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HARRY SIAVELIS M.D.
NPI 1255310736
Surgery in Elmhurst, IL

Active since January 12, 2006PECOS EnrolledAccepts Medicare Assignment
1200 S YORK RD, SUITE 4220, ELMHURST, IL 60126(630) 758-8838(630) 758-8846 Get Directions Write a Review

NPPES record last updated: August 22, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 22, 2023, Feb 14, 2020 (2 updates tracked since 2020).

About Harry Siavelis M.d. NPPES

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

HARRY SIAVELIS M.D. (NPI 1255310736) is an individual surgery provider in Elmhurst, Illinois, licensed in Illinois (036091964) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, is affiliated with Elmhurst Memorial Hospital, and is a graduate of Other (1993).

NPPES Registry Identity

NPI1255310736
Entity TypeIndividualMale
Primary Taxonomy208600000X
Provider Legal NameHARRY SIAVELISCredential: M.D.
Location Address1200 S YORK RD, SUITE 4220Elmhurst, IL 60126-5626
Mailing AddressPo Box 713260Chicago, IL 60677-1260 · (630) 469-9200
Phone(630) 758-8838
Fax(630) 758-8846
Sole ProprietorNo
Medical School CMSOtherGraduated 1993
Enumeration DateJanuary 12, 2006
Last NPPES UpdateAugust 22, 20232 updates tracked since enumeration
NPPES CertifiedAugust 22, 2023
✔ NPI 1255310736 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in IL · 036091964
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
1200 S YORK RD, Elmhurst, IL 60126
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Other Identifiers 2

Medicaid036091964IL
Other020050266Railroad Medicare

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Harry Siavelis 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 ID6204914484
PECOS Enrollment IDI20101022000675
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.

Medicare Billing Reassignment

Medicare enrollment records show Harry Siavelis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Dupage Medical Group Ltd
4.8 mi
Multi-Specialty
1100 W 31ST ST, STE 300
Downers Grove, IL 60515
  • Reassigned Medicare billing, Illinois enrollment
  • 1,061 clinicians in this Medicare group
NPI 1801833983 (630) 469-9200

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 11

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.
73 services73 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.
42 services37 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
31 services27 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
30 services30 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
24 services22 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.
23 services23 patients

Hospital Affiliations CMS Care Compare

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

Elmhurst Memorial Hospital

Acute Care Hospitals · Elmhurst, IL
4/5 CMS rating
OwnershipProprietary
CMS Certification Number140200
Location155 East Brush Hill RoadElmhurst, IL 60126 · Du Page County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60126 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
$93.02 typical visit price
range $59.81 – $181.38
Typical copayment $23.25 (range $14.95 – $45.34)
Most-billed visit code 99203
Established Patient
$74.38 typical visit price
range $19.15 – $147.12
Typical copayment $18.59 (range $4.78 – $36.78)
Most-billed visit code 99213
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.

DR C KALSI & ASSOCIATES PC
Obstetrics & Gynecology (Gynecology)
1200 S YORK RD, #4250
ELMHURST, IL 60126
Dupage County (630) 758-8750
DR H KALSI & ASSOCIATES P C
Family Medicine
1200 S YORK RD, STE 4250
ELMHURST, IL 60126
Dupage County (630) 758-8766
SCOTT J CINEL MD
Urology
1200 S YORK RD
ELMHURST, IL 60126
Dupage County (630) 941-2609
DR. RICHARD A BRASH M.D.
Orthopaedic Surgery (Sports Medicine)
1200 S YORK RD, SUITE 4250
ELMHURST, IL 60126
Dupage County (630) 758-8820
STEPHEN P. BOGHOSSIAN, M.D., P.C.
Surgery
1200 S YORK RD, SUITE 4240
ELMHURST, IL 60126
Dupage County (630) 834-7590
CVT SURGEONS, LTD.
Thoracic Surgery (Cardiothoracic Vascular Surgery)
1200 S YORK RD, SUITE 3290
ELMHURST, IL 60126
Dupage County (630) 516-9120
KARLA H PODRAZIK MD
Internal Medicine
1200 S YORK RD, 3250
ELMHURST, IL 60126
Dupage County (630) 758-8885
JOAO GABRIEL UBATUBA M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery)
1200 S YORK RD, SUITE 3290
ELMHURST, IL 60126
Dupage County (630) 516-9120

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 Harry Siavelis's NPI number?

The NPI number for Harry Siavelis is 1255310736. It was assigned to this individual provider in the NPPES registry on January 12, 2006.

Where is Harry Siavelis located?

Harry Siavelis practices at 1200 S York Rd Suite 4220, Elmhurst, IL 60126. The listed phone number is (630) 758-8838.

What is Harry Siavelis's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Harry Siavelis enrolled in Medicare?

Yes. Harry Siavelis 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.

Which organization bills Medicare for Harry Siavelis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Harry Siavelis reassigns Medicare benefits to Dupage Medical Group Ltd (Downers Grove, IL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Harry Siavelis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Harry Siavelis affiliated with any hospitals?

According to CMS data, Harry Siavelis is affiliated with Elmhurst Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Harry Siavelis was last updated on August 22, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.