Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William K Halstenberg, MD

Internal Medicine Physician in Asheville, NC · enumerated 2005.

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

National Provider Identifier

1699770685

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Registry record

Entity type Individual (Type 1)

Name Dr. William K Halstenberg

Credential MD

Sex Male

Practice address 509 Biltmore Ave, Asheville, NC, 28801

Phone (828) 213-4411

Fax (866) 285-9740

Enumeration date Jun 16, 2005

Last updated in NPPES Oct 21, 2015

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 9400820 (NC) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 9400820 (NC) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 9400820 (NC) 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
38517	Other	NC	BCBS
390003720	Other	NC	RR MEDICARE
8938517	Medicaid	NC	-

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 NPI 1699770685 active?

Yes, as of the latest NPPES snapshot, NPI 1699770685 is active (record last updated 2015-10-21).

How do I verify William Halstenberg's NPI record?

Cross-check NPI 1699770685 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-10-21.