Legal entity

Blue Cross and Blue Shield of Massachusetts, Inc.

le:000250·legal entity·top of its tree

Holds directly

Through subsidiaries

Subsidiaries

Held directly, ever

Medicare contracts

Identifiers

Namespace	Value	Valid
`cms_org_name`	Blue Cross and Blue Shield of Massachusetts	2006-08-01 to 2007-12-31
`cms_org_name`	Blue Cross and Blue Shield of Massachusetts, Inc.	2008-01-01 to today
`ein`	041045815	2013-01-01 to today
`naic`	53228	2013-01-01 to today

Owns or controls (3)

Company	Relation	When	Grade
BCBS OF MASSACHUSETTS HMO BLUE, INC.	controlled by	at least since 2012-05-01, still true	B
BLUE CROSS AND BLUE SHIELD OF MA HMO BLUE, INC.	controlled by	at least since 2006-08-01, no end found (last seen 2012-04-30)	B
BLUE CROSS AND BLUE SHIELD OF MASS. HMO BLUE, INC.	controlled by	at least since 2008-01-01, no end found (last seen 2009-12-31)	B

Holds (1)

Instrument	Kind	Since	Grade
Blue Cross and Blue Shield of Massachusetts, Inc. hios:24675	Marketplace issuer	start 2013-01-01	A

Ask about it

resolve_entity(text="Blue Cross and Blue Shield of Massachusetts, Inc.")
describe_entity(entity_id="le:000250", on="2026-10-01")          # owners on a date, holdings, events
describe_entity(entity_id="le:000250", scope="group")            # everything under its top parent

Datasets that carry this company's name as a string (enrollment by parent, Stars by contract, MLR filings) join through these IDs; how_to_join names the key.

This page as markdown: /docs-md/companies/le_000250.md · every page in one file: /llms-full.txt