Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Amiethab Aiyer, M.D.

Orthopaedic Surgery Physician in Baltimore, MD · enumerated 2008.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1386805935

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Registry record

Entity type Individual (Type 1)

Name Amiethab Aiyer

Credential M.D.

Sex Male

Practice address 4940 Eastern Ave, Baltimore, MD, 21224

Phone (410) 550-0452

Fax (410) 550-2899

Enumeration date Jun 17, 2008

Last updated in NPPES Jul 29, 2021

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License MT193783 (PA) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License ME125262 (FL) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License D76896 (MD) Primary

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.

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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 Amiethab Aiyer?

Amiethab Aiyer is registered in NPPES with the primary taxonomy of Orthopaedic Surgery 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 2021-07-29.