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DIANA NORTHNESS LMFT
NPI 1902464209
Marriage & Family Therapist in Windsor, CA

Active since May 31, 2019Opted out of Medicare · through Jan 1, 2028
8911 LAKEWOOD DR, WINDSOR, CA 95492(805) 232-4161 Get Directions Write a Review

NPPES record last updated: April 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 13, 2026, May 31, 2019 (2 updates tracked since 2019).

About Diana Northness Lmft NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DIANA NORTHNESS LMFT (NPI 1902464209) is an individual marriage & family therapist in Windsor, California, licensed in California (110394) and active in the NPI registry since May 2019. She has opted out of Medicare through January 1, 2028.

NPPES Registry Identity

NPI1902464209
Entity TypeIndividualFemale
Primary Taxonomy106H00000X
Provider Legal NameDIANA NORTHNESSCredential: LMFT
Location Address8911 LAKEWOOD DRWindsor, CA 95492-7856
Mailing Address8911 Lakewood Dr Ste 24cWindsor, CA 95492-7856 · (805) 232-4161
Phone(805) 232-4161
Sole ProprietorYes
Enumeration DateMay 31, 2019
Last NPPES UpdateApril 13, 20262 updates tracked since enumeration
NPPES CertifiedApril 13, 2026
✔ NPI 1902464209 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyMarriage & Family TherapistBehavioral Health & Social Service Providers
Taxonomy Code106H00000X
License✔ Licensed in CA · 110394
Definition
A marriage and family therapist is a person with a master's degree in marriage and family therapy, or a master's or doctoral degree in a related mental health field with substantially equivalent coursework in marriage and family therapy, who receives supervised clinical experience, or a person who meets the state requirements to practice as a marriage and family therapist. A marriage and family therapist treats mental and emotional disorders within the context of marriage and family systems. A marriage and family therapist provides mental health and counseling services to individuals, couples, families, and groups.
8911 LAKEWOOD DR, Windsor, CA 95492
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Diana Northness Lmft has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from January 1, 2024 through January 1, 2028.

Opt-Out Effective DateJanuary 1, 2024
Opt-Out In Effect ThroughJanuary 1, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SUSAN MICHELLE GREENE MA, MFT
Marriage & Family Therapist
8911 LAKEWOOD DR, SUITE 24D
WINDSOR, CA 95492
Sonoma County (707) 604-6943
MRS. KIMBERLY MACHELE LYONS OD
Optometrist
8911 LAKEWOOD DR, STE. 11
WINDSOR, CA 95492
Sonoma County (707) 838-9393
LAURA THERESE KIMBRO DO
Obstetrics & Gynecology (Gynecology)
8911 LAKEWOOD DR, SUITE 23
WINDSOR, CA 95492
Sonoma County (707) 892-2146
FRANCES DEE FILGAS MD
Specialist
8911 LAKEWOOD DR, SUITE 23
WINDSOR, CA 95492
Sonoma County (707) 837-8400
PATRICIA ASTON M.A.
Marriage & Family Therapist
8911 LAKEWOOD DR, SUITE 24F
WINDSOR, CA 95492
Sonoma County (707) 228-5334
KIMBERLY LYONS OD A PROFESSIONAL OPTOMETRIC CORPORATION
Optometrist
8911 LAKEWOOD DR, SUITE 11
WINDSOR, CA 95492
Sonoma County (707) 838-9393

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Diana Northness's NPI number?

The NPI number for Diana Northness is 1902464209. It was assigned to this individual provider in the NPPES registry on May 31, 2019.

Where is Diana Northness located?

Diana Northness practices at 8911 Lakewood Dr, Windsor, CA 95492. The listed phone number is (805) 232-4161.

What is Diana Northness's specialty?

The primary specialty registered for this NPI is Marriage & Family Therapist with taxonomy code 106H00000X.

Is Diana Northness enrolled in Medicare?

No. Diana Northness has opted out of Medicare through January 1, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

What insurance does Diana Northness accept?

Health plans from Providence Health Plan list Diana Northness as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Diana Northness was last updated on April 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.