimally.

48 services20 patients

Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days 93296

This procedure involves remotely monitoring your pacemaker or implantable defibrillator system. Over a 90-day period, we check the device's performance and your heart's activity. This helps ensure the device is functioning properly and providing the best possible support for your heart health.

47 services20 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) 93017

An exercise or drug-induced heart stress test with an ECG checks how your heart responds to stress. You'll either exercise on a treadmill or be given medication to stress your heart. An ECG then captures your heart's activity, helping detect any issues.

45 services44 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

45 services45 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.

44 services17 patients

Injection of drug or substance into vein 96374

This procedure involves introducing a medication or substance directly into your vein using a syringe. It's a quick and efficient way to deliver treatment throughout your body. You might feel a small prick when the needle enters. It's generally safe and effective.

42 services42 patients

Injection of additional new drug or substance into vein 96375

This procedure involves introducing a new medication or substance into your bloodstream via a vein. It's typically done using a small needle. The substance can help treat various conditions or assist in diagnostic procedures. It's generally safe and monitored by professionals.

35 services35 patients

Telephone medical discussion with physician, 21-30 minutes 99443

This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.

31 services27 patients

Infusion, normal saline solution, 250 cc J7050

An infusion of normal saline solution, 250 cc, involves administering a sterile saltwater solution into your body through a vein, usually in your arm. This helps to replenish fluids, maintain hydration, and balance electrolytes in your body.

26 services26 patients

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

22 services22 patients

Evaluation of single, dual, multiple lead or leadless pacemaker system 93288

An evaluation of a pacemaker system examines how well your heart device is working. Single, dual, multiple lead, or leadless refers to the wires that deliver electrical pulses from the pacemaker to your heart. This check ensures your heart is receiving the right amount of support from the device.

18 services16 patients

Heart muscle strain imaging 93356

Heart muscle strain imaging is a non-invasive test that uses sound waves to create pictures of your heart. It helps doctors evaluate how well your heart muscle is working and detect any damage or disease. This can aid in diagnosing heart conditions and guiding treatment plans.

14 services12 patients

Influenza vaccine split virus, preservative free 90662

The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.

12 services12 patients

Administration of influenza virus vaccine G0008

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

11 services11 patients

Hospital Affiliations CMS Care Compare 3

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

Midwestern Region Med Center, Inc

Acute Care Hospitals · Zion, IL

5/5 CMS rating

OwnershipProprietary

CMS Certification Number140100

Location2520 Elisha AvenueZion, IL 60099 · Lake County

Emergency services

Advocate Condell Medical Center

Acute Care Hospitals · Libertyville, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140202

Location801 S Milwaukee AveLibertyville, IL 60048 · Lake County

Emergency services Birthing friendly

Froedtert South Inc.

Acute Care Hospitals · Pleasant Prairie, WI

1/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number520021

Location9555 76th StPleasant Prairie, WI 53158 · Kenosha County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60031 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

$137.43 typical visit price

range $59.81 – $181.38

Typical copayment $34.35 (range $14.95 – $45.34)

Most-billed visit code 99204

Established Patient

$74.38 typical visit price

range $19.15 – $147.12

Typical copayment $18.59 (range $4.78 – $36.78)

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.

100/100

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

Scored as part of a group practice

Quality

91.65

Improvement Activities

Cost

100

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.

THOMAS AND THOMAS MEDICAL LTD

Specialist

222 S GREENLEAF ST STE 109
GURNEE, IL 60031

Lake County (847) 336-1600

SAMARENDRA CHANDEL MD

Internal Medicine (Cardiovascular Disease)

222 S GREENLEAF ST STE 109
GURNEE, IL 60031

Lake County (847) 336-1600

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 Isaac Thomas's NPI number?

The NPI number for Isaac Thomas is 1083662894. It was assigned to this individual provider in the NPPES registry on May 4, 2006.

Where is Isaac Thomas located?

Isaac Thomas practices at 222 S Greenleaf St Ste 109, Gurnee, IL 60031. The listed phone number is (847) 336-1600.

What is Isaac Thomas's specialty?

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

Is Isaac Thomas enrolled in Medicare?

Yes. Isaac Thomas is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Isaac Thomas's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Isaac Thomas reassigns Medicare benefits to 3 organizations: Thomas And Thomas Medical Ltd (Gurnee, IL), City Of Hope Medical Group Of Illinois PLLC (Zion, IL) and Froedtert South, Inc. (Kenosha, WI). Each 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 Isaac Thomas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Isaac Thomas accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Anthem Blue Cross and Blue Shield and Network Health list Isaac Thomas 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.

Is Isaac Thomas affiliated with any hospitals?

According to CMS data, Isaac Thomas is affiliated with Midwestern Region Med Center, Inc, Advocate Condell Medical Center and Froedtert South Inc..

When was this NPI record last updated?

The NPPES record for Isaac Thomas was last updated on May 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.