Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
John F Maslar, D.C.
Chiropractor in Springfield, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1558311381
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Registry record
Entity type Individual (Type 1)
Name John F Maslar
Credential D.C.
Sex Male
Practice address 868 Main St, Springfield, MA, 01103
Phone (413) 736-5491
Fax (413) 746-4632
Enumeration date May 11, 2006
Last updated in NPPES Jul 13, 2026
Taxonomy & licenses
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders.
About the DC credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| Y35043 | Other | MA | BLUECROSS BLUESHIELD |
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
Where does John Maslar practice?
The practice location on file with NPPES is in Springfield, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Maslar?
The National Provider Identifier (NPI) for John Maslar is 1558311381, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Daniel Scicluna Chiropractor · Springfield, MA NPI 1780674978 Paulo Tereso Chiropractor · Springfield, MA NPI 1659321867 Chiropractic Healthcare Centers of Western Mass. Chiropractor · Springfield, MA NPI 1609826833 Andrea Callanan Chiropractor · Springfield, MA NPI 1760432785 John Maslar Chiropractor · Springfield, MA NPI 1881625119 Ergonomic Collaboration Group, LLC Chiropractor · Springfield, MA NPI 1427759562
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-13.