GENEVA ALINCASTRE SAGUN MD
NPI 1588928642
Internal Medicine in Kalamazoo, MI
About Geneva Alincastre Sagun Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GENEVA ALINCASTRE SAGUN MD (NPI 1588928642) is an individual internal medicine provider in Kalamazoo, Michigan, licensed in Michigan (4301101658) and active in the NPI registry since July 2012. She is enrolled in Medicare PECOS and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses 3
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
Geneva Alincastre Sagun Md 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 Geneva Sagun reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Stockton, CA 95210
- Reassigned Medicare billing, California enrollment
- 20,078 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 49006 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 12
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 Geneva Sagun's NPI number?
The NPI number for Geneva Sagun is 1588928642. It was assigned to this individual provider in the NPPES registry on July 3, 2012.
Where is Geneva Sagun located?
Geneva Sagun practices at 4613 W Main St Suite A, Kalamazoo, MI 49006. The listed phone number is (269) 488-8672.
What is Geneva Sagun's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Geneva Sagun enrolled in Medicare?
Yes. Geneva Sagun 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 Geneva Sagun's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Geneva Sagun reassigns Medicare benefits to Permanente Medical Group Inc (Stockton, CA). 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 Geneva Sagun's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Geneva Sagun was last updated on December 20, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Geneva Alincastre Sagun, MD · NPI 1588928642
Internal Medicine physician in Kalamazoo, Michigan. Individual provider, active in the CMS NPPES registry since July 3, 2012.
## Identity
- **NPI:** 1588928642 (Entity type: Individual)
- **Enumerated:** July 3, 2012
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 4301101658 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 4613 W MAIN ST, SUITE A, Kalamazoo, MI 49006-2645
- **Phone:** (269) 488-8672 · **Fax:** (269) 488-8673
## 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:** Permanente Medical Group Inc (NPI 1548343510, Stockton, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** December 20, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1588928642) · Data from the CMS NPPES public registry.