ZACHARY THOMAS SIRESS DO
NPI 1407598022
Internal Medicine in Saint Joseph, MO
About Zachary Thomas Siress Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ZACHARY THOMAS SIRESS DO (NPI 1407598022) is an individual internal medicine provider in Saint Joseph, Missouri, licensed in Missouri (2025053213) and active in the NPI registry since April 2022. He is enrolled in Medicare PECOS, is affiliated with Mosaic Life Care At St Joseph, and is a graduate of Other (2025).
NPPES Registry Identity
Specialties & Licenses
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
Zachary Thomas Siress Do 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 Zachary Siress reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saint Joseph, MO 64506
- Reassigned Medicare billing, Missouri enrollment
- 471 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mosaic Life Care At St Joseph
Acute Care Hospitals · Saint Joseph, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 64507 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 13
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Zachary Siress's NPI number?
The NPI number for Zachary Siress is 1407598022. It was assigned to this individual provider in the NPPES registry on April 13, 2022.
Where is Zachary Siress located?
Zachary Siress practices at 5514 Corporate Dr Ste 120, Saint Joseph, MO 64507. The listed phone number is (816) 271-1350.
What is Zachary Siress's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Zachary Siress enrolled in Medicare?
Yes. Zachary Siress 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 Zachary Siress's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Zachary Siress reassigns Medicare benefits to Heartland Regional Medical Center (Saint Joseph, 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 Zachary Siress's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Zachary Siress 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 Zachary Siress 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 Zachary Siress affiliated with any hospitals?
According to CMS data, Zachary Siress is affiliated with Mosaic Life Care At St Joseph.
When was this NPI record last updated?
The NPPES record for Zachary Siress was last updated on April 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Zachary Thomas Siress, DO · NPI 1407598022
Internal Medicine physician in Saint Joseph, Missouri. Individual provider, active in the CMS NPPES registry since April 13, 2022.
## Identity
- **NPI:** 1407598022 (Entity type: Individual)
- **Enumerated:** April 13, 2022
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 2025053213 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 5514 CORPORATE DR STE 120, Saint Joseph, MO 64507-7754
- **Phone:** (816) 271-1350 · **Fax:** (816) 271-1355
## 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:** Heartland Regional Medical Center (NPI 1477575405, Saint Joseph, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2025
## Record status
- **NPPES last updated:** April 7, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1407598022) · Data from the CMS NPPES public registry.