Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Jan Mashman, M.D.
Neurology Physician in Danbury, CT · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1639174618
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Registry record
Entity type Individual (Type 1)
Name Dr. Jan Mashman
Credential M.D.
Sex Male
Practice address 69 Sand Pit Rd, Ste 300, Danbury, CT, 06810
Phone (203) 748-2551
Fax (203) 790-6375
Enumeration date Jun 16, 2005
Last updated in NPPES Jun 29, 2010
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 |
|---|---|---|---|
| 1139088 | Medicaid | CT | - |
| 010013908CT01 | Other | CT | ANTHEM |
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 is the NPI number for Jan Mashman?
The National Provider Identifier (NPI) for Jan Mashman is 1639174618, a Type 1 (individual) record in the CMS NPPES registry.
Where does Jan Mashman practice?
The practice location on file with NPPES is in Danbury, CT. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Neil Culligan Neurology Physician · Danbury, CT NPI 1649275611 Samuel Markind Neurology Physician · Danbury, CT NPI 1427053404 Diane Wirz Neurology Physician · Danbury, CT NPI 1922003805 John Murphy Neuromusculoskeletal Medicine & OMM Physician · Danbury, CT NPI 1508861279 David Greco Neurology Physician · Danbury, CT NPI 1740285204 Ralph Falkenstein Ophthalmology Physician · Danbury, CT NPI 1730187485 Margaret Marcone Optometrist · Danbury, CT NPI 1427056969 Bruce Altman Glaucoma Specialist (Ophthalmology) Physician · Danbury, CT NPI 1336147784
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-06-29.