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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary Denise Masterson, MHRS

Counselor in Ukiah, CA · enumerated 2008 · practices at Redwood Community Services, Inc..

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

National Provider Identifier

1891940052

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Registry record

Entity type Individual (Type 1)
Name Mary Denise Masterson
Credential MHRS
Sex Female
Practice address 6150 Orr Springs Rd, Ukiah, CA, 95482
Phone (707) 462-5056
Enumeration date Dec 1, 2008
Last updated in NPPES Aug 13, 2010

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers Primary

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

How do I verify Mary Masterson's NPI record?
Cross-check NPI 1891940052 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1891940052 active?
Yes, as of the latest NPPES snapshot, NPI 1891940052 is active (record last updated 2010-08-13).

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