Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Addason Fellows Heath Mccaslin, M.D.
Neurology Physician in Chicago, IL · enumerated 2014.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1083032809
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Registry record
Entity type Individual (Type 1)
Name Dr. Addason Fellows Heath Mccaslin
Credential M.D.
Sex Male
Practice address 244 E Pearson St, Apt 1607, Chicago, IL, 60611
Phone (802) 316-1869
Enumeration date Mar 29, 2014
Last updated in NPPES Dec 20, 2021
Taxonomy & licenses
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 125-065307 (IL) Secondary
2084V0102X Vascular Neurology Physician Allopathic & Osteopathic Physicians · License 83186 (SC) Secondary
390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
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 Addason Mccaslin?
Addason Mccaslin is registered in NPPES with the primary taxonomy of Neurology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-20.