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TAMASYN NELSON AKSOY D.O.
NPI 1295981280
Pediatrics in Chicago, IL

Active since August 11, 2008PECOS Enrolled
1645 W JACKSON BLVD STE 200, CHICAGO, IL 60612(312) 942-3034 Get Directions Write a Review

NPPES record last updated: May 17, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 17, 2021, Nov 13, 2019, Mar 4, 2016 (3 updates tracked since 2016).

About Tamasyn Nelson Aksoy D.o. NPPES

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

TAMASYN NELSON AKSOY D.O. (NPI 1295981280) is an individual pediatrics provider in Chicago, Illinois, licensed in Illinois (036-154479) and active in the NPI registry since August 2008. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1295981280
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameTAMASYN NELSON AKSOYCredential: D.O.
Location Address1645 W JACKSON BLVD STE 200Chicago, IL 60612-3227
Mailing Address1645 W Jackson Blvd Ste 200Chicago, IL 60612-3227 · (312) 942-3034
Phone(312) 942-3034
Sole ProprietorNo
Enumeration DateAugust 11, 2008
Last NPPES UpdateMay 17, 20213 updates tracked since enumeration
NPPES CertifiedMay 17, 2021
✔ NPI 1295981280 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in IL · 036-154479
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
1645 W JACKSON BLVD STE 200, Chicago, IL 60612
Open in Google Maps ↗

Secondary Practice Locations 2

Location 12200 Childrens WayNashville, TN 37232-0005 · Phone (615) 936-2000
Location 23601 The Vanderbilt ClinicNashville, TN 37232-0001 · Phone (615) 322-3000

Other Identifiers 1

Medicaid03484535NY

Accepted Insurance

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Tamasyn Nelson Aksoy D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Tamasyn Nelson Aksoy reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Rush University Medical Center
0.2 mi
Diagnostic Radiology
1620 W HARRISON ST
Chicago, IL 60612
  • Reassigned Medicare billing, Illinois enrollment
  • Medicare enrollment name: Rush University Medical Group
  • 2,169 clinicians in this Medicare group
NPI 1184269425 (312) 563-4270

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

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
$94.06 typical visit price
range $60.08 – $183.39
Typical copayment $23.51 (range $15.02 – $45.84)
Most-billed visit code 99203
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.

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.

AMANDA SLUTSKY
Student in an Organized Health Care Education/Training Program
1645 W JACKSON BLVD STE 200
CHICAGO, IL 60612
Cook County (312) 942-2200
NALA AL-KHATIB MD
Pediatrics
1645 W JACKSON BLVD STE 200
CHICAGO, IL 60612
Cook County (312) 942-2200
DR. JAMIE MARA MD
Pediatrics
1645 W JACKSON BLVD STE 200
CHICAGO, IL 60612
Cook County (312) 942-2200
VIRGINIA KATHERINE KRECKMAN MD
Pediatrics
1645 W JACKSON BLVD STE 200
CHICAGO, IL 60612
Cook County (312) 942-2200
DR. MONICA ROSE FEHRENBACH MD
Pediatrics
1645 W JACKSON BLVD STE 200
CHICAGO, IL 60612
Cook County (312) 942-2200
DR. ANYA N BHAGWAKAR DO
Pediatrics
1645 W JACKSON BLVD STE 200
CHICAGO, IL 60612
Cook County (312) 942-2200
DR. SHRUTI PATTEKAR DO
Pediatrics
1645 W JACKSON BLVD STE 200
CHICAGO, IL 60612
Cook County (312) 942-2200
ALISA CORRADO MD
Pediatrics
1645 W JACKSON BLVD STE 200
CHICAGO, IL 60612
Cook County (312) 942-2200

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 Tamasyn Nelson Aksoy's NPI number?

The NPI number for Tamasyn Nelson Aksoy is 1295981280. It was assigned to this individual provider in the NPPES registry on August 11, 2008.

Where is Tamasyn Nelson Aksoy located?

Tamasyn Nelson Aksoy practices at 1645 W Jackson Blvd Ste 200, Chicago, IL 60612. The listed phone number is (312) 942-3034.

What is Tamasyn Nelson Aksoy's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Tamasyn Nelson Aksoy enrolled in Medicare?

Yes. Tamasyn Nelson Aksoy is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Tamasyn Nelson Aksoy's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Tamasyn Nelson Aksoy reassigns Medicare benefits to Rush University Medical Center (Chicago, 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 Tamasyn Nelson Aksoy's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Tamasyn Nelson Aksoy accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Tamasyn Nelson Aksoy 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.

When was this NPI record last updated?

The NPPES record for Tamasyn Nelson Aksoy was last updated on May 17, 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.