Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark T Baetzhold
Social Worker in Cambridge, MA · enumerated 2012.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1285904698
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Registry record
Entity type Individual (Type 1)
Name Mark T Baetzhold
Sex Male
Practice address 678 Massachusetts Ave, Suite 502, Cambridge, MA, 02139
Phone (617) 234-5340
Fax (617) 234-5344
Enumeration date Jan 3, 2012
Last updated in NPPES Jan 3, 2012
Taxonomy & licenses
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.
Frequently asked questions
What specialty is Mark Baetzhold?
Mark Baetzhold is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-03.