GUANGCHEN ZOU M.D.
NPI 1093378994
Internal Medicine - Nephrology in Saint Charles, MO
About Guangchen Zou M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GUANGCHEN ZOU M.D. (NPI 1093378994) is an individual nephrology provider in Saint Charles, Missouri, licensed in Missouri (2023033248) and active in the NPI registry since April 2019. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses
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 and accepts Medicare assignment
Guangchen Zou M.d. 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.
Medicare Billing Reassignment
Medicare enrollment records show Guangchen Zou reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Washington, MO 63090
- Reassigned Medicare billing, Missouri enrollment
- 13 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.
Areas of Expertise CMS Part B claims 6
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.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Hospital St Louis
Acute Care Hospitals · Saint Louis, MOMercy Hospital South
Acute Care Hospitals · Saint Louis, MOMercy Hospital Lincoln
Critical Access Hospitals · Troy, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63303 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAINT CHARLES, MO 63303
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 Guangchen Zou's NPI number?
The NPI number for Guangchen Zou is 1093378994. It was assigned to this individual provider in the NPPES registry on April 16, 2019.
Where is Guangchen Zou located?
Guangchen Zou practices at 1820 Zumbehl Rd Ste 120, Saint Charles, MO 63303. The listed phone number is (314) 801-5350.
What is Guangchen Zou's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Guangchen Zou enrolled in Medicare?
Yes. Guangchen Zou 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 Guangchen Zou's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Guangchen Zou reassigns Medicare benefits to Mercy Clinic Nephrology LLC (Washington, MO). 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 Guangchen Zou's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Guangchen Zou accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 3 other insurers list Guangchen Zou 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 Guangchen Zou affiliated with any hospitals?
According to CMS data, Guangchen Zou is affiliated with Mercy Hospital St Louis, Mercy Hospital South and Mercy Hospital Lincoln.
When was this NPI record last updated?
The NPPES record for Guangchen Zou was last updated on August 14, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Guangchen Zou, M.D. · NPI 1093378994
Nephrology physician in Saint Charles, Missouri. Individual provider, active in the CMS NPPES registry since April 16, 2019.
## Identity
- **NPI:** 1093378994 (Entity type: Individual)
- **Enumerated:** April 16, 2019
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** 2023033248 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1820 ZUMBEHL RD STE 120, Saint Charles, MO 63303-2761
- **Phone:** (314) 801-5350 · **Fax:** (314) 801-5323
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Mercy Clinic Nephrology LLC (NPI 1194135632, Washington, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** August 14, 2024
- **Other identifiers:** Medicaid 377602600 (MD)
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Source: [NPI Profile](https://npiprofile.com/npi/1093378994) · Data from the CMS NPPES public registry.