Ms. Angela Dawn Tierno Blackthorne

Ms. Angela Dawn Tierno Blackthorne is a Addiction (Substance Use Disorder) Counselor provider (Counselor) practicing in Eureka, CA, registered in the NPPES registry with NPI 1215537998 since 2020.

✓ Active NPI ✓ Valid NPI checksum

NPI	1215537998
Entity type	Individual (Type 1)
Name	Ms. Angela Dawn Tierno Blackthorne
Sex	Female
Practice address	720 WOOD ST, Eureka, CA, 95501
Phone	7072682990
Enumeration date	2020-10-30
Last updated in NPPES	2020-10-30

Taxonomy & licenses

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

Copy-ready billing details

Provider: Angela Blackthorne
NPI: 1215537998
Taxonomy: 101YA0400X (Addiction (Substance Use Disorder) Counselor)
Address: 720 WOOD ST, Eureka, CA, 95501

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1922925858	Eric Hanson	Individual	Day Training/Habilitation Specialist	Eureka, CA
1558287284	Sebastian Vaudiau	Individual	Community Health Worker	Eureka, CA
1780646521	Janese Charpentier	Individual	Psychiatric/Mental Health Nurse Practitioner	Eureka, CA
1194763219	County of Humboldt	Organization	Psychiatric Hospital Unit	Eureka, CA
1407873268	Marian Vasilevich	Individual	Marriage & Family Therapist	Eureka, CA
1417971946	Steve Roth	Individual	Clinical Psychologist	Eureka, CA
1710070966	Evelyn Doyle	Individual	Family Nurse Practitioner	Eureka, CA
1982799458	Mark Sussman	Individual	Clinical Social Worker	Eureka, CA

Verify this record

Cross-check NPI 1215537998 against the authoritative CMS record: view Ms. Angela Dawn Tierno Blackthorne 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

What specialty is Angela Blackthorne?

Angela Blackthorne 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.

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.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2020-10-30.