CATHERINE MICHELLE TESKIN DO
NPI 1770089112
Internal Medicine - Rheumatology in Newark, DE
About Catherine Michelle Teskin Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CATHERINE MICHELLE TESKIN DO (NPI 1770089112) is an individual rheumatology provider in Newark, Delaware, licensed in Delaware (C2-0024337) and active in the NPI registry since April 2018. She is enrolled in Medicare PECOS, is affiliated with Union Hospital Of Cecil County, and maintains a secondary practice location in Wilmington.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Catherine Michelle Teskin 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 Catherine Teskin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Newark, DE 19718
- Reassigned Medicare billing, Delaware enrollment
- 1,531 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 9
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Union Hospital Of Cecil County
Acute Care Hospitals · Elkton, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19718 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Catherine Teskin's NPI number?
The NPI number for Catherine Teskin is 1770089112. It was assigned to this individual provider in the NPPES registry on April 4, 2018.
Where is Catherine Teskin located?
Catherine Teskin practices at Christiana Hospital 4755 Ogletown-Stanton Rd, Newark, DE 19718. The listed phone number is (302) 320-4411.
What is Catherine Teskin's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Catherine Teskin enrolled in Medicare?
Yes. Catherine Teskin 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 Catherine Teskin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Teskin reassigns Medicare benefits to Christiana Care Health Services, Inc (Newark, DE). 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 Catherine Teskin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Catherine Teskin accept?
Health plans from AmeriHealth Caritas Next and Highmark Blue Cross Blue Shield Delaware list Catherine Teskin 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 Catherine Teskin affiliated with any hospitals?
According to CMS data, Catherine Teskin is affiliated with Union Hospital Of Cecil County.
When was this NPI record last updated?
The NPPES record for Catherine Teskin was last updated on May 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Catherine Michelle Teskin, DO · NPI 1770089112
Rheumatology physician in Newark, Delaware. Individual provider, active in the CMS NPPES registry since April 4, 2018.
## Identity
- **NPI:** 1770089112 (Entity type: Individual)
- **Enumerated:** April 4, 2018
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** C2-0024337 (Delaware)
- **Sole proprietor:** No
## Practice location
- **Address:** CHRISTIANA HOSPITAL 4755 OGLETOWN-STANTON RD, Newark, DE 19718-0001
- **Phone:** (302) 320-4411
## 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:** Christiana Care Health Services, Inc (NPI 1104896596, Newark, DE), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Edward Via Col Of Osteo Medicine-Virginia Campus, class of 2018
## Record status
- **NPPES last updated:** May 19, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1770089112) · Data from the CMS NPPES public registry.