Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark S Loewen, M.D.
Surgery Physician in Hyannis, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1295747319
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark S Loewen
Credential M.D.
Sex Male
Practice address 40 Lewis Bay Rd, Hyannis, MA, 02601
Phone (508) 775-0800
Fax (508) 771-8565
Enumeration date Aug 13, 2006
Last updated in NPPES Sep 23, 2008
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 |
|---|---|---|---|
| P00427689 | Other | - | RAILROAD MEDICARE |
| 2713608 | Other | - | UNITEDHEALTHCARE |
| AA82270 | Other | - | HPHC |
| J41321 | Other | MA | BC/BS |
| 2133750 | Medicaid | MA | - |
| 1617292 | Other | - | CIGNA |
| 496072 | Other | MA | TUFTS |
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
Is NPI 1295747319 active?
Yes, as of the latest NPPES snapshot, NPI 1295747319 is active (record last updated 2008-09-23).
How do I verify Mark Loewen's NPI record?
Cross-check NPI 1295747319 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-09-23.