NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Choi, DO

Diagnostic Radiology Physician in Berwyn, IL · enumerated 2005.

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

National Provider Identifier

1982690830

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mark Choi
Credential DO
Sex Male
Practice address 3249 Oak Park Ave, Metropolitan Advanced Radiological Services, Ltd, Berwyn, IL, 60402
Fax (708) 783-3164
Enumeration date Sep 26, 2005
Last updated in NPPES Apr 16, 2008

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 02002962 (IN) Secondary
2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 46602-021 (WI) Secondary
2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License DO1391 (NV) Secondary
2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 34.009265 (OH) Secondary
2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
P00455855 Other IL MEDICARE RAILROAD

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

What specialty is Mark Choi?
Mark Choi is registered in NPPES with the primary taxonomy of Diagnostic Radiology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-04-16.