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Dr. Robert Todd Hargan , MD

Internal Medicine โ€ข Chicago, IL

Active NPI 1962591404 Individual Practitioner Male Practitioner
Practice location in NPPES

3245 N Halsted St
Chicago, IL 606573419

Call 7733881600 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

3245 N Halsted St

Chicago, IL 606573419

Telephone 7733881600
Before You Book

Paying without insurance? Prepare a cost-estimate request

Ask about interpreters and office accessibility

Organization at the Same NPPES Address or Phone
Howard Brown Health Center Facility NPI 1154856870

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

NPPES lists 1 additional practice-address record in Chicago, IL. See the list

Source: CMS NPPES NPI Registry, practice location records; release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

What Public CMS Data Show

These CMS figures cover limited populations and published records; they are not quality ratings or medical advice.

Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.

Medicare-allowed amount

About $22,249 in 2017

The total amount Medicare approved for these services in 2017. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.

What this does not show: Medicare-allowed amount

This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2017.

Paid by Medicare

About $15,752 in 2017

The part of the Medicare-allowed amount that Medicare itself paid in 2017, after patients' deductibles and coinsurance.

The gap between the allowed amount and this number is roughly what patients and their other insurance paid.

What this does not show: Paid by Medicare

This is not the clinician's income and not a measure of quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2017.

30-day fills

1,802 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$1,564,145 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

It shows the total spending on drugs this clinician prescribed, not what any one patient paid.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers โ€“ by Provider and Drug, 2024.

Open Payments general payments, program year 2024

All general payments: $1,669.22 across 78 records.

By nature of payment

  • Food and Beverage: $1,636.95 across 77 records.
  • Education: $32.27 across 1 record.

Reporting-company totals (3 largest of 12)

  • Gilead Sciences, Inc.: $416.22 across 19 records.
  • ViiV Healthcare Company: $268.72 across 14 records.
  • Napo Pharmaceuticals Inc: $211.17 across 9 records.

A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2024 (published June 30, 2026).

Guide: How to read an Open Payments record

NPI first issued

2006

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Medicare assignment not listed

CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, โ€œDoes your provider accept Medicare as full payment?โ€

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Hargan has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Hargan as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

Medicare pays for these items and services only when they are ordered by an eligible clinician.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Chicago and Illinois

Billing and prescribing volume is not a quality rating.

Medicare Part D prescriptions

More Part D prescriptions than 60% of clinicians listed under Internal Medicine in Chicago, IL (2024, 1,269 clinicians with data). Median for this group: 474. Middle half: 74 to 2,358.

Close to the middle for clinicians listed under Internal Medicine in Illinois (2024, 3,755 clinicians with data). Median for this group: 1,030. Middle half: 99 to 4,658.

Part D drug cost

A higher Part D drug cost than 95% of clinicians listed under Internal Medicine in Chicago, IL (2024, 1,269 clinicians with data). Median for this group: $40,678. Middle half: $1,543 to $232,098.

A higher Part D drug cost than 95% of clinicians listed under Internal Medicine in Illinois (2024, 3,755 clinicians with data). Median for this group: $78,716. Middle half: $2,604 to $371,507.

Medicare Part B

Comparisons use 2024 data. The latest CMS data for Dr. Hargan are from 2017.

2,870 active clinicians are listed under Internal Medicine with a practice address in Chicago, IL (7,245 in Illinois).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Chicago

13.3% of these 2,870 clinicians have the CMS telehealth indicator.

38.5% of these 2,870 clinicians are listed by CMS as accepting Medicare assignment.

CMS data by year

Changes may reflect reporting, coverage or privacy limits, not changes in care quality.

  • Medicare Part B services

    CMS data for Medicare Part B services are available for 2017 only.

  • Medicare-allowed amount

    CMS data for Medicare-allowed amount are available for 2017 only.

  • Paid by Medicare

    CMS data for Medicare payment amount are available for 2017 only.

  • Medicare Part D prescriptions

    Medicare Part D prescriptions decreased 22% from 1,361 in 2020 to 1,068 in 2024.

    • 2020: 1,361
    • 2021: 1,199
    • 2022: 1,401
    • 2023: 1,395
    • 2024: 1,068

  • 30-day fills

    30-day fills stayed about the same: 1,965 in 2020 and 1,802 in 2024.

    • 2020: 1,965
    • 2021: 1,909
    • 2022: 2,374
    • 2023: 2,386
    • 2024: 1,802

  • Part D drug cost

    Part D drug cost increased 19% from $1,312,384 in 2020 to $1,564,145 in 2024.

    • 2020: $1,312,384
    • 2021: $1,138,982
    • 2022: $1,794,704
    • 2023: $1,766,022
    • 2024: $1,564,145

  • Industry payments (Open Payments)

    Industry payments (Open Payments) decreased 11% from $1,871.29 in 2020 to $1,669.22 in 2024.

    • 2020: $1,871.29
    • 2021: $2,702.08
    • 2022: $2,895.34
    • 2023: $3,766.16
    • 2024: $1,669.22

Sources: CMS Medicare Physician & Other Practitioners (2017), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo ยท Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments ยท Program Year 2024
Disclosure Year:

Program year 2024 (payments made January 1 โ€“ December 31, 2024): 78 records totaling $1,669.22.

Manufacturer Payment Nature Product Type Amount ($)
Napo Pharmaceuticals Inc
Food and Beverage
Cash or cash equivalent
 Mytesi General $35.00
ViiV Healthcare Company
Food and Beverage
In-kind items and services
 DOVATO General $34.17
Merck Sharp & Dohme LLC
Food and Beverage
In-kind items and services
 PIFELTRO General $33.48
Gilead Sciences, Inc.
Food and Beverage
In-kind items and services
 โ€” General $33.44
ViiV Healthcare Company
Food and Beverage
In-kind items and services
 DOVATO General $33.08
Merck Sharp & Dohme LLC
Food and Beverage
In-kind items and services
 PIFELTRO General $32.84
Gilead Sciences, Inc.
Food and Beverage
In-kind items and services
 โ€” General $32.74
Gilead Sciences, Inc.
Food and Beverage
In-kind items and services
 โ€” General $32.64
Gilead Sciences, Inc.
Food and Beverage
In-kind items and services
 โ€” General $32.44
Novo Nordisk Inc
Education
In-kind items and services
 Ozempic General $32.27
Merck Sharp & Dohme LLC
Food and Beverage
In-kind items and services
 PIFELTRO General $31.41
Gilead Sciences, Inc.
Food and Beverage
In-kind items and services
 โ€” General $30.20
ViiV Healthcare Company
Food and Beverage
In-kind items and services
 DOVATO General $29.96
Napo Pharmaceuticals Inc
Food and Beverage
Cash or cash equivalent
 Mytesi General $29.60
Gilead Sciences, Inc.
Food and Beverage
In-kind items and services
 โ€” General $29.51
Theratechnologies Inc.
Food and Beverage
In-kind items and services
 EGRIFTA General $29.16
Theratechnologies Inc.
Food and Beverage
In-kind items and services
 EGRIFTA General $29.07
Napo Pharmaceuticals Inc
Food and Beverage
Cash or cash equivalent
 Mytesi General $28.67
Janssen Pharmaceuticals, Inc
Food and Beverage
In-kind items and services
 SPRAVATO General $28.53
Merck Sharp & Dohme LLC
Food and Beverage
In-kind items and services
 PIFELTRO General $28.28
ABBVIE INC.
Food and Beverage
In-kind items and services
 MAVYRET General $27.82
Gilead Sciences, Inc.
Food and Beverage
In-kind items and services
 โ€” General $27.80
Gilead Sciences, Inc.
Food and Beverage
In-kind items and services
 โ€” General $27.45
Gilead Sciences, Inc.
Food and Beverage
In-kind items and services
 โ€” General $27.13
Napo Pharmaceuticals Inc
Food and Beverage
Cash or cash equivalent
 Mytesi General $26.64

(top 25 shown)

Source: CMS Open Payments, program year 2024, released June 30, 2026.

A reported payment does not necessarily indicate wrongdoing; clinicians can dispute a record with CMS.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2017.

CMS Part B ยท Data Year 2017

CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ€“ by Provider and Service data, 2017; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

HCPCS Code Services Patients Submitted Charge Medicare Allowed
J1071 Injection, testosterone cypionate, 1 mg
19,059 12 $0.09 $0.02
96372 Injection of drug or substance under skin or into muscle
179 19 $61.26 $26.55
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
151 37 $234.99 $107.98
36415 Insertion of needle into vein for collection of blood sample
70 36 $12.00 $2.90
90674 Influenza vaccine, quadrivalent derived from cell cultures, preservative and antibiotic free
14 14 $25.00 $23.57
G0008 Administration of influenza virus vaccine
12 11 $23.88 $23.14

Source: CMS Part B by Provider and Service, 2017; services under 11 beneficiaries omitted by CMS. Privacy limits

Submitted charges are billed amounts, not a price quote for your visit.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D ยท Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Biktarvy Bictegrav/Emtricit/Tenofov Ala 157 5,190 $712,419.31 19
Atorvastatin Calcium Atorvastatin Calcium 102 7,500 $890.30 27
Descovy Emtricitabine/Tenofov Alafenam 86 2,580 $203,925.50 โ€”
Prezcobix Darunavir/Cobicistat 83 2,850 $260,755.86 โ€”
Isentress Raltegravir Potassium 41 1,470 $96,200.22 โ€”
Bupropion Xl Bupropion Hcl 40 2,460 $795.23 โ€”
Omeprazole Omeprazole 38 3,160 $483.29 14
Tamsulosin Hcl Tamsulosin Hcl 33 2,790 $872.45 12
Trazodone Hcl Trazodone Hcl 32 2,520 $740.26 โ€”
Pifeltro Doravirine 31 930 $58,113.90 โ€”
Testosterone Testosterone 28 850 $2,703.07 โ€”
Valacyclovir Valacyclovir Hcl 26 1,080 $586.11 โ€”
Tivicay Dolutegravir Sodium 26 780 $67,215.81 โ€”
Amlodipine Besylate Amlodipine Besylate 24 1,500 $172.71 โ€”
Lisinopril Lisinopril 23 2,040 $413.16 โ€”
Escitalopram Oxalate Escitalopram Oxalate 23 1,350 $221.64 โ€”
Pantoprazole Sodium Pantoprazole Sodium 19 1,470 $299.79 โ€”
Levothyroxine Sodium Levothyroxine Sodium 17 690 $120.57 โ€”
Zaleplon Zaleplon 17 510 $325.19 โ€”
Doxycycline Hyclate Doxycycline Hyclate 15 411 $532.26 โ€”
Pravastatin Sodium Pravastatin Sodium 15 1,347 $306.33 โ€”
Jardiance Empagliflozin 14 1,140 $20,549.52 โ€”
Etravirine Etravirine 14 600 $21,322.17 โ€”
Dexlansoprazole Dr Dexlansoprazole 14 960 $4,348.59 โ€”
Emtricitabine-Tenofovir Disop Emtricitabine/Tenofovir (Tdf) 13 510 $13,746.28 โ€”

(top 25 shown)

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2021-07-29
Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

License # reported to NPPES IL 0360941631

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.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Illinois Department of Financial and Professional Regulation.
Look Up on State Board Site

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid ID
0360941631 (IL)
Other Identifier Il Bcbs Provider #
01622085 (IL)

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - INTERNAL MEDICINE

Medicare Enrollment ID

I20100325000568

Enrollment State Jurisdiction

IL

PECOS Control ID

8729114012

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Secondary Practice Locations

2835 N Sheffield Ave, Suite 500

Chicago, IL 606575081

Phone: 7732962400

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

40 listed
NPI 1619401718

Master of Social Work, Master of Science, Physician Assistant (Certified)

NPI 1093100893

Doctor of Medicine (M.D.)

Milton Aguilar Dos Santos , PMHNP

Nurse Practitioner - Psychiatric/Mental Health

NPI 1487423281

Psychiatric-Mental Health Nurse Practitioner

Dr. Travis Amengual , MD

Psychiatry & Neurology - Psychiatry

NPI 1386147163

Doctor of Medicine (M.D.)

Dr. Corinne Blum , MD

Family Medicine

NPI 1699791400

Doctor of Medicine (M.D.)

Dr. Raj Chablani , MD

Psychiatry & Neurology - Psychiatry

NPI 1770894198

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

8 Historical Events
๐Ÿ“
Updated Practice Location July 29, 2021

Registered at 3245 N HALSTED ST, CHICAGO, IL 606573419 (Tel: 7733881600)

๐Ÿ“
Updated Business Mailing Address July 29, 2021

Registered at 3245 N HALSTED ST STE 500, CHICAGO, IL 606573419 (Tel: 7733881600)

โœ…
NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

๐Ÿ“
Practice Location (Initial Record) July 08, 2007

Registered at 2835 N SHEFFIELD AVE, SUITE 500, CHICAGO, IL 606575081 (Tel: 7732962400)

๐Ÿ“
Business Mailing Address (Initial Record) July 08, 2007

Registered at 2835 N SHEFFIELD AVE, SUITE 500, CHICAGO, IL 606575081 (Tel: 7732962400)

๐Ÿ‘ค
Provider Name / Credentials (Initial Record) July 08, 2007

Recorded as ROBERT HARGAN, M.D.

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Internal Medicine (license number reported to NPPES: IL 0360941631)

๐ŸŸข
Initial NPI Registration & Enumeration October 12, 2006

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1962591404
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: October 12, 2006
Last Update: July 29, 2021
Sole Proprietor: No
Update or Correct Profile

Other Internal Medicine Providers in Chicago

All Internal Medicine Providers in Chicago

Mailing Address

3245 N Halsted St Ste 500

Chicago, IL 606573419

Phone: 7733881600

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.