Mary Margaret O'Neil, M.S., MFT
Marriage & Family Therapist · Walnut Creek, CA
Mary Margaret O'Neil, M.S., MFT is a marriage & family therapist with a practice address in Walnut Creek, California, and NPI 1699827782, issued on Jan 17, 2007. Check the license (California 17024, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mary Margaret O'Neil
- Credential
- M.S., MFT
- Primary taxonomy
- Marriage & Family Therapist 106H00000X
- License number
- 17024 CA
Self-reported in NPPES; status is on the state search - Practice location
- 710 S Broadway, Walnut Creek, CA 94596
- Phone
- (925) 295-5371
- Enumerated
- Jan 17, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Also registered at 710 S Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Julia Avedisian-Aguilar, MFTMarriage & Family Therapist1972614162
- Nardine Azab, MFTMental Health Counselor1417120106
- Jennifer Barkin, PSY.D.Clinical Psychologist1043476468
- Jessica Bergstrom, PSY.D.Clinical Psychologist1508333618
- Isabella BluminBehavior Technician1932716115
- Vince Brim, PSY.D.Clinical Psychologist1932378965
Verify Mary Margaret O'Neil in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 17024Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
315 marriage & family therapist records list a practice address in Walnut Creek
They are 315 of the 6,170 NPPES records with a practice address in Walnut Creek, and 59,889 marriage & family therapist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 315 in Walnut Creek → All 59,889 in California → Every provider in Walnut Creek →
Other marriage & family therapist records in California
- Lili Aames, LMFTSanta Fe Springs, CA1689836165
- Lynn Aamot, LMFTEl Dorado Hills, CA1508255027
- Nathan Aanderud, LMFTTorrance, CA1689036907
- Alex AaronSherman Oaks, CA1578442620
- Bianca Aaron, LMFT, APCCSan Francisco, CA1316459605
- Kelley Aaron, MFTLos Angeles, CA1699068866
- Ruth Aaron, MS, JD, MFTClaremont, CA1316029697
- Terry Aaron, MFTBurbank, CA1386801173
- Azadeh Aarons, LMFTThousand Oaks, CA1679343974
- Bianca Aarons, MA,LMFTSan Francisco, CA1699286732
Common questions
What is Mary Margaret O'Neil, M.S., MFT's NPI number?
Mary Margaret O'Neil, M.S., MFT's National Provider Identifier (NPI) is 1699827782, issued on Jan 17, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mary Margaret O'Neil, M.S., MFT located?
The NPPES record lists a practice address at 710 S Broadway, Walnut Creek, CA, 94596. Phone: (925) 295-5371. Providers update this record themselves, so call before visiting.
How can I verify Mary Margaret O'Neil, M.S., MFT's license?
NPPES lists California license number 17024, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.