William Roy Ives

William Roy Ives is a Addiction (Substance Use Disorder) Counselor provider (Counselor) practicing in Ithaca, NY, registered in the NPPES registry with NPI 1598023053 since 2012. Practices at Alcohol & Drug Council of Tompkins County, Inc. (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum

NPI	1598023053
Entity type	Individual (Type 1)
Name	William Roy Ives
Sex	Male
Practice address	201 E GREEN ST STE 500, Ithaca, NY, 14850
Phone	6072746288
Enumeration date	2012-05-02
Last updated in NPPES	2012-05-02

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
101YA0400X	Addiction (Substance Use Disorder) Counselor	Primary	—	—

Copy-ready billing details

Provider: William Ives
NPI: 1598023053
Taxonomy: 101YA0400X (Addiction (Substance Use Disorder) Counselor)
Address: 201 E GREEN ST STE 500, Ithaca, NY, 14850

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1194744227	Alcohol & Drug Council of Tompkins County, Inc.	Organization	Substance Use Disorder Rehabilitation Clinic/Center	Ithaca, NY
1841360682	Thomas Lipa	Individual	Addiction (Substance Use Disorder) Counselor	Ithaca, NY
1598995797	Cheryl Powell	Individual	Addiction (Substance Use Disorder) Counselor	Ithaca, NY
1730400508	Tammy Borrelli	Individual	Addiction (Substance Use Disorder) Counselor	Ithaca, NY
1861866691	Adrienne Lamb	Individual	Addiction (Substance Use Disorder) Counselor	Ithaca, NY
1588013585	Alison Bliss	Individual	Addiction (Substance Use Disorder) Counselor	Ithaca, NY
1891247359	Amy Graham	Individual	Addiction (Substance Use Disorder) Counselor	Ithaca, NY
1053863506	Vanessa Hendrickson	Individual	Addiction (Substance Use Disorder) Counselor	Ithaca, NY

Verify this record

Cross-check NPI 1598023053 against the authoritative CMS record: view William Roy Ives on the official NPPES registry .

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 or validate an NPI number.

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 William Ives?

William Ives is registered in NPPES with the primary taxonomy of Addiction (Substance Use Disorder) Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2012-05-02.