What is Nathaniel Mallard's NPI number?

Nathaniel Mallard's National Provider Identifier (NPI) is 1164309969, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Nathaniel Mallard's specialty?

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

Where is Nathaniel Mallard located?

Nathaniel Mallard's practice location on file with NPPES is 4601 Market St, Philadelphia, PA 19139-4636.

What is Nathaniel Mallard's phone number?

The practice phone number listed in the NPPES registry for Nathaniel Mallard is (215) 220-2127.

Is Nathaniel Mallard's NPI active?

Yes — Nathaniel Mallard's NPI (1164309969) is active in the NPPES registry as of the last update on 2025-08-21.

IndividualActive

Nathaniel Mallard

NPI 1164309969 · Social Worker · Philadelphia, PA

Nathaniel Mallard is a Social Worker provider in Philadelphia, PA (NPI 1164309969).

Provider details

NPI number: 1164309969
Entity type: Individual
Primary specialty: Social WorkerBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: Yes
License: SW142961 (PA)

Specialties & taxonomies

Social WorkerPrimary104100000XLicense SW142961 (PA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(54/100 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
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

4601 Market St

Philadelphia, PA 19139-4636

Phone: (215) 220-2127

Street-level locationGet directions

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Mailing address