DR. JOHN K. MWANGI M.D.
NPI 1699903831
Hospitalist in Saint Louis, MO
About Dr. John K. Mwangi M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN K. MWANGI M.D. (NPI 1699903831) is an individual hospitalist provider in Saint Louis, Missouri, licensed in Missouri (2012020694) and active in the NPI registry since June 2009. He is enrolled in Medicare PECOS, is affiliated with Ssm St Clare Health Center, and is a graduate of Other (2003).
NPPES Registry Identity
Specialties & Licenses 2
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
Dr. John K. Mwangi 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 Reassignments
2Medicare enrollment records show John Mwangi reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63104
- Reassigned Medicare billing, Missouri enrollment
- 1,294 clinicians in this Medicare group
Fenton, MO 63026
- Reassigned Medicare billing, Missouri enrollment
- 255 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 11
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.
Ssm St Clare Health Center
Acute Care Hospitals · Fenton, MOSsm Health St Mary's Hospital - St Louis
Acute Care Hospitals · Richmond Heights, MOSsm Health Saint Louis University Hospital
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63136 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
SAINT LOUIS, MO 63136
SAINT LOUIS, MO 63136
SAINT LOUIS, MO 63136
SAINT LOUIS, MO 63136
SAINT LOUIS, MO 63136
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 Mwangi's NPI number?
The NPI number for John Mwangi is 1699903831. It was assigned to this individual provider in the NPPES registry on June 25, 2009.
Where is John Mwangi located?
John Mwangi practices at 11133 Dunn Rd Ste 2427, Saint Louis, MO 63136. The listed phone number is (314) 653-5643.
What is John Mwangi's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is John Mwangi enrolled in Medicare?
Yes. John Mwangi 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 organizations bill Medicare for John Mwangi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Mwangi reassigns Medicare benefits to 2 organizations: Ssm Health Care Group (Saint Louis, MO) and Cogent Healthcare Of Missouri, Inc (Fenton, MO). 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 John Mwangi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Mwangi accept?
Health plans from Anthem Blue Cross and Blue Shield and Oscar Insurance Company list John Mwangi 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 John Mwangi affiliated with any hospitals?
According to CMS data, John Mwangi is affiliated with Ssm St Clare Health Center, Ssm Health St Mary's Hospital - St Louis and Ssm Health Saint Louis University Hospital.
When was this NPI record last updated?
The NPPES record for John Mwangi was last updated on July 10, 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.
# Dr. John K. Mwangi, M.D. · NPI 1699903831
Hospitalist physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since June 25, 2009.
## Identity
- **NPI:** 1699903831 (Entity type: Individual)
- **Enumerated:** June 25, 2009
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 2012020694 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 11133 DUNN RD, STE 2427, Saint Louis, MO 63136-6119
- **Phone:** (314) 653-5643 · **Fax:** (314) 653-5648
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Ssm Health Care Group (NPI 1306589544, Saint Louis, MO); Cogent Healthcare Of Missouri, Inc (NPI 1780961599, Fenton, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2003
## Record status
- **NPPES last updated:** July 10, 2012
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Source: [NPI Profile](https://npiprofile.com/npi/1699903831) · Data from the CMS NPPES public registry.