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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. DEREJE T SIYUM MD
NPI 1164981007
Internal Medicine in Brookfield, WI

Active since March 19, 2019PECOS EnrolledAccepts Medicare Assignment
18200 W CAPITOL DR STE 200, BROOKFIELD, WI 53045(262) 261-8880 Get Directions Write a Review

NPPES record last updated: October 6, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 6, 2026, Oct 1, 2026, May 17, 2026 and 6 more (9 updates tracked since 2019).

About Dr. Dereje T Siyum Md NPPES

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

DR. DEREJE T SIYUM MD (NPI 1164981007) is an individual internal medicine provider in Brookfield, Wisconsin, licensed in Wisconsin (74852-20) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Aurora Memorial Hospital Burlington, and maintains a secondary practice location in Milwaukee.

NPPES Registry Identity

NPI1164981007
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. DEREJE T SIYUMCredential: MD
Location Address18200 W CAPITOL DR STE 200Brookfield, WI 53045-1446
Mailing AddressPo Box 735044Chicago, IL 60673-5044 · (800) 326-2250
Phone(262) 261-8880
Sole ProprietorNo
Medical School CMSOtherGraduated 2014
Enumeration DateMarch 19, 2019
Last NPPES UpdateOctober 6, 20269 updates tracked since enumeration
NPPES CertifiedOctober 6, 2026
✔ NPI 1164981007 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in WI · 74852-20
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.
Also ListedInternal Medicine · Obesity MedicineTaxonomy 207RB0002X · License 74852-20 (WI)
Also ListedHospitalistTaxonomy 208M00000X · License 74852-20 (WI)
18200 W CAPITOL DR STE 200, Brookfield, WI 53045
Open in Google Maps ↗

Secondary Practice Location 1

Location 1945 N 12th StMilwaukee, WI 53233-1305 · Phone (414) 219-7427 · Fax (414) 219-6078

Other Identifiers 1

Medicaid100202312WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource (Common Ground Healthcare).Insurance ›

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

Dr. Dereje T Siyum Md 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 ID6305227802
PECOS Enrollment IDI20220714002927
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 Dereje Siyum reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Aurora Medical Group, Inc.
8.5 mi
Obstetrics & Gynecology
8905 W LINCOLN AVE, SUITE 515
West Allis, WI 53227
  • Reassigned Medicare billing, Wisconsin enrollment
  • 4,609 clinicians in this Medicare group
NPI 1457592735 (414) 328-8650

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 4

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
204 services90 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
86 services26 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
69 services68 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.
35 services34 patients

Hospital Affiliations CMS Care Compare 5

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

Aurora Memorial Hospital Burlington

Acute Care Hospitals · Burlington, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520059
Location252 Mchenry StBurlington, WI 53105 · Racine County
Emergency services

Aurora Lakeland Medical Center

Acute Care Hospitals · Elkhorn, WI
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520102
LocationW3985 County Road NnElkhorn, WI 53121 · Walworth County
Emergency services Birthing friendly

Bay Area Medical Center

Acute Care Hospitals · Marinette, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520113
Location3003 University DrMarinette, WI 54143 · Marinette County
Emergency services Birthing friendly

Aurora St Lukes Medical Center

Acute Care Hospitals · Milwaukee, WI
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520138
Location2900 W Oklahoma AveMilwaukee, WI 53215 · Milwaukee County
Emergency services Birthing friendly

Aurora Medical Center - Summit

Acute Care Hospitals · Summit, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520206
Location36500 Aurora DriveSummit, WI 53066 · Waukesha County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53045 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
$123.69 typical visit price
range $53.90 – $163.24
Typical copayment $30.92 (range $13.47 – $40.81)
Most-billed visit code 99204
Established Patient
$95.41 typical visit price
range $17.40 – $133.76
Typical copayment $23.85 (range $4.35 – $33.44)
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 9

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

SAAK HEALTH, LLC
Internal Medicine (Interventional Cardiology)
18200 W CAPITOL DR STE 200
BROOKFIELD, WI 53045
Waukesha County (262) 444-5148
RAMAGOPAL J TUMULURI MD
Internal Medicine (Interventional Cardiology)
18200 W CAPITOL DR STE 200
BROOKFIELD, WI 53045
Waukesha County (262) 444-5148
BROOKFIELD CARDIOVASCULAR ASSOCIATES, SC
Internal Medicine (Interventional Cardiology)
18200 W CAPITOL DR STE 200
BROOKFIELD, WI 53045
Waukesha County (414) 698-6510
SAAK, SC
Internal Medicine (Interventional Cardiology)
18200 W CAPITOL DR STE 200
BROOKFIELD, WI 53045
Waukesha County (262) 444-5148
WELLIFYCARE MEDICAL S.C.
Internal Medicine
18200 W CAPITOL DR STE 200
BROOKFIELD, WI 53045
Waukesha County (262) 261-8880
SAAK WOUND CARE CLINICS LLC
Preventive Medicine (Undersea and Hyperbaric Medicine)
18200 W CAPITOL DR STE 200
BROOKFIELD, WI 53045
Waukesha County (262) 444-5148
DR. SUMANA KODURI MD
Urology (Urogynecology and Reconstructive Pelvic Surgery)
18200 W CAPITOL DR STE 200
BROOKFIELD, WI 53045
Waukesha County (262) 444-5148
KRISTIN ANN CUFF NP
Nurse Practitioner (Psychiatric/Mental Health)
18200 W CAPITOL DR STE 200
BROOKFIELD, WI 53045
Waukesha County (262) 444-5148

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 Dereje Siyum's NPI number?

The NPI number for Dereje Siyum is 1164981007. It was assigned to this individual provider in the NPPES registry on March 19, 2019.

Where is Dereje Siyum located?

Dereje Siyum practices at 18200 W Capitol Dr Ste 200, Brookfield, WI 53045. The listed phone number is (262) 261-8880.

What is Dereje Siyum's specialty?

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

Is Dereje Siyum enrolled in Medicare?

Yes. Dereje Siyum 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 Dereje Siyum's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Dereje Siyum reassigns Medicare benefits to Aurora Medical Group, Inc. (West Allis, WI). 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 Dereje Siyum's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Dereje Siyum accept?

Health plans from CareSource (Common Ground Healthcare) list Dereje Siyum 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 Dereje Siyum affiliated with any hospitals?

According to CMS data, Dereje Siyum is affiliated with Aurora Memorial Hospital Burlington, Aurora Lakeland Medical Center, Bay Area Medical Center, Aurora St Lukes Medical Center and Aurora Medical Center - Summit.

When was this NPI record last updated?

The NPPES record for Dereje Siyum was last updated on October 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 days 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.