LYDIA E. ISSAC M.D. – NPI #1679953954
Internal Medicine

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.

Health Care Provider Taxonomy Code for Internal Medicine

LYDIA ISSAC is a physician located in CHICAGO, IL. NPPES has assigned the NPI number 1679953954 to LYDIA ISSAC on June 02, 2015. It is a Type-1 NPI, indicating this NPI number is associated with an individual. The primary taxonomy selected by this provider is 207RC0000X from the Health Care Provider Taxonomy code set, which is classified as Internal Medicine, specializing in Cardiovascular Disease

The NPI profile was last updated on Sep 02, 2025. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for LYDIA ISSAC below.

NPI Profile for
LYDIA E. ISSAC

NPI Number
1679953954
Enumeration Date

(more than 11 years ago)
Entity Type
Type-1  Individual (Female)
Legal Name
LYDIA E. ISSAC
Credentials
M.D.
Primary location
2535 SOUTH MARTIN LUTHER KING DRIVE
CHICAGO, IL 60616
Phone: (312) 842-7117 Fax: (312) 326-2102
1 Other location(s):
9831 S Western Ave
Chicago, IL 60643-1740
Phone: (773) 445-3500
Fax: (773) 445-1285
Mailing address
29373 NETWORK PL
CHICAGO, IL 60673-1293
Phone: (847) 390-5900 Fax:
Sole Proprietor
No
Updated
Certification Date
Sep 02, 2025

Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.

Taxonomy Code(s)

A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.

Taxonomy Classification / Specialization State License
207RC0000X
- Internal Medicine / Cardiovascular Disease (Primary)		 IL 036-156634

The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.

Endpoint

Health Information Exchange (HEI)

HEI is the mobilization of health care information electronically across organizations within a region, community or hospital system. Endpoints provide a simple and secure way for participants to send authenticated, encrypted health information directly to known, trusted recipients over the internet such as primary care physicians, specialists, hospitals, labs, etc.

View All Endpoint(s)
Endpoint
[email protected]
Endpoint type
Direct Messaging Address
Endpoint Description
Content Type
Affiliation
N
Endpoint Location
2535 S MARTIN LUTHER KING JR DRIVE,
CHICAGO, IL 77025-1669
Endpoint
[email protected]
Endpoint type
Direct Messaging Address
Endpoint Description
Content Type
CSV
Affiliation
N
Endpoint Location
2535 S MARTIN LUTHER KING JR DRIVE,
CHICAGO, IL 77025-1669
Endpoint
https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/
Endpoint type
FHIR URL
Endpoint Description
Content Type
Affiliation
N
Endpoint Location
2535 S MARTIN LUTHER KING JR DRIVE,
CHICAGO, IL 77025-1669

Additional Information

Accepts Medicare
This provider accepts Medicare-approved amount as payment in full. The Medicare-approved amount is the total the provider can be paid. When a provider accepts the Medicare-approved amount as payment, you won't be billed for more than the Medicare deductible & coinsureance.
Medicare Ordering & Referring
Provider can:
  • Refer to Part B
  • Order Durable Medical Equipment
  • Refer to Home Health Agency
  • Order Power Mobility Devices
Affiliations
LYDIA ISSAC is affiliated with the following medical group(s):
  • HOSPITAL
    • ADVOCATE CHRIST HOSPITAL & MEDICAL CENTER
      4440 W 95TH STREET
      OAK LAWN, IL 60453
    • ADVOCATE TRINITY HOSPITAL
      2320 E 93RD ST
      CHICAGO, IL 60617

Why is my NPI data (personal information) being displayed publicly?
If you have an active NPI profile, your profile is required to be disclosed according to the FOIA and eFOIA. HIPAA also requires covered providers to share their NPI with other providers, health plans, clearinghouses and any entity that may need it for billing purposes.

How do I correct or change the NPI data displayed here?
At any time, providers can make changes to their NPI profile at NPPES. Login to NPPES to make changes online or call (800) 465-3203 for assistance. Changes made at NPPES will be reflected on this web site within a few days.

Can I hide my NPI profile from the public?
Unfortunately, No. The NPPES discloses health care provider data under the Freedom of Information Act to the public, which means anyone may request such information directly from the National Plan & Provider Enumeration System. See the complete CMS Data Dissemination Notice here.