Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Boyan Hadjiev, M.D.

Allergy & Immunology Physician in New York, NY · enumerated 2006.

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

National Provider Identifier

1851354997

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Registry record

Entity type Individual (Type 1)

Name Dr. Boyan Hadjiev

Credential M.D.

Sex Male

Practice address New York, NY, 10016

Phone (212) 679-1200

Fax (212) 679-3494

Enumeration date Apr 10, 2006

Last updated in NPPES Jul 13, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 228879 (NY) Secondary

207RA0201X Allergy & Immunology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 228879 (NY) Secondary

2080P0201X Pediatric Allergy/Immunology Physician Allopathic & Osteopathic Physicians · License 228879 (NY) Secondary

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License 228879 (NY) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1851354997 active?

Yes, as of the latest NPPES snapshot, NPI 1851354997 is active (record last updated 2023-07-13).

How do I verify Boyan Hadjiev's NPI record?

Cross-check NPI 1851354997 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-07-13.