Karleung Siu, M.D.
NPI 1649417437 · Hematology (Internal Medicine) Physician · Teaneck, NJ
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karleung Siu, M.D. is a Hematology (Internal Medicine) Physician provider in Teaneck, NJ (NPI 1649417437).
Provider details
- NPI number
- 1649417437
- Entity type
- Individual
- Primary specialty
- Hematology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 247704 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 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
4,418 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 600 | $194 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 510 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 486 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 276 | $10 |
| Lactate Dehydrogenase (enzyme) Level83615 | 261 | $6 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 259 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 151 | 47 |
| Apixabanbrand: Eliquis | 98 | 21 |
| Ruxolitinib Phosphatebrand: Jakafi | 52 | — |
| Prednisone | 48 | 22 |
| Gabapentin | 45 | 14 |
| Oxycodone Hcl | 43 | 16 |
| Rivaroxabanbrand: Xarelto |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-01-15
- Last updated
- 2024-12-06
- Certified
- 2024-12-06
Frequently asked questions
- What is Karleung Siu's NPI number?
- Karleung Siu's National Provider Identifier (NPI) is 1649417437, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karleung Siu's specialty?
- Karleung Siu is listed in the NPPES registry with a primary specialty of Hematology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Karleung Siu located?
- Karleung Siu's practice location on file with NPPES is 718 Teaneck Rd, Teaneck, NJ 07666-4245.
- What is Karleung Siu's phone number?
- The practice phone number listed in the NPPES registry for Karleung Siu is (201) 227-6008.
- Does Karleung Siu accept Medicare?
- Karleung Siu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karleung Siu's NPI active?
- Yes — Karleung Siu's NPI (1649417437) is active in the NPPES registry as of the last update on 2024-12-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.