DR. SONIA SINGH NAIN M.D.
NPI 1801893011
Pediatrics in Downers Grove, IL
About Dr. Sonia Singh Nain M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SONIA SINGH NAIN M.D. (NPI 1801893011) is an individual pediatrics provider in Downers Grove, Illinois, licensed in Virginia (0101236489) and active in the NPI registry since July 2005. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2001).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Locations 2
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Sonia Singh Nain M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Sonia Nain reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Downers Grove, IL 60515
- Reassigned Medicare billing, Illinois enrollment
- 4,870 clinicians in this Medicare group
Milwaukee, WI 53215
- Reassigned Medicare billing, Wisconsin enrollment
- 4,609 clinicians in this Medicare group
Morganton, NC 28655
- Reassigned Medicare billing, North Carolina enrollment
- 2,057 clinicians in this Medicare group
Rome, GA 30165
- Reassigned Medicare billing, Georgia enrollment
- 232 clinicians in this Medicare group
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 60515 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
DOWNERS GROVE, IL 60515
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 Sonia Nain's NPI number?
The NPI number for Sonia Nain is 1801893011. It was assigned to this individual provider in the NPPES registry on July 1, 2005. The provider is also known as Dr. Sonia Singh.
Where is Sonia Nain located?
Sonia Nain practices at 1441 Branding Ave Ste 310, Downers Grove, IL 60515. The listed phone number is (844) 284-0381.
What is Sonia Nain's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Sonia Nain enrolled in Medicare?
Yes. Sonia Nain is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Sonia Nain's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sonia Nain reassigns Medicare benefits to 4 organizations: Advocate Health And Hospitals Corporation (Downers Grove, IL), Aurora Medical Group, Inc. (Milwaukee, WI), Carolinas Physicians Network Inc (Morganton, NC) and Floyd Healthcare Management Inc (Rome, GA). 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 Sonia Nain's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sonia Nain accept?
Health plans from Anthem Blue Cross and Blue Shield, BlueCross BlueShield of South Carolina, CareSource (Common Ground Healthcare), InStil Health and Network Health and 4 other insurers list Sonia Nain 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 Sonia Nain was last updated on August 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 58 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.
# Dr. Sonia Singh Nain, M.D. · NPI 1801893011
Pediatrics physician in Downers Grove, Illinois. Individual provider, active in the CMS NPPES registry since July 1, 2005.
## Identity
- **NPI:** 1801893011 (Entity type: Individual)
- **Enumerated:** July 1, 2005
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 0101236489 (Virginia)
- **Sole proprietor:** No
## Practice location
- **Address:** 1441 BRANDING AVE STE 310, Downers Grove, IL 60515-5624
- **Phone:** (844) 284-0381 · **Fax:** (414) 389-2184
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Advocate Health And Hospitals Corporation (NPI 1578670543, Downers Grove, IL); Aurora Medical Group, Inc. (NPI 1427271378, Milwaukee, WI); Carolinas Physicians Network Inc (NPI 1962784363, Morganton, NC); Floyd Healthcare Management Inc (NPI 1023057775, Rome, GA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2001
## Record status
- **NPPES last updated:** August 25, 2026
- **Other identifiers:** Medicaid 100405815 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1801893011) · Data from the CMS NPPES public registry.