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Mid-County Hematology and Oncology, A Professional Medical Corporation

Hematology & Oncology Physician in Lompoc, CA · enumerated 2010 · authorized official Donna Walker, President.

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

National Provider Identifier

1285959817

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Registry record

Entity type Organization (Type 2)
Legal business name Mid-County Hematology and Oncology, A Professional Medical Corporation
Practice address 1201 E Ocean Ave Ste B, Lompoc, CA, 93436
Phone (805) 735-1155
Fax (805) 735-1133
Enumeration date Apr 7, 2010
Last updated in NPPES Aug 20, 2010

Taxonomy & classification

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Donna Walker
Title President
Phone (805) 735-1155

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.

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Frequently asked questions

What type of organization is Mid-County Hematology and Oncology, A Professional Medical Corporation?
Mid-County Hematology and Oncology, A Professional Medical Corporation is registered in NPPES as a Hematology & Oncology Physician (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-08-20.