Marissa Mannina, PHD, LP
Clinical Psychologist · Walnut Creek, CA
Marissa Mannina, PHD, LP is a clinical psychologist with a practice address in Walnut Creek, California, and NPI 1790922532, issued on Jan 15, 2009. Check the license (California 24937, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marissa Mannina
- Credential
- PHD, LP
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- 24937 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2970 Camino Diablo Ste 300, Walnut Creek, CA 94597
- Phone
- (925) 282-1778
- Enumerated
- Jan 15, 2009
- Record last updated
- Jul 14, 2025
- Fax
- (415) 296-5299
- Medicare enrollment
- Enrolled (PECOS I20121004000291); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 12,647 in California → Look up another NPI →
Also registered at 2970 Camino Diablo Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennifer Blum, PSYDClinical Psychologist1366820474
- Cindy Bolter, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1245459544
- Andrea Brackett, PMHNPPsychiatric/Mental Health Nurse Practitioner1457802068
- Maria Emma Castro Lacouture, M.D.Psychiatry Physician1043469687
- Keren Dietz Roberts, PMHNPPsychiatric/Mental Health Nurse Practitioner1487319786
- Deborah Sue Duell-Stephens, LMFTMarriage & Family Therapist1609166750
Verify Marissa Mannina in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 24937Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Pacific Coast Psychiatric Associates IncSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marissa Mannina among 12,647 clinical psychologist records in California
Marissa Mannina, PHD, LP is one of 12,647 clinical psychologist records with a practice address in California. 9% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 49% of them.
- NPI issued2009 · 49% of these records are older, 46% newer
- In a Medicare fileYes · 9% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated2006 · median 2006 among the 2,424 with a school on file
- Record last updated2025 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
96 clinical psychologist records list a practice address in Walnut Creek
They are 96 of the 6,170 NPPES records with a practice address in Walnut Creek, and 12,647 clinical psychologist records in California.
All 12,647 in California → Every provider in Walnut Creek → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Jennifer Blum, PSYDWalnut Creek, CA 945971366820474
- Spencer Crooks, PSYDWalnut Creek, CA 945971457834301
- Danielle Dollinger, PSYDWalnut Creek, CA 945971427678127
- Karyn Goldberg-Boltz, PH.D.Walnut Creek, CA 945971447385117
- Alicia Grefenson, PSYD, LPWalnut Creek, CA 945971073707451
- Nicole Hermann-Metzger, PSYD, LPWalnut Creek, CA 945971942353578
- Katherine Hughes, PH.D.Walnut Creek, CA 945971548302409
- Joseph Koudsi, PSY.D.Walnut Creek, CA 945971649557232
Common questions
What is Marissa Mannina, PHD, LP's NPI number?
Marissa Mannina, PHD, LP's National Provider Identifier (NPI) is 1790922532, issued on Jan 15, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Marissa Mannina, PHD, LP located?
The NPPES record lists a practice address at 2970 Camino Diablo Ste 300, Walnut Creek, CA, 94597. Phone: (925) 282-1778. Providers update this record themselves, so call before visiting.
How can I verify Marissa Mannina, PHD, LP's license?
NPPES lists California license number 24937, 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. Medicare files from data.cms.gov. 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.