npidata.org
Products
Provider RadarWatch an area and specialty — weekly alerts on new cliniciansPractice RadarWeekly alerts when new organisations register nearbyPhysician listsMDs and DOs with addresses and phone numbersNP listsNurse practitioners, the fastest-growing groupAPIJSON, delta feed, free tier
Use cases
Healthcare sales prospectingPhysician recruiting and locum staffingMedical device sales territory planningCredentialing and provider verificationHealthcare marketing lists and audience buildingPharmaceutical sales and prescriber targeting
Account
Start freeThree radars and an export a month Sign in Pricing
Explore
Data Labs Specialties States API

Search › Massachusetts › Gastroenterology Physician

Erik Holzwanger, M.D

NPI 1457747776 · on the registry since 2015

Practice

Address
800 Washington St
Boston, MA 02111
Phone
(617) 636-5000
Organisation at this address
Tufts Medical Center
Tufts Medical Center
Tufts Medical Center
Tufts Medical Center
Tufts Medical Center
Inferred from a shared address, not stated in the registry.
Clinicians at this address
1,483

Additional practice sites

  • 55 Lake Ave N, Worcester, MA
  • 736 Cambridge St, Brighton, MA

Registry record

Primary taxonomy
Gastroenterology Physician
207RG0100X
Licence states on file
MA
From the registry's licence fields, which are often incomplete.
Sex
Male
Record last updated
2026-01-05

Source: CMS National Plan and Provider Enumeration System. Registration is not the same as practising, and the registry records no retirement — some people listed here no longer practise. More in Massachusetts