Dr. Joseph Patrick Horowitz , MD
Internal Medicine โข Chicago, IL
1740 W Taylor St
Chicago, IL 606127232
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Joseph Horowitz is listed in NPPES under Internal Medicine.
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NPI assigned on March 30, 2020; this date does not establish years in practice.
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Published CMS data list 11 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99223 โ Initial hospital care with moderate level of medical decision making: 11 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
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Published CMS data list 33 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Atorvastatin Calcium โ 21 prescription fills, including refills.
- Gabapentin โ 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table ยท Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 95% of clinicians listed under Internal Medicine in Chicago, IL (2024, 1,008 clinicians with data). Median for this group: 406. Middle half: 157 to 820.
Fewer Medicare Part B services than 95% of clinicians listed under Internal Medicine in Illinois (2024, 3,249 clinicians with data). Median for this group: 699. Middle half: 285 to 1,340.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 31 in 2021 to 33 in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2021โ2024.
Practice Location & Contact Primary Location
1740 W Taylor St
Chicago, IL 606127232
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
15 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $1,968 in 2024
The total amount Medicare approved for these services in 2024. 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, 2024.
Paid by Medicare
About $1,568 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, 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, 2024.
30-day fills
64 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
$441 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.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019โ2025.
NPI first issued
2020
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, โDoes your provider accept Medicare as full payment?โ
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.
Enrolled in Medicare (PECOS)
Dr. Horowitz 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.
Can order Medicare-covered services
CMS lists Dr. Horowitz as eligible to order or refer durable medical equipment (DME) 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.
Compared with the same specialty in Chicago and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 95% of clinicians listed under Internal Medicine in Chicago, IL (2024, 1,008 clinicians with data). Median for this group: 406. Middle half: 157 to 820.
Fewer Medicare Part B services than 95% of clinicians listed under Internal Medicine in Illinois (2024, 3,249 clinicians with data). Median for this group: 699. Middle half: 285 to 1,340.
Medicare-allowed amount
A lower Medicare-allowed amount than 95% of clinicians listed under Internal Medicine in Chicago, IL (2024, 1,008 clinicians with data). Median for this group: $41,573. Middle half: $14,662 to $79,189.
A lower Medicare-allowed amount than 95% of clinicians listed under Internal Medicine in Illinois (2024, 3,249 clinicians with data). Median for this group: $67,802. Middle half: $27,619 to $124,679.
Paid by Medicare
A lower Medicare payment amount than 95% of clinicians listed under Internal Medicine in Chicago, IL (2024, 1,008 clinicians with data). Median for this group: $31,519. Middle half: $10,954 to $62,185.
A lower Medicare payment amount than 95% of clinicians listed under Internal Medicine in Illinois (2024, 3,249 clinicians with data). Median for this group: $52,838. Middle half: $21,117 to $98,214.
Medicare Part D prescriptions
Fewer Part D prescriptions than 80% 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.
Fewer Part D prescriptions than 85% of 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 lower Part D drug cost than 80% 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 lower Part D drug cost than 85% 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.
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.
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Medicare Part B services
CMS data for Medicare Part B services are available for 2024 only.
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Medicare-allowed amount
CMS data for Medicare-allowed amount are available for 2024 only.
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Paid by Medicare
CMS data for Medicare payment amount are available for 2024 only.
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Medicare Part D prescriptions
Medicare Part D prescriptions varied from year to year: 31 in 2021 and 33 in 2024.
- 2021: 31
- 2022: 63
- 2023: 83
- 2024: 33
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30-day fills
30-day fills increased 52% from 42 in 2021 to 64 in 2024.
- 2021: 42
- 2022: 118
- 2023: 141
- 2024: 64
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Part D drug cost
Part D drug cost went from $349 in 2021 to $441 in 2024.
- 2021: $349
- 2022: $844
- 2023: $8,994
- 2024: $441
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (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.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2023 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, 2024; 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 |
|---|---|---|---|---|
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99223
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
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11 | 11 | $1138.00 | $178.87 |
Source: CMS Part B by Provider and Service, 2024; 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.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 21 | 1,104 | $209.11 | โ |
| Gabapentin | Gabapentin | 12 | 810 | $232.15 | โ |
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: 2024-09-17NUCC Taxonomy Code: 207R00000X
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.
NUCC Taxonomy Code: 208000000X
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20240709003951
IL
5991123739
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.), Master of Public Health, MAT
Student in an Organized Health Care Education/Training Program
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Osteopathic Medicine (D.O.)
Family Medicine
Doctor of Medicine (M.D.)
Internal Medicine - Endocrinology, Diabetes & Metabolism
Doctor of Medicine (M.D.)
Obstetrics & Gynecology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Pediatrics (license number reported to NPPES: IL 036162851)
NPI status registered as active in NPPES database
Registered at 1740 W TAYLOR ST, CHICAGO, IL 606127232 (Tel: 8666002273)
Registered at 840 S WOOD ST, UIC INTERNAL MED/PEDIATRICS RESIDENCY RM 1424S (MC 856), CHICAGO, IL 606124325 (Tel: 3124133803)
Recorded as JOSEPH HOROWITZ, MD
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Chicago
- Julie Oyler
- Dr. Francisco Martinez-Rodriguez, MD
- Dr. Anita Mysliwiec, MD
- Dr. Chadwick Milstead, MD
- Dr. Joshua Ibarra, DO
- Dr. Ananth Honasoge, MD
Mailing Address
840 S Wood St, Uic Internal Med/pediatrics Residency Rm 1424s (Mc 856)
Chicago, IL 606124325
Phone: 3124133803