Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mei Yang, MD

Internal Medicine Physician in Chesterfield, MO · enumerated 2022.

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

National Provider Identifier

1619695053

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Registry record

Entity type Individual (Type 1)

Name Mei Yang

Credential MD

Sex Female

Practice address 224 S Woods Mill Rd Ste 400, Chesterfield, MO, 63017

Phone (314) 205-6050

Fax (314) 205-6350

Enumeration date Aug 22, 2022

Last updated in NPPES Aug 22, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 2022024308 (MO) 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 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 Mei Yang?

Mei Yang is registered in NPPES with the primary taxonomy of Internal Medicine 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 2022-08-22.