Catherine Teskin, DO
NPI 1770089112 · Rheumatology Physician · Newark, DE
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine Teskin, DO is a Rheumatology Physician provider in Newark, DE (NPI 1770089112).
Provider details
- NPI number
- 1770089112
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- C2-0024337 (DE)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
410 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 163 | $94 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 71 | $64 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 56 | $128 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 27 | $140 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 25 | $127 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 148 | 49 |
| Hydroxychloroquine Sulfate | 107 | 38 |
| Alendronate Sodium | 59 | 20 |
| Gabapentin | 57 | 23 |
| Celecoxib | 56 | 27 |
| Methotrexate Sodiumbrand: Methotrexate | 53 | 24 |
| Duloxetine Hcl | 44 | 17 |
Practice location
Mailing address
Additional practice locations (1)
- 501 W 14th StWilmington, DE 19801-1013Phone: (302) 320-4411
Registry dates
- Enumerated
- 2018-04-04
- Last updated
- 2026-05-19
- Certified
- 2026-05-19
Frequently asked questions
- What is Catherine Teskin's NPI number?
- Catherine Teskin's National Provider Identifier (NPI) is 1770089112, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Teskin's specialty?
- Catherine Teskin is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Catherine Teskin located?
- Catherine Teskin's practice location on file with NPPES is Christiana Hospital 4755 Ogletown-Stanton Rd, Newark, DE 19718-0001.
- What is Catherine Teskin's phone number?
- The practice phone number listed in the NPPES registry for Catherine Teskin is (302) 320-4411.
- Does Catherine Teskin accept Medicare?
- Catherine Teskin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine Teskin's NPI active?
- Yes — Catherine Teskin's NPI (1770089112) is active in the NPPES registry as of the last update on 2026-05-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.