Alan W. Tseng, MD, PHD
Hematology (Internal Medicine) Physician · Northampton, MA
Alan W. Tseng, MD, PHD is a hematology (internal medicine) physician with a practice address in Northampton, Massachusetts, and NPI 1518420520, issued on Apr 8, 2019. Check the license (Massachusetts 1024260, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Alan W. Tseng
- Credential
- MD, PHD
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- License number
- 1024260 MA
Self-reported in NPPES; status is on the state search - Practice location
- 30 Locust St, Northampton, MA 01060
- Phone
- (413) 582-2900
- Enumerated
- Apr 8, 2019
- Record last updated
- Aug 1, 2025
- Medicare enrollment
- Enrolled (PECOS I20250731001803); accepts Medicare assignment
- Medical or professional school
- Louisiana State University School Of Medicine In New Orleans, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology (internal medicine) physician records → All 117 in Massachusetts → Look up another NPI →
Also registered at 30 Locust St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Timothy Abbott, D.O.Anesthesiology Physician1316155294
- Olyn Andrade, MDEmergency Medicine Physician1265008544
- Nasreen Azam, M.D.Pediatric Nephrology Physician1649362476
- Mae Beckford-Bruno, RNStudent in an Organized Health Care Education/Training Program1043134661
- Linda Benoit, LICSWClinical Social Worker1588729610
- Charles Bernstein, MDDiagnostic Radiology Physician1699734442
Verify Alan W. Tseng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1024260Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average hematology (internal medicine) physician in 2024
227 Medicare Part D claims for 41 beneficiaries, against an average of 496 among the 1,036 providers of this specialty who prescribed in Part D. 19 claims were for opioids.
Most prescribed
- Abiraterone Acetate20 claims
- Prednisone15 claims
- Ibrance13 claims
- Olanzapine11 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.
Industry payments in 2024: $881.72
14 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 721 providers of this specialty with any payment received $13,778.35 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mass General Brigham Medical Group Western Massachusetts IncNorthampton, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alan W. Tseng among 117 hematology (internal medicine) physician records in Massachusetts
Alan W. Tseng, MD, PHD is one of 117 hematology (internal medicine) physician records with a practice address in Massachusetts. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 88% of them.
- NPI issued2019 · 88% of these records are older, 4% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2018 · median 2006 among the 77 with a school on file
- Record last updated2025 · 43% 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 Massachusetts 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 Massachusetts
There are 117 hematology (internal medicine) physician records in Massachusetts.
All 117 in Massachusetts → Every provider in Northampton → Hematology (Internal Medicine) Physician nationwide →
The 8 hematology (internal medicine) physician records with the nearest ZIP codes
- Lois KamugishaNorthampton, MA 010601134396948
- Chandravathi Loke, MDSpringfield, MA 011071578530804
- John McCann, MDSpringfield, MA 011071952323271
- Doyun Park, M.D.Springfield, MA 011071982984258
- Richard Steingart, MDSpringfield, MA 011071740202076
- Arthur Church, M.D.Worcester, MA 016041912946252
- Rachel Borson, MDWorcester, MA 016551699759209
- Robert Weinstein, MDWorcester, MA 016551598754269
Common questions
What is Alan W. Tseng, MD, PHD's NPI number?
Alan W. Tseng, MD, PHD's National Provider Identifier (NPI) is 1518420520, issued on Apr 8, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Alan W. Tseng, MD, PHD located?
The NPPES record lists a practice address at 30 Locust St, Northampton, MA, 01060. Phone: (413) 582-2900. Providers update this record themselves, so call before visiting.
How can I verify Alan W. Tseng, MD, PHD's license?
NPPES lists Massachusetts license number 1024260, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alan W. Tseng, MD, PHD prescribe under Medicare Part D?
In 2024, Alan W. Tseng, MD, PHD had 227 Medicare Part D claims for 41 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.
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.