DR. KAREN KARTUN M.D.
NPI 1720163363
Internal Medicine - Endocrinology, Diabetes & Metabolism in Fontana, CA
About Dr. Karen Kartun M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KAREN KARTUN M.D. (NPI 1720163363) is an individual endocrinology, diabetes & metabolism provider in Fontana, California, licensed in California (G71674) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Karen Kartun M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Karen Kartun reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Fontana, CA 92335
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1952333460 (California)
- 5,228 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 92335 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.
FONTANA, CA 92335
FONTANA, CA 92335
FONTANA, CA 92335
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 Karen Kartun's NPI number?
The NPI number for Karen Kartun is 1720163363. It was assigned to this individual provider in the NPPES registry on October 25, 2006.
Where is Karen Kartun located?
Karen Kartun practices at 9985 Sierra Ave Mob 3 Module 3, Fontana, CA 92335. The listed phone number is (888) 750-0036.
What is Karen Kartun's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Karen Kartun enrolled in Medicare?
Yes. Karen Kartun is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Karen Kartun's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Kartun reassigns Medicare benefits to Southern California Permanente Medical Group (Fontana, 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 Karen Kartun'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 Karen Kartun was last updated on November 18, 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.
# Dr. Karen Kartun, M.D. · NPI 1720163363
Endocrinology, Diabetes & Metabolism physician in Fontana, California. Individual provider, active in the CMS NPPES registry since October 25, 2006.
## Identity
- **NPI:** 1720163363 (Entity type: Individual)
- **Enumerated:** October 25, 2006
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** G71674 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 9985 SIERRA AVE, MOB 3 MODULE 3, Fontana, CA 92335-6720
- **Phone:** (888) 750-0036
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Southern California Permanente Medical Group (NPI 1689606196, Fontana, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 18, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1720163363) · Data from the CMS NPPES public registry.