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DIDEM SAYGIN M.D.
NPI 1861929564
Internal Medicine - Rheumatology in Chicago, IL

Active since May 12, 2017PECOS EnrolledAccepts Medicare Assignment
77.5/100
CMS Quality Rating
1611 W HARRISON ST STE 510, CHICAGO, IL 60612(312) 563-2800(312) 563-2075 Get Directions Write a Review

NPPES record last updated: January 16, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jan 16, 2026, Dec 17, 2025, Jul 16, 2022 and 3 more (6 updates tracked since 2017).

About Didem Saygin M.d. NPPES

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

DIDEM SAYGIN M.D. (NPI 1861929564) is an individual rheumatology provider in Chicago, Illinois, licensed in Illinois (036.152058) and active in the NPI registry since May 2017. She is enrolled in Medicare PECOS, is affiliated with Rush Oak Park Hospital, and is a graduate of Other (2014).

NPPES Registry Identity

NPI1861929564
Entity TypeIndividualFemale
Primary Taxonomy207RR0500X
Provider Legal NameDIDEM SAYGINCredential: M.D.
Location Address1611 W HARRISON ST STE 510Chicago, IL 60612-4861
Mailing Address1611 W Harrison St Ste 510Chicago, IL 60612-4861 · (312) 563-2800 · Fax (312) 563-2075
Phone(312) 563-2800
Fax(312) 563-2075
Sole ProprietorNo
Medical School CMSOtherGraduated 2014
Enumeration DateMay 12, 2017
Last NPPES UpdateJanuary 16, 20266 updates tracked since enumeration
NPPES CertifiedJanuary 16, 2026
✔ NPI 1861929564 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
License✔ Licensed in IL · 036.152058
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.
1611 W HARRISON ST STE 510, Chicago, IL 60612
Open in Google Maps ↗

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

Didem Saygin 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 ID3476821943
PECOS Enrollment IDI20240528002703
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

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.

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
29 services29 patients

Hospital Affiliations CMS Care Compare 2

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

Rush Oak Park Hospital

Acute Care Hospitals · Oak Park, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140063
Location520 S Maple AveOak Park, IL 60304 · Cook County
Emergency services

Rush University Medical Center

Acute Care Hospitals · Chicago, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140119
Location1653 West Congress ParkwayChicago, IL 60612 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60612 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.

77.5/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality68.61
Promoting Interoperability100
Improvement Activities40
Cost56.4

Other Providers at the Same Location NPPES 5

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

WENLU WENDY XIONG M.D.
Internal Medicine (Rheumatology)
1611 W HARRISON ST STE 510
CHICAGO, IL 60612
Cook County (312) 563-2800
MIDWEST PODIATRY SERVICES LTD
Durable Medical Equipment & Medical Supplies
1611 W HARRISON ST STE 510
CHICAGO, IL 60612
Cook County (847) 390-7666
DR. JEFFERY H ALEXANDER DPM
Podiatrist (Foot & Ankle Surgery)
1611 W HARRISON ST STE 510
CHICAGO, IL 60612
Cook County (847) 390-7666
CARRIE L RICHARDSON M.D.
Internal Medicine (Rheumatology)
1611 W HARRISON ST STE 510
CHICAGO, IL 60612
Cook County (312) 563-2800
CASEY THOMAS AMAN MD
Internal Medicine (Rheumatology)
1611 W HARRISON ST STE 510
CHICAGO, IL 60612
Cook County (312) 942-4256

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 Didem Saygin's NPI number?

The NPI number for Didem Saygin is 1861929564. It was assigned to this individual provider in the NPPES registry on May 12, 2017.

Where is Didem Saygin located?

Didem Saygin practices at 1611 W Harrison St Ste 510, Chicago, IL 60612. The listed phone number is (312) 563-2800.

What is Didem Saygin's specialty?

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

Is Didem Saygin enrolled in Medicare?

Yes. Didem Saygin 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 Didem Saygin accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list Didem Saygin 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 Didem Saygin affiliated with any hospitals?

According to CMS data, Didem Saygin is affiliated with Rush Oak Park Hospital and Rush University Medical Center.

When was this NPI record last updated?

The NPPES record for Didem Saygin was last updated on January 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.