1. Home
  2. Directory
  3. Wisconsin
  4. Waukesha
  5. Counselor
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DIANE M OMAN MS LCSW
NPI 1346223740
Counselor - Mental Health in Waukesha, WI

Active since November 21, 2005
741 N GRAND AVE, STE 210, WAUKESHA, WI 53186(262) 547-2463(262) 547-8002 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

About Diane M Oman Ms Lcsw NPPES

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

DIANE M OMAN MS LCSW (NPI 1346223740) is an individual mental health provider in Waukesha, Wisconsin and active in the NPI registry since November 2005.

NPPES Registry Identity

NPI1346223740
Entity TypeIndividualFemale
Primary Taxonomy101YM0800X
Provider Legal NameDIANE M OMANCredential: MS LCSW
Location Address741 N GRAND AVE, STE 210Waukesha, WI 53186-4820
Mailing Address741 N Grand Ave, Ste 210Waukesha, WI 53186-4820 · (262) 547-2463 · Fax (262) 547-8002
Phone(262) 547-2463
Fax(262) 547-8002
Sole ProprietorNo
Enumeration DateNovember 21, 2005
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1346223740 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
Also ListedCounselor · ProfessionalTaxonomy 101YP2500X · License 481125 (WI)
Also ListedSocial Worker · ClinicalTaxonomy 1041C0700X · License 1674123 (WI)
741 N GRAND AVE, Waukesha, WI 53186
Open in Google Maps ↗

Other Identifiers 1

Medicaid39188900WI

Other Providers at the Same Location NPPES 12

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

CORNERSTONE COUNSELING SERVICES
Community/Behavioral Health
741 N GRAND AVE, SUITE 302
WAUKESHA, WI 53186
Waukesha County (262) 542-3255
KARALYNN ROYSTER M.A.
Counselor (Mental Health)
741 N GRAND AVE, SUITE 302
WAUKESHA, WI 53186
Waukesha County (262) 789-1191
BETTY M QUINN LPC
Counselor (Professional)
741 N GRAND AVE, SUITE 302
WAUKESHA, WI 53186
Waukesha County (262) 542-3255
MICHAEL CARL SHORT MSW,LCSW
Counselor (Mental Health)
741 N GRAND AVE
WAUKESHA, WI 53186
Waukesha County (262) 542-3255
MS. PAMELA ANN BILODEAU MS LPC
Counselor (Professional)
741 N GRAND AVE, STE 302
WAUKESHA, WI 53186
Waukesha County (262) 542-3255
JENNIFER VANROSSUM LPC
Counselor (Professional)
741 N GRAND AVE, SUITE 302
WAUKESHA, WI 53186
Waukesha County (262) 542-3255
DR. BARRY BLACKWELL MD
Psychiatry & Neurology (Psychiatry)
741 N GRAND AVE, #210
WAUKESHA, WI 53186
Waukesha County (262) 547-2463
EDWARD L COHEN LCSW
Social Worker (Clinical)
741 N GRAND AVE, SUITE 302
WAUKESHA, WI 53186
Waukesha County (262) 542-3255

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 Diane Oman's NPI number?

The NPI number for Diane Oman is 1346223740. It was assigned to this individual provider in the NPPES registry on November 21, 2005.

Where is Diane Oman located?

Diane Oman practices at 741 N Grand Ave Ste 210, Waukesha, WI 53186. The listed phone number is (262) 547-2463.

What is Diane Oman's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

When was this NPI record last updated?

The NPPES record for Diane Oman was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 40 days 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.