IndividualActive
Mark Ludwig, LCSW
NPI 1245511484 · Clinical Social Worker · Berkeley, CA
Mark Ludwig, LCSW is a Clinical Social Worker provider in Berkeley, CA (NPI 1245511484).
Provider details
- NPI number
- 1245511484
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- 19530 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(81/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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
2246 6th St
Berkeley, CA 94710-2219
Phone: (510) 387-5845
Street-level locationGet directions
Mailing address
201 Highland Ave.
Piedmont, CA 94611
Registry dates
- Enumerated
- 2011-09-01
- Last updated
- 2011-09-01
Frequently asked questions
- What is Mark Ludwig's NPI number?
- Mark Ludwig's National Provider Identifier (NPI) is 1245511484, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Ludwig's specialty?
- Mark Ludwig is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Ludwig located?
- Mark Ludwig's practice location on file with NPPES is 2246 6th St, Berkeley, CA 94710-2219.
- What is Mark Ludwig's phone number?
- The practice phone number listed in the NPPES registry for Mark Ludwig is (510) 387-5845.
- Is Mark Ludwig's NPI active?
- Yes — Mark Ludwig's NPI (1245511484) is active in the NPPES registry as of the last update on 2011-09-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.