JEFFREY KARSON MD
NPI 1205404597
Internal Medicine in Grand Rapids, MI
About Jeffrey Karson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JEFFREY KARSON MD (NPI 1205404597) is an individual internal medicine provider in Grand Rapids, Michigan, licensed in Michigan (4351048542) and active in the NPI registry since June 2021. He is enrolled in Medicare PECOS, is affiliated with Spectrum Health, and is a graduate of Other (2020).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Jeffrey Karson 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Spectrum Health
Acute Care Hospitals · Grand Rapids, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 49503 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GRAND RAPIDS, MI 49503
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 Jeffrey Karson's NPI number?
The NPI number for Jeffrey Karson is 1205404597. It was assigned to this individual provider in the NPPES registry on June 14, 2021.
Where is Jeffrey Karson located?
Jeffrey Karson practices at 100 Michigan St NE, Grand Rapids, MI 49503. The listed phone number is (616) 391-3139.
What is Jeffrey Karson's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Jeffrey Karson enrolled in Medicare?
Yes. Jeffrey Karson 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.
Is Jeffrey Karson affiliated with any hospitals?
According to CMS data, Jeffrey Karson is affiliated with Spectrum Health.
When was this NPI record last updated?
The NPPES record for Jeffrey Karson was last updated on July 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Jeffrey Karson, MD · NPI 1205404597
Internal Medicine physician in Grand Rapids, Michigan. Individual provider, active in the CMS NPPES registry since June 14, 2021.
## Identity
- **NPI:** 1205404597 (Entity type: Individual)
- **Enumerated:** June 14, 2021
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 4351048542 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 MICHIGAN ST NE, Grand Rapids, MI 49503-2560
- **Phone:** (616) 391-3139
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** July 29, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1205404597) · Data from the CMS NPPES public registry.