Ronald Mah, M.A.
NPI 1821022591 · Mental Health Counselor · San Leandro, CA
Ronald Mah, M.A. is a Mental Health Counselor provider in San Leandro, CA (NPI 1821022591).
Provider details
- NPI number
- 1821022591
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- M.A.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MFC32136 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-10
- Last updated
- 2007-07-15
Frequently asked questions
- What is Ronald Mah's NPI number?
- Ronald Mah's National Provider Identifier (NPI) is 1821022591, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ronald Mah's specialty?
- Ronald Mah is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Ronald Mah located?
- Ronald Mah's practice location on file with NPPES is 433 Estudillo Ave Ste 305, San Leandro, CA 94577-4915.
- What is Ronald Mah's phone number?
- The practice phone number listed in the NPPES registry for Ronald Mah is (510) 614-5641.
- Is Ronald Mah's NPI active?
- Yes — Ronald Mah's NPI (1821022591) is active in the NPPES registry as of the last update on 2007-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.