Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. William Mack Hang, DDS, MSD

Individual provider Orthodontics and Dentofacial Orthopedics Dentistry · NPI 1003983149

Dr. William Mack Hang, DDS, MSD practises Orthodontics and Dentofacial Orthopedics Dentistry in Westlake Village, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
What do these letters mean?
DDS — Doctor of Dental Surgery
A dentist. DDS and DMD are the same qualification — universities choose which title to award.

See every abbreviation used in this directory →

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Practice location Address checks out

101 N Westlake Blvd Ste 202
Westlake Village, CA 91362-3753 Not confirmed with CMS for 19 years — call before visiting
Phone: (805) 374-9377
Fax: (805) 446-9157
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Orthodontics and Dentofacial Orthopedics Dentistry (primary) Taxonomy 1223X0400X · Licence 39271 (CA)

Record details

NPI number1003983149
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS , MSD
Sole proprietorNo
NPI enumeratedNovember 30, 2006
Last updated in NPPESJuly 8, 2007

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Gift $1,000 1 payment

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

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