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MELISSA JINJU BAK
NPI 1609488386
Internal Medicine in Chicago, IL

Active since August 23, 2020PECOS Enrolled
240 E HURON ST STE 1-200, CHICAGO, IL 60611(312) 503-7975 Get Directions Write a Review

NPPES record last updated: June 23, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jun 23, 2025, Aug 23, 2020 (2 updates tracked since 2020).

About Melissa Jinju Bak NPPES

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

MELISSA JINJU BAK (NPI 1609488386) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (125085685) and active in the NPI registry since August 2020. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1609488386
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameMELISSA JINJU BAK
Location Address240 E HURON ST STE 1-200Chicago, IL 60611-2909
Mailing Address240 E Huron St Ste 1-200Chicago, IL 60611-2909 · (312) 503-7975
Phone(312) 503-7975
Sole ProprietorNo
Enumeration DateAugust 23, 2020
Last NPPES UpdateJune 23, 20252 updates tracked since enumeration
NPPES CertifiedJune 23, 2025
✔ NPI 1609488386 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 · 125085685
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.
240 E HURON ST STE 1-200, Chicago, IL 60611
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Melissa Jinju Bak is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60611 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.

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.

CLAYTON LYONS
Student in an Organized Health Care Education/Training Program
240 E HURON ST STE 1-200
CHICAGO, IL 60611
Cook County (412) 926-8985
BRIAN LEE
Student in an Organized Health Care Education/Training Program
240 E HURON ST STE 1-200
CHICAGO, IL 60611
Cook County (312) 503-7975
KATHERINE FIONA SIMPSON
Student in an Organized Health Care Education/Training Program
240 E HURON ST STE 1-200
CHICAGO, IL 60611
Cook County (312) 503-7975
ANYA DHAR
Student in an Organized Health Care Education/Training Program
240 E HURON ST STE 1-200
CHICAGO, IL 60611
Cook County (312) 503-7975
MR. CADE FREDERICK BENNETT
Student in an Organized Health Care Education/Training Program
240 E HURON ST STE 1-200
CHICAGO, IL 60611
Cook County (312) 503-7975
NIRAJ VINAYAK LAWANDE
Student in an Organized Health Care Education/Training Program
240 E HURON ST STE 1-200
CHICAGO, IL 60611
Cook County (312) 503-7975
JUSTIN WANG
Student in an Organized Health Care Education/Training Program
240 E HURON ST STE 1-200
CHICAGO, IL 60611
Cook County (312) 503-7975
CALVIN THOMAS HAWE
Student in an Organized Health Care Education/Training Program
240 E HURON ST STE 1-200
CHICAGO, IL 60611
Cook County (312) 503-7975

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 Melissa Bak's NPI number?

The NPI number for Melissa Bak is 1609488386. It was assigned to this individual provider in the NPPES registry on August 23, 2020.

Where is Melissa Bak located?

Melissa Bak practices at 240 E Huron St Ste 1-200, Chicago, IL 60611. The listed phone number is (312) 503-7975.

What is Melissa Bak's specialty?

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

Is Melissa Bak enrolled in Medicare?

Yes. Melissa Bak is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Melissa Bak was last updated on June 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.