Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sideris David Baer, M.D.

Internal Medicine Physician in Ipswich, MA · enumerated 2006 · practices at Sideris D. Baer, M.D..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1942249370

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Registry record

Entity type Individual (Type 1)

Name Sideris David Baer

Credential M.D.

Sex Male

Practice address 92 Central St, Ipswich, MA, 01938

Phone (978) 356-4884

Enumeration date Jun 4, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 42200 (MA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
D12024	Other	MA	BLUE CROSS/BLUE SHIELD
0470039	Other	MA	USHC
32031	Other	MA	FALLON HEALTHCARE
0152366	Medicaid	MA	-
62251	Other	MA	HARVARD PILGRIM HEALTH CA
713595	Other	MA	TUFTS HEALTH CARE

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How do I verify Sideris Baer's NPI record?

Cross-check NPI 1942249370 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1942249370 active?

Yes, as of the latest NPPES snapshot, NPI 1942249370 is active (record last updated 2007-07-08).

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Sideris D. Baer, M.D. Internal Medicine Physician · Ipswich, MA NPI 1518904085

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.