Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mehmet Esat Demirhan, MD
Hospitalist Physician in Boston, MA · enumerated 2020.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1619504719
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Registry record
Entity type Individual (Type 1)
Name Mehmet Esat Demirhan
Credential MD
Sex Male
Practice address 375 Longwood Ave, Boston, MA, 02215
Phone (617) 632-9755
Enumeration date Mar 26, 2020
Last updated in NPPES Jun 29, 2023
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
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 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.
What specialty is Mehmet Demirhan?
Mehmet Demirhan is registered in NPPES with the primary taxonomy of Hospitalist Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-06-29.