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DR. BOB SUN M.D.
NPI 1679657944
Internal Medicine - Rheumatology in Evanston, IL

Active since October 24, 2006PECOS EnrolledAccepts Medicare Assignment
93.08/100
CMS Quality Rating
1000 CENTRAL ST STE 800, EVANSTON, IL 60201(847) 570-2503(847) 570-1123 Get Directions Write a Review

NPPES record last updated: February 10, 2021. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Feb 10, 2021, Oct 29, 2018 (2 updates tracked since 2018).

About Dr. Bob Sun M.d. NPPES

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

DR. BOB SUN M.D. (NPI 1679657944) is an individual rheumatology provider in Evanston, Illinois, licensed in Illinois (036118325) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and is a graduate of University Of Miami, Lm Miller School Of Medicine (2001).

NPPES Registry Identity

NPI1679657944
Entity TypeIndividualMale
Primary Taxonomy207RR0500X
Provider Legal NameDR. BOB SUNCredential: M.D.
Location Address1000 CENTRAL ST STE 800Evanston, IL 60201-1780
Mailing Address1000 Central St Ste 800Evanston, IL 60201-1780 · (847) 570-2503 · Fax (847) 570-1123
Phone(847) 570-2503
Fax(847) 570-1123
Sole ProprietorNo
Medical School CMSUniversity Of Miami, Lm Miller School Of MedicineGraduated 2001
Enumeration DateOctober 24, 2006
Last NPPES UpdateFebruary 10, 20212 updates tracked since enumeration
NPPES CertifiedFebruary 10, 2021
✔ NPI 1679657944 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
License✔ Licensed in IL · 036118325
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
Also ListedInternal MedicineTaxonomy 207R00000X · License 036118325 (IL)
1000 CENTRAL ST STE 800, Evanston, IL 60201
Open in Google Maps ↗

Other Names 1

Other Name (5)Bob Hol-ting Sun Md

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Bob Sun M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2567424948
PECOS Enrollment IDI20070713000472
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.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
334 services190 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
277 services156 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
75 services52 patients
Online digital evaluation and management service for an established patient for up to 7 days, total time 5-10 minutes 99421
This service involves a week-long digital assessment of your health status. It's conducted online by your healthcare provider, focusing on managing your existing health condition. The process takes 5-10 minutes of your time daily, ensuring optimal health management.
69 services34 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
67 services45 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
22 services22 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northshore University Healthsystem - Evanston Hospital

Acute Care Hospitals · Evanston, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number140010
Location2650 Ridge AveEvanston, IL 60201 · Cook County
Emergency services Birthing friendly

Swedish Hospital

Acute Care Hospitals · Chicago, IL
2/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140114
Location5145 N California AveChicago, IL 60625 · Cook County
Emergency services Birthing friendly

Northwest Community Hospital 1

Acute Care Hospitals · Arlington Heights, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140252
Location800 W Central RoadArlington Heights, IL 60005 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60201 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

93.08/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality80.79
Promoting Interoperability100
Improvement Activities40

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.

LESLIE S. FINKEL MD
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
1000 CENTRAL ST STE 800
EVANSTON, IL 60201
Cook County (847) 570-2577
CHRISTINA BOUTSICARIS MD
Internal Medicine (Rheumatology)
1000 CENTRAL ST STE 800
EVANSTON, IL 60201
Cook County (847) 570-1122
STUART M SPRAGUE DO
Internal Medicine (Nephrology)
1000 CENTRAL ST STE 800
EVANSTON, IL 60201
Cook County (847) 570-2512
FARHAN ABDUL QUADER MD
Internal Medicine (Gastroenterology)
1000 CENTRAL ST STE 800
EVANSTON, IL 60201
Cook County (847) 657-1900
LILIANA OSADCHUK M.D.
Internal Medicine (Nephrology)
1000 CENTRAL ST STE 800
EVANSTON, IL 60201
Cook County (847) 570-2512
DR. MARY ELLEN ACREE M.D.
Internal Medicine (Infectious Disease)
1000 CENTRAL ST STE 800
EVANSTON, IL 60201
Cook County (847) 657-5959
DR. BLAKE ANTHONY JONES M.D.
Internal Medicine (Gastroenterology)
1000 CENTRAL ST STE 800
EVANSTON, IL 60201
Cook County (847) 657-1900
DR. JENNIFER L. GRANT M.D.
Internal Medicine (Infectious Disease)
1000 CENTRAL ST STE 800
EVANSTON, IL 60201
Cook County (847) 657-5959

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 Bob Sun's NPI number?

The NPI number for Bob Sun is 1679657944. It was assigned to this individual provider in the NPPES registry on October 24, 2006. The provider is also known as Bob Hol-Ting Sun MD.

Where is Bob Sun located?

Bob Sun practices at 1000 Central St Ste 800, Evanston, IL 60201. The listed phone number is (847) 570-2503.

What is Bob Sun's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Bob Sun enrolled in Medicare?

Yes. Bob Sun is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Bob Sun accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list Bob Sun as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Bob Sun affiliated with any hospitals?

According to CMS data, Bob Sun is affiliated with Northshore University Healthsystem - Evanston Hospital, Swedish Hospital and Northwest Community Hospital 1.

When was this NPI record last updated?

The NPPES record for Bob Sun was last updated on February 10, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.