THESSA GRACE ROBERTSON MD
NPI 1851332514
Emergency Medicine in Gary, IN

Q: What is Thessa Robertson's NPI number?

The NPI number for Thessa Robertson is 1851332514. It was assigned to this individual provider in the NPPES registry on June 10, 2006.

Q: What is Thessa Robertson's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Q: When was this NPI record last updated?

The NPPES record for Thessa Robertson was last updated on April 8, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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 June 10, 2006PECOS EnrolledAccepts Medicare Assignment

600 GRANT STREET, GARY, IN 46402(219) 886-4601(219) 886-4603 Get Directions Write a Review

NPPES record last updated: April 8, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Thessa Grace Robertson Md NPPES

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

THESSA GRACE ROBERTSON MD (NPI 1851332514) is an individual emergency medicine provider in Gary, Indiana, licensed in Indiana (01061982A) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS, is affiliated with Methodist Hospitals Inc, and maintains a secondary practice location in Bolingbrook.

NPPES Registry Identity

NPI1851332514

Entity TypeIndividualFemale

Primary Taxonomy207P00000X

Provider Legal NameTHESSA GRACE ROBERTSONCredential: MD

Location Address600 GRANT STREETGary, IN 46402

Mailing Address600 Grant StreetGary, IN 46402 · (219) 886-4601 · Fax (219) 886-4603

Phone(219) 886-4601

Fax(219) 886-4603

Sole ProprietorNo

Medical School CMSOtherGraduated 2002

Enumeration DateJune 10, 2006

Last NPPES UpdateApril 8, 2021

NPPES CertifiedApril 8, 2021

✔ NPI 1851332514 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in IN · 01061982A

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

600 GRANT STREET, Gary, IN 46402

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Secondary Practice Location 1

Location 1145 N Weber RdBolingbrook, IL 60490-1504 · Phone (888) 693-6437

Other Identifiers 1

Medicaid036113290IL

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

Thessa Grace Robertson 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 ID4284679853

PECOS Enrollment IDI20050623000631, I20070731000443

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

Cep America LLC

Same address

Emergency Medicine

600 GRANT ST
Gary, IN 46402

Reassigned Medicare billing, Indiana enrollment
598 clinicians in this Medicare group

NPI 1619538055 (219) 886-4000

Advocate Health & Hospitals Corporation

21 mi

Medical Specialty

4440 W 95TH ST
Oak Lawn, IL 60453

Reassigned Medicare billing, Illinois enrollment
Medicare enrollment name: Advocate Health And Hospitals Corporation
4,870 clinicians in this Medicare group

NPI 1912936014 (847) 390-5900

Dupage Medical Group Ltd

37 mi

Multi-Specialty

1100 W 31ST ST, STE 300
Downers Grove, IL 60515

Reassigned Medicare billing, Illinois enrollment
1,061 clinicians in this Medicare group

NPI 1801833983 (630) 469-9200

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 17

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.

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.

107 services106 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.

60 services60 patients

Emergency department visit with high level of medical decision making 99285

An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.

52 services52 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

43 services42 patients

Respiratory infectious agent detection by rna for severe acute respiratory syndrome coronavirus 2 (covid 19), influenza a, influenza b, and respiratory syncytial virus, upper respiratory specimen, each reported as detected or not detected 0241U

This test detects the RNA of respiratory viruses, including COVID-19, Influenza A, Influenza B, and Respiratory Syncytial Virus, in an upper respiratory specimen. The test result will report if each virus is detected or not, helping in accurate diagnosis.

34 services34 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.

31 services29 patients

Electrocardiogram (ecg) 1 to 3 leads with review by physician only 93042

An Electrocardiogram (ECG) is a non-invasive test that records the electrical activity of your heart. 1 to 3 leads or sensors are placed on your body to capture this data. A physician then reviews the results to evaluate your heart's health.

30 services30 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

29 services29 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count 85025

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

28 services28 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.

25 services25 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.

20 services20 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.

20 services20 patients

Blood test, comprehensive group of blood chemicals 80053

A comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.

14 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.

14 services14 patients

Blood test, basic group of blood chemicals (calcium, total) 80048

A basic group blood test measures the levels of certain chemicals in your blood, including calcium. This helps assess your overall health and detect potential problems. The procedure involves drawing a small amount of blood from your arm, which is then analyzed in a lab.

13 services13 patients

Detection test by nucleic acid for strep (streptococcus, group a), amplified probe technique 87651

This test detects Group A Streptococcus bacteria in your body. It uses an amplified probe technique, which amplifies the bacteria's nucleic acid, making it easier to identify. This test helps diagnose conditions like strep throat or scarlet fever.

13 services13 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

11 services11 patients

Hospital Affiliations CMS Care Compare

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

Methodist Hospitals Inc

Acute Care Hospitals · Gary, IN

1/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number150002

Location600 Grant StGary, IN 46402 · Lake County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 46402 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

$82.04 typical visit price

range $53.07 – $161.76

Typical copayment $20.51 (range $13.26 – $40.44)

Most-billed visit code 99203

Established Patient

$94.22 typical visit price

range $16.93 – $132.22

Typical copayment $23.55 (range $4.23 – $33.05)

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

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

EVAN MINGER PA-C

Physician Assistant

600 GRANT STREET
GARY, IN 46402

Lake County (219) 886-4000

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 Thessa Robertson's NPI number?

The NPI number for Thessa Robertson is 1851332514. It was assigned to this individual provider in the NPPES registry on June 10, 2006.

Where is Thessa Robertson located?

Thessa Robertson practices at 600 Grant Street, Gary, IN 46402. The listed phone number is (219) 886-4601.

What is Thessa Robertson's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Thessa Robertson enrolled in Medicare?

Yes. Thessa Robertson 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 Thessa Robertson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thessa Robertson reassigns Medicare benefits to 3 organizations: Cep America LLC (Gary, IN), Advocate Health & Hospitals Corporation (Oak Lawn, IL) and Dupage Medical Group Ltd (Downers Grove, IL). 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 Thessa Robertson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Thessa Robertson affiliated with any hospitals?

According to CMS data, Thessa Robertson is affiliated with Methodist Hospitals Inc.

When was this NPI record last updated?

The NPPES record for Thessa Robertson was last updated on April 8, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.