NPI Portal NPI Lookup & Verification

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

Dr. Waldo C. Feng, M.D.

Pediatric Urology Physician in Las Vegas, NV · enumerated 2005.

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

National Provider Identifier

1639169774

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Registry record

Entity type Individual (Type 1)
Name Dr. Waldo C. Feng
Credential M.D.
Sex Male
Practice address Las Vegas, NV, 89169
Phone (702) 916-1996
Fax (702) 916-1997
Enumeration date Oct 27, 2005
Last updated in NPPES Mar 17, 2018

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

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 10623 (NV) Secondary
2088P0231X Pediatric Urology Physician Allopathic & Osteopathic Physicians · License NV10623 (NV) 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
100500681 Medicaid NV -

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 is the NPI number for Waldo Feng?
The National Provider Identifier (NPI) for Waldo Feng is 1639169774, a Type 1 (individual) record in the CMS NPPES registry.
Where does Waldo Feng practice?
The practice location on file with NPPES is in Las Vegas, NV. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-17.