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DR. MARK C CHIEN M.D.
NPI 1356374383
Internal Medicine in Chicago, IL

Active since July 10, 2006Opted out of Medicare · through Jul 1, 2027CLIA 14D1059043 · Waiver
680 N LAKE SHORE DR, SUITE 118, CHICAGO, IL 60611(312) 503-6000(312) 503-6329 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Mark C Chien M.d. NPPES

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

DR. MARK C CHIEN M.D. (NPI 1356374383) is an individual internal medicine provider in Chicago, Illinois and active in the NPI registry since July 2006. He has opted out of Medicare through July 1, 2027 and remains eligible to order and refer and holds a CLIA Waiver certificate valid through September 19, 2026.

NPPES Registry Identity

NPI1356374383
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. MARK C CHIENCredential: M.D.
Location Address680 N LAKE SHORE DR, SUITE 118Chicago, IL 60611-4546
Mailing Address680 N Lake Shore Dr, Suite 118Chicago, IL 60611-4546 · (312) 503-6000 · Fax (312) 503-6329
Phone(312) 503-6000
Fax(312) 503-6329
Sole ProprietorYes
Enumeration DateJuly 10, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1356374383 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
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.
680 N LAKE SHORE DR, 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

ⓘ

Opted out of Medicare

Dr. Mark C Chien 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 July 1, 2021 through July 1, 2027.

Opt-Out Effective DateJuly 1, 2021
Opt-Out In Effect ThroughJuly 1, 2027Opt-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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 14D1059043

Mark Chien M D L L C · Chicago, IL
Active · expires Sep 19, 2026
CLIA Number14D1059043
Laboratory TypePhysician Office
Certificate Effective DateSeptember 20, 2024
Certificate Expiration DateSeptember 19, 2026
Laboratory DirectorMark C. Chien
Laboratory Phone(312) 503-6000
Laboratory LocationMark Chien M D L L C680 N Lake Shore Drive, Suite 118, Chicago, IL 60611
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

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.

Referred Medical Equipment & Supplies CMS DME claims

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
7 suppliers16 claims36 services$4.79 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.

MRS. BONNIE DEVROE MALIK CRNA
Nurse Anesthetist, Certified Registered
680 N LAKE SHORE DR, SUITE 1000
CHICAGO, IL 60611
Cook County (312) 695-9797
IMG MD, LLC
Medical Genetics, Ph.D. Medical Genetics
680 N LAKE SHORE DR
CHICAGO, IL 60611
Cook County (312) 981-4400
DR. JAY MICHAEL PENSLER M.D.
Specialist
680 N LAKE SHORE DR, SUITE 1125
CHICAGO, IL 60611
Cook County (312) 642-7777
JAY PRYSTOWSKY MD
Surgery
680 N LAKE SHORE DR, SUITE 1000
CHICAGO, IL 60611
Cook County (312) 695-9797
ANURADHA PERNI MD
Anesthesiology (Pain Medicine)
680 N LAKE SHORE DR, SUITE 1000
CHICAGO, IL 60611
Cook County (312) 695-9797
GYNECOLOGIC SPECIALISTS OF NORTHWESTERN, S.C.
Obstetrics & Gynecology (Gynecology)
680 N LAKE SHORE DR, SUITE117
CHICAGO, IL 60611
Cook County (312) 654-1166
DR. LEANNE TRAPP BENSKO M.D.
Pediatrics
680 N LAKE SHORE DR, 1050
CHICAGO, IL 60611
Cook County (312) 642-5515
DR. JULIA GOLDIN DNP
Nurse Practitioner (Family)
680 N LAKE SHORE DR
CHICAGO, IL 60611
Cook County (312) 965-6868

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 Mark Chien's NPI number?

The NPI number for Mark Chien is 1356374383. It was assigned to this individual provider in the NPPES registry on July 10, 2006.

Where is Mark Chien located?

Mark Chien practices at 680 N Lake Shore Dr Suite 118, Chicago, IL 60611. The listed phone number is (312) 503-6000.

What is Mark Chien's specialty?

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

Is Mark Chien enrolled in Medicare?

No. Mark Chien has opted out of Medicare through July 1, 2027. 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.

Does Mark Chien hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 14D1059043) is associated with this NPI, valid through September 19, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Mark Chien was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years 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.