Katherine Laura Olshan, MD
Pediatric Gastroenterology Physician · Worcester, MA
Katherine Laura Olshan, MD is a pediatric gastroenterology physician with a practice address in Worcester, Massachusetts, and NPI 1932596855, issued on Apr 17, 2015. Check the license (Massachusetts 263752, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Katherine Laura Olshan
- Credential
- MD
- Primary taxonomy
- Pediatric Gastroenterology Physician 2080P0206X
- License number
- 263752 MA
Self-reported in NPPES; status is on the state search - Practice location
- 55 Lake Ave N, Worcester, MA 01655
- Phone
- (508) 334-1000
- Enumerated
- Apr 17, 2015
- Record last updated
- Jun 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210910002253); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 2015
- Entity
- Type 1 · individual
Also registered at 55 Lake Ave N
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nawal Aamir, MDInternal Medicine Physician1588248926
- Amarys Abadie, CRNACertified Registered Nurse Anesthetist1992936843
- Paula Abate, NPNurse Practitioner1336265909
- Aly AbayazeedDiagnostic Radiology Physician1821221946
- Zainab AbbasDermatology Physician1609028000
- Mary-Alice Abbott, MDClinical Genetics (M.D.) Physician1982799417
Verify Katherine Laura Olshan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 263752Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Massachusetts General Physicians Organization IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Pediatric Gastroenterology Physician providers in Massachusetts
There are 135 pediatric gastroenterology physician records in Massachusetts.
Other pediatric gastroenterology physician records in Massachusetts
- Charalampos Agakidis, MDBoston, MA1508138173
- Awab Ali Ibrahim, MDBoston, MA1871987800
- Anastasios Angelides, MDSpringfield, MA1265413009
- Corey Baker, M.D.Boston, MA1588000301
- Sonia Ballal, M.D.Boston, MA1578618435
- Beate Beinvogl, MD, MPHBoston, MA1881935153
- Jaime Belkind-Gerson, M.D., MSCBoston, MA1609193440
- Tal BergerBoston, MA1184346967
- Elana Bern, MD, MPHBoston, MA1598785727
- Jeffrey Biller, MDWaltham, MA1467443259
Common questions
What is Katherine Laura Olshan, MD's NPI number?
Katherine Laura Olshan, MD's National Provider Identifier (NPI) is 1932596855, issued on Apr 17, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Laura Olshan, MD located?
The NPPES record lists a practice address at 55 Lake Ave N, Worcester, MA, 01655. Phone: (508) 334-1000. Providers update this record themselves, so call before visiting.
How can I verify Katherine Laura Olshan, MD's license?
NPPES lists Massachusetts license number 263752, 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.
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.