DR. JOSEPH J HENNESSY M.D.
NPI 1265407209
Internal Medicine in Chicago, IL

Q: What is Joseph Hennessy's NPI number?

The NPI number for Joseph Hennessy is 1265407209. It was assigned to this individual provider in the NPPES registry on February 22, 2006.

Q: What is Joseph Hennessy's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: Is Joseph Hennessy enrolled in Medicare?

No. Joseph Hennessy has opted out of Medicare through October 1, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

Q: When was this NPI record last updated?

The NPPES record for Joseph Hennessy was last updated on March 5, 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 February 22, 2006Opted out of Medicare · through Oct 1, 2026

1520 W HARRISON ST, CHICAGO, IL 60607(312) 942-3192 Get Directions Write a Review

NPPES record last updated: March 5, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

On this page

About Dr. Joseph J Hennessy M.d. NPPES

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

DR. JOSEPH J HENNESSY M.D. (NPI 1265407209) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (036082176) and active in the NPI registry since February 2006. He has opted out of Medicare through October 1, 2026 and remains eligible to order and refer and maintains a secondary practice location in Chicago.

NPPES Registry Identity

NPI1265407209

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. JOSEPH J HENNESSYCredential: M.D.

Location Address1520 W HARRISON STChicago, IL 60607-3106

Mailing Address1520 W Harrison StChicago, IL 60607-3106 · (312) 942-3192

Phone(312) 942-3192

Sole ProprietorYes

Enumeration DateFebruary 22, 2006

Last NPPES UpdateMarch 5, 2026

NPPES CertifiedMarch 5, 2026

✔ NPI 1265407209 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in IL · 036082176

Definition

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.

1520 W HARRISON ST, Chicago, IL 60607

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Secondary Practice Location 1

Location 1676 N Michigan Ave, Suite 3120Chicago, IL 60611-2883 · Phone (312) 780-2301 · Fax (312) 780-2304

Other Identifiers 1

Medicaid036082176IL

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Joseph J Hennessy M.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from October 1, 2008 through October 1, 2026.

Opt-Out Effective DateOctober 1, 2008

Opt-Out In Effect ThroughOctober 1, 2026Opt-out affidavits renew automatically every two years unless cancelled

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60607 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

$138.86 typical visit price

range $60.08 – $183.39

Typical copayment $34.71 (range $15.02 – $45.84)

Most-billed visit code 99204

Established Patient

$105.70 typical visit price

range $18.97 – $148.12

Typical copayment $26.42 (range $4.74 – $37.03)

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.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tacrolimus, immediate release, oral, 1 mg J7507

Treatment-Treatment - Miscellaneous · category RX029N

3 suppliers12 claims900 services$0.33 avg. paid by Medicare

Mycophenolic acid, oral, 180 mg J7518

Treatment-Treatment - Miscellaneous · category RX029N

3 suppliers12 claims720 services$0.99 avg. paid by Medicare

Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512

Treatment-Chemotherapy · category RH012N

2 suppliers19 claims19 services$12.63 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

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

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