Mark Markowski, M.D., PH.D.
NPI 1689809188 · Hematology & Oncology Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Markowski, M.D., PH.D. is a Hematology & Oncology Physician provider in Baltimore, MD (NPI 1689809188).
Provider details
- NPI number
- 1689809188
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D74195 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 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
543 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 275 | $152 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 190 | $193 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 55 | $191 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 12 | $139 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 11 | $94 |
Typical Medicare-allowed amounts for these services range $94–$193 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 107 | 25 |
| Abiraterone Acetate | 82 | 15 |
| Darolutamidebrand: Nubeqa | 40 | — |
| Tamsulosin Hcl | 26 | — |
| Bicalutamide | 21 | — |
| Enzalutamidebrand: Xtandi | 17 | — |
| Rivaroxabanbrand: Xarelto | 16 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$174 across 1 record (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
- 2009-05-27
- Last updated
- 2017-10-19
Frequently asked questions
- What is Mark Markowski's NPI number?
- Mark Markowski's National Provider Identifier (NPI) is 1689809188, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Markowski's specialty?
- Mark Markowski is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Markowski located?
- Mark Markowski's practice location on file with NPPES is 600 N Wolfe St, Baltimore, MD 21287-0005.
- What is Mark Markowski's phone number?
- The practice phone number listed in the NPPES registry for Mark Markowski is (410) 955-3707.
- Does Mark Markowski accept Medicare?
- Mark Markowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Markowski's NPI active?
- Yes — Mark Markowski's NPI (1689809188) is active in the NPPES registry as of the last update on 2017-10-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.