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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David J Haidak, M.D.

Hematology & Oncology Physician in Clinton, MD · enumerated 2005.

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

National Provider Identifier

1215933221

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Registry record

Entity type Individual (Type 1)
Name David J Haidak
Credential M.D.
Sex Male
Practice address 8926 Woodyard Rd, Ste 201, Clinton, MD, 20735
Phone (301) 868-7911
Fax (301) 868-2285
Enumeration date Jun 23, 2005
Last updated in NPPES May 15, 2008

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License D0017605 (MD) Primary
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
02810004 Other DC BC/BS OF DC
004052732 Other - AETNA MNG
493216 Other - HEALTHLINK
830001307 Other - RR MEDICARE
830004072 Other - RR MEDICARE
086401 Other - CIGNA
3000017 Other - UNITED HEALTHCARE
324510 Other - MAMSI
481545 Other - AETNA HMO
B6480002 Other DC BC/BS OF DC
022118900 Medicaid DC -
32300002 Other - BC/BS OF MD - CLINTON
32300003 Other - BC/BS OF MD - GREENBELT
324510 Other - ALLIANCE
058810 Other - TRIGON
04701 Other - AMERICAID
20096 1700 Medicaid MD -

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 David Haidak?
David Haidak is registered in NPPES with the primary taxonomy of Hematology & Oncology 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 2008-05-15.