NPPES file of Aug 9, 2026

Bay Hematology Oncology

Bay Hematology Oncology holds 7 active organization NPIs in the federal registry, with practice locations in 2 Maryland cities. Each location can bill under its own NPI.

CMS NPPES registry, file of Aug 9, 2026 · legal names grouped after punctuation and "LLC" are removed · method · Verify with CMS →

Which NPI is yours?

Search the organization with your city to find the NPI for the location you visit or bill.

Find a location's NPI

Centreville has the most NPIs, 5

  1. Centreville5
  2. Easton2

Source: CMS NPPES monthly file of Aug 9, 2026, organization NPIs by practice city.

Most NPIs were issued in 2006 and 2017

Bay Hematology Oncology NPIs by year issued2006: 1, 2007: 0, 2008: 1, 2009: 0, 2010: 0, 2011: 0, 2012: 0, 2013: 0, 2014: 0, 2015: 0, 2016: 0, 2017: 50246200620072008200920102011201220132014201520162017151
Bay Hematology Oncology NPIs by year issued2006: 1, 2007: 0, 2008: 1, 2009: 0, 2010: 0, 2011: 0, 2012: 0, 2013: 0, 2014: 0, 2015: 0, 2016: 0, 2017: 50246200620072008200920102011201220132014201520162017151
Bay Hematology Oncology NPIs by year issued2006: 1, 2007: 0, 2008: 1, 2009: 0, 2010: 0, 2011: 0, 2012: 0, 2013: 0, 2014: 0, 2015: 0, 2016: 0, 2017: 502462007200920112013201520172006: 151

Source: CMS NPPES, enumeration dates.

5 NPIs were issued in 2017 alone, more than in any other year; none in 9 of the years between.

Centreville locations

The city with the most Bay Hematology Oncology NPIs. The full list of all 7 follows.

NPILocationPrimary taxonomyIssued
19124458752977 4H PARK RD SUITE 102, CentrevilleSpecialistFeb 10, 2017
18912346882977 4H PARK RD SUITE 102, CentrevilleSpecialistFeb 14, 2017
18710324092977 4H PARK RD SUITE 102, CentrevilleAdult Health Nurse PractitionerFeb 15, 2017
16699112932977 4H PARK RD SUITE 102, CentrevilleOncology Clinic/CenterFeb 15, 2017
19629415752977 4H PARK RD SUITE 102, CentrevilleFamily Nurse PractitionerFeb 15, 2017
All 7 locations, by city
NPILocationPrimary taxonomyIssued
19124458752977 4H PARK RD SUITE 102, CentrevilleSpecialistFeb 10, 2017
18912346882977 4H PARK RD SUITE 102, CentrevilleSpecialistFeb 14, 2017
18710324092977 4H PARK RD SUITE 102, CentrevilleAdult Health Nurse PractitionerFeb 15, 2017
16699112932977 4H PARK RD SUITE 102, CentrevilleOncology Clinic/CenterFeb 15, 2017
19629415752977 4H PARK RD SUITE 102, CentrevilleFamily Nurse PractitionerFeb 15, 2017
10433215328221 TEAL DR SUITE 301, EastonSpecialistAug 31, 2006
13868116288221 TEAL DR STE 301, EastonOncology Clinic/CenterMay 15, 2008

Checking an organization

  1. Match the NPI to the exact location you will visit or bill; each location can have its own.
  2. Confirm the business entity with the secretary of state.
  3. Check the HHS-OIG exclusion list for the organization and its owners.
  4. Verify each clinician you will see on their own record and with the state license search.

Common questions

Why does Bay Hematology Oncology have 7 NPIs?

An organization may obtain more than one Type 2 NPI, for example for separate locations or units that bill on their own. Bay Hematology Oncology's NPIs list practice locations in 2 cities.

Is an organization NPI a license?

No. An NPI identifies who bills. Facilities and the clinicians who work there are licensed separately by the state.

Source: CMS National Plan and Provider Enumeration System (NPPES), monthly file of Aug 9, 2026 (NPPES files on CMS.gov). An NPI identifies who bills; it is not a license.