Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark A Jackowitz, M.D.
Specialist in Springfield, MA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1508851411
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark A Jackowitz
Credential M.D.
Sex Male
Practice address 3640 Main St, Suite 205, Springfield, MA, 01107
Phone (413) 739-7367
Fax (413) 737-2686
Enumeration date Sep 16, 2005
Last updated in NPPES May 23, 2014
Taxonomy & licenses
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 |
|---|---|---|---|
| 0115328 | Other | MA | AETNA GROUP NO. |
| J06214 | Other | MA | MASS BLUE SHIELD |
| 0034216003 | Other | MA | CIGNA |
| 010057126MA01 | Other | MA | CONNECTICUT BLUE SHIELD |
| 150664 | Other | MA | HARVARD PILGRIM |
| 032587 | Other | MA | CONNECTICARE |
| 0804490 | Other | MA | UNITED HEALTH CARE |
| 13334 | Other | MA | HEALTH NEW ENGLAND |
| P1500300 | Other | MA | OXFORD HEALTH PLANS |
| 180012328 | Other | MA | RAILROAD MEDICARE |
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 Mark Jackowitz 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 Mark Jackowitz?
The National Provider Identifier (NPI) for Mark Jackowitz is 1508851411, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-05-23.