JOHN OH MD SC
NPI 1407035199
Internal Medicine in Niles, IL
About John Oh Md Sc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN OH MD SC (NPI 1407035199) is a healthcare organization registered as an internal medicine in Niles, Illinois and active in the NPI registry since October 2007. The organization lists John Oh, Physician, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
John Oh Md Sc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to John Oh MD Sc, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 John Oh MD Sc's NPI number?
The NPI number for John Oh MD Sc is 1407035199. It was assigned to this organization in the NPPES registry on October 30, 2007.
Where is John Oh MD Sc located?
John Oh MD Sc is located at 241 Golf Mill Ctr Suite 416, Niles, IL 60714. The listed phone number is (847) 375-8282.
What is John Oh MD Sc's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is John Oh MD Sc enrolled in Medicare?
Yes. John Oh MD Sc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through John Oh MD Sc?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to John Oh MD Sc. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does John Oh MD Sc accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list John Oh MD Sc 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 John Oh MD Sc was last updated on February 28, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# John Oh Md Sc · NPI 1407035199
Internal Medicine organization in Niles, Illinois. Organization record, active in the CMS NPPES registry since October 30, 2007.
## Identity
- **NPI:** 1407035199 (Entity type: Organization)
- **Enumerated:** October 30, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** John Oh, PHYSICIAN
## Practice location
- **Address:** 241 GOLF MILL CTR, SUITE 416, Niles, IL 60714-1224
- **Phone:** (847) 375-8282
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Internal Medicine) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 28, 2012
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Source: [NPI Profile](https://npiprofile.com/npi/1407035199) · Data from the CMS NPPES public registry.