What is William Marks's NPI number?

William Marks's National Provider Identifier (NPI) is 1962363408, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Marks's specialty?

William Marks is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).

Where is William Marks located?

William Marks's practice location on file with NPPES is 6999 Reisterstown Rd Ste 3, Baltimore, MD 21215-1492.

What is William Marks's phone number?

The practice phone number listed in the NPPES registry for William Marks is (667) 600-3210.

Is William Marks's NPI active?

Yes — William Marks's NPI (1962363408) is active in the NPPES registry as of the last update on 2025-11-25.

IndividualActive

William Marks

NPI 1962363408 · Social Worker · Baltimore, MD

William Marks is a Social Worker provider in Baltimore, MD (NPI 1962363408).

Provider details

NPI number: 1962363408
Entity type: Individual
Primary specialty: Social WorkerBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: No

Specialties & taxonomies

Social WorkerPrimary104100000X
Behavioral Health & Social Service Providers

Profile Score

Basic profile(47/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
Under 1 yr in registry
Profile completeness38% of score
83% 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

6999 Reisterstown Rd Ste 3

Baltimore, MD 21215-1492

Phone: (667) 600-3210

Street-level locationGet directions

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Mailing address