Katherine Tkaczuk, M.D.
NPI 1225079601 · Medical Oncology Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Tkaczuk, M.D. is a Medical Oncology Physician provider in Baltimore, MD (NPI 1225079601).
Provider details
- NPI number
- 1225079601
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- D36146 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
464 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 134 | $99 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 129 | $147 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 120 | $17 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 39 | $120 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 20 | $176 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Letrozole | 174 | 55 |
| Anastrozole | 36 | 16 |
| Abemaciclibbrand: Verzenio | 31 | — |
| Elacestrant Hclbrand: Orserdu | 23 | — |
| Oxycodone Hcl | 22 | — |
| Exemestane | 16 | — |
| Apixabanbrand: Eliquis | 13 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$506 across 21 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-09
- Last updated
- 2011-03-08
Frequently asked questions
- What is Katherine Tkaczuk's NPI number?
- Katherine Tkaczuk's National Provider Identifier (NPI) is 1225079601, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Tkaczuk's specialty?
- Katherine Tkaczuk is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Tkaczuk located?
- Katherine Tkaczuk's practice location on file with NPPES is 22 S Greene St, Baltimore, MD 21201-1544.
- What is Katherine Tkaczuk's phone number?
- The practice phone number listed in the NPPES registry for Katherine Tkaczuk is (410) 328-2567.
- Does Katherine Tkaczuk accept Medicare?
- Katherine Tkaczuk is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Tkaczuk's NPI active?
- Yes — Katherine Tkaczuk's NPI (1225079601) is active in the NPPES registry as of the last update on 2011-03-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.