Katarzyna Twardowska, MD
NPI 1790881795 · Internal Medicine Physician · Anaheim, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katarzyna Twardowska, MD is a Internal Medicine Physician provider in Anaheim, CA (NPI 1790881795).
Provider details
- NPI number
- 1790881795
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A69481 (CA)
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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,189 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 1,224 | $119 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 350 | $79 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 219 | $116 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 201 | $174 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 86 | $111 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 57 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 85 | 22 |
| Pantoprazole Sodium | 82 | 40 |
| Atorvastatin Calcium | 76 | 28 |
| Levothyroxine Sodium | 65 | 18 |
| Potassium Chloride | 56 | 15 |
| Levetiracetam | 55 | — |
| Gabapentin | 52 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-16
- Last updated
- 2007-07-09
Frequently asked questions
- What is Katarzyna Twardowska's NPI number?
- Katarzyna Twardowska's National Provider Identifier (NPI) is 1790881795, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katarzyna Twardowska's specialty?
- Katarzyna Twardowska is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Katarzyna Twardowska located?
- Katarzyna Twardowska's practice location on file with NPPES is 1801 W Romneya Dr, Anaheim, CA 92801-1830.
- What is Katarzyna Twardowska's phone number?
- The practice phone number listed in the NPPES registry for Katarzyna Twardowska is (714) 780-5695.
- Does Katarzyna Twardowska accept Medicare?
- Katarzyna Twardowska is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katarzyna Twardowska's NPI active?
- Yes — Katarzyna Twardowska's NPI (1790881795) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.