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NATASHA AHN MD
NPI 1598156259
Pediatrics - Neonatal-Perinatal Medicine in Chicago, IL

Active since February 16, 2015PECOS Enrolled
5841 S MARYLAND AVE # MC6060, CHICAGO, IL 60637(773) 702-6210 Get Directions Write a Review

NPPES record last updated: June 22, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 22, 2025, Jun 6, 2025, May 6, 2022 and 1 more (4 updates tracked since 2019).

About Natasha Ahn Md NPPES

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

NATASHA AHN MD (NPI 1598156259) is an individual neonatal-perinatal medicine provider in Chicago, Illinois, licensed in Illinois (036.159660) and active in the NPI registry since February 2015. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1598156259
Entity TypeIndividualFemale
Primary Taxonomy2080N0001X
Provider Legal NameNATASHA AHNCredential: MD
Location Address5841 S MARYLAND AVE # MC6060Chicago, IL 60637-1443
Mailing Address150 Harvester Dr Ste 300Burr Ridge, IL 60527-5965 · (773) 702-1150
Phone(773) 702-6210
Sole ProprietorNo
Enumeration DateFebruary 16, 2015
Last NPPES UpdateJune 22, 20254 updates tracked since enumeration
NPPES CertifiedJune 22, 2025
✔ NPI 1598156259 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Neonatal-Perinatal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080N0001X
License✔ Licensed in IL · 036.159660
Definition
A pediatrician who is the principal care provider for sick newborn infants. Clinical expertise is used for direct patient care and for consulting with obstetrical colleagues to plan for the care of mothers who have high-risk pregnancies.
Also ListedPediatricsTaxonomy 208000000X · License 036159660 (IL)
5841 S MARYLAND AVE # MC6060, Chicago, IL 60637
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Natasha Ahn Md 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 Reassignments

3

Medicare enrollment records show Natasha Ahn reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The University Of Chicago Medical Center
Same address
General Acute Care Hospital
5841 S MARYLAND AVE
Chicago, IL 60637
  • Reassigned Medicare billing, Illinois enrollment
  • 1,905 clinicians in this Medicare group
NPI 1033218128 (773) 702-1530
University Of Chicago
Same address
Multi-Specialty
5841 S MARYLAND AVE, UCPG/MC 1099
Chicago, IL 60637
  • Reassigned Medicare billing, Illinois enrollment
  • 2,237 clinicians in this Medicare group
NPI 1821048786 (773) 702-9200
Osf Multi-Specialty Group
128 mi
Internal Medicine
8600 N STATE ROUTE 91
Peoria, IL 61615
  • Reassigned Medicare billing, Illinois enrollment
  • 2,944 clinicians in this Medicare group
NPI 1154908929 (309) 683-5050

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

Other Providers at the Same Location NPPES 10

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

ELIZABETH EMILY YARO MD
Pediatrics (Neonatal-Perinatal Medicine)
5841 S MARYLAND AVE # MC6060
CHICAGO, IL 60637
Cook County (773) 702-6210
DR. MINGSHAN LAI MD
Pediatrics (Neonatal-Perinatal Medicine)
5841 S MARYLAND AVE # MC6060
CHICAGO, IL 60637
Cook County (773) 702-6210
DEBORAH MOJOLAJESU ADEGBOSIN M.D.
Pediatrics (Neonatal-Perinatal Medicine)
5841 S MARYLAND AVE # MC6060
CHICAGO, IL 60637
Cook County (773) 702-6210
JUPIN CHACKO
Pediatrics
5841 S MARYLAND AVE # MC6060
CHICAGO, IL 60637
Cook County (773) 702-6210
SAAJIDHA RIZVYDEEN DO
Pediatrics (Neonatal-Perinatal Medicine)
5841 S MARYLAND AVE # MC6060
CHICAGO, IL 60637
Cook County (773) 702-6210
DR. ANNIE ZHILI WANG M.D.
Pediatrics (Neonatal-Perinatal Medicine)
5841 S MARYLAND AVE # MC6060
CHICAGO, IL 60637
Cook County (773) 702-6210
DR. KELLY NELSON KELLY M.D.
Pediatrics (Neonatal-Perinatal Medicine)
5841 S MARYLAND AVE # MC6060
CHICAGO, IL 60637
Cook County (773) 834-3352
CATHERINE GRODEN MD
Pediatrics (Neonatal-Perinatal Medicine)
5841 S MARYLAND AVE # MC6060
CHICAGO, IL 60637
Cook County (847) 420-6605

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 Natasha Ahn's NPI number?

The NPI number for Natasha Ahn is 1598156259. It was assigned to this individual provider in the NPPES registry on February 16, 2015.

Where is Natasha Ahn located?

Natasha Ahn practices at 5841 S Maryland Ave # Mc6060, Chicago, IL 60637. The listed phone number is (773) 702-6210.

What is Natasha Ahn's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.

Is Natasha Ahn enrolled in Medicare?

Yes. Natasha Ahn is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Natasha Ahn's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Natasha Ahn reassigns Medicare benefits to 3 organizations: The University Of Chicago Medical Center (Chicago, IL), University Of Chicago (Chicago, IL) and Osf Multi-Specialty Group (Peoria, IL). Each 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 Natasha Ahn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Natasha Ahn was last updated on June 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.