NPPES file of Aug 9, 2026

Karleung Siu, M.D.

Hematology (Internal Medicine) Physician · Teaneck, NJ

Karleung Siu, M.D. is a hematology (internal medicine) physician with a practice address in Teaneck, New Jersey, and NPI 1649417437, issued on Jan 15, 2009. Check the license (New Jersey 25MA09153700, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1649417437
Name
Karleung Siu
Credential
M.D.
Primary taxonomy
Hematology (Internal Medicine) Physician 207RH0000X
License numbers
25MA09153700 NJ
247704 NJ
25MA091537001 NJ
247704 NY
Self-reported in NPPES; status is on the state search
Practice location
718 Teaneck RD, Teaneck, NJ 07666
Phone
(201) 227-6008
Enumerated
Jan 15, 2009
Record last updated
Dec 6, 2024
Fax
(201) 227-6008
Medicare enrollment
Enrolled (PECOS I20121010000021); accepts Medicare assignment
Medical or professional school
State University Of New York Downstate Medical Center, 2005
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest hematology (internal medicine) physician records → All 37 in New Jersey → Look up another NPI →

Also registered at 718 Teaneck RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Abel Abebe, MD, MPHStudent in an Organized Health Care Education/Training Program1437098365
  2. Ananea Adamidis, M.D.Nephrology Physician1235139957
  3. Barbara AmayaEmergency Registered Nurse1336973841
  4. Rose Apkarian, RDRegistered Dietitian1619513454
  5. Aurora Aranzazu, FNP-CFamily Nurse Practitioner1992271456
  6. Tracey Arnauer, LCSWClinical Social Worker1053183699

Verify Karleung Siu in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
    Search for license 25MA09153700    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the New Jersey license search

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2.9 times the Medicare Part D claims of the average hematology (internal medicine) physician in 2024

1,463 Medicare Part D claims for 225 beneficiaries, against an average of 496 among the 1,036 providers of this specialty who prescribed in Part D. 115 claims were for opioids.

  1. Karleung Siu1,463
  2. Specialty average496

Most prescribed

  1. Anastrozole151 claims
  2. Eliquis98 claims
  3. Jakafi52 claims
  4. Prednisone48 claims
  5. Gabapentin45 claims
  6. Oxycodone Hcl43 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Bills Medicare through one group practice

  1. Barnabas Health Medical Group PCLivingston, NJ

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Karleung Siu among 37 hematology (internal medicine) physician records in New Jersey

Karleung Siu, M.D. is one of 37 hematology (internal medicine) physician records with a practice address in New Jersey. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 51% of them.

  • NPI issued2009 · 51% of these records are older, 43% newer
  • In a Medicare fileYes · 78% of these records are
  • In the CMS Doctors and Clinicians fileYes · 68% of these records are
  • Graduated2005 · median 2008 among the 25 with a school on file
  • Record last updated2024 · 19% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hematology (Internal Medicine) Physician providers in New Jersey

There are 37 hematology (internal medicine) physician records in New Jersey.

All 37 in New Jersey → Every provider in Teaneck → Hematology (Internal Medicine) Physician nationwide →

The 8 hematology (internal medicine) physician records with the nearest ZIP codes

  1. Eugene Smith, M.D.Westwood, NJ 076751326286758
  2. Robert Tassan, M.D.Westwood, NJ 076751578596508
  3. Anupama Doraiswamy, MDMontvale, NJ 076451649499336
  4. Katherine Linder, MDHackensack, NJ 076011417358367
  5. Pooja Phull, MDHackensack, NJ 076011104245315
  6. Hussam EltoukhyWest Long Branch, NJ 077641356737324
  7. Patrick Lee, MDWest Long Branch, NJ 077641356442602
  8. Casey FordPaterson, NJ 075031215881339

Common questions

What is Karleung Siu, M.D.'s NPI number?

Karleung Siu, M.D.'s National Provider Identifier (NPI) is 1649417437, issued on Jan 15, 2009. An NPI identifies a provider in billing; it is not a license.

Where is Karleung Siu, M.D. located?

The NPPES record lists a practice address at 718 Teaneck RD, Teaneck, NJ, 07666. Phone: (201) 227-6008. Providers update this record themselves, so call before visiting.

How can I verify Karleung Siu, M.D.'s license?

NPPES lists New Jersey license number 25MA09153700, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Karleung Siu, M.D. prescribe under Medicare Part D?

In 2024, Karleung Siu, M.D. had 1,463 Medicare Part D claims for 225 beneficiaries; the average among hematology (internal medicine) physician prescribers was 496. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.