What is David Tjahjono's NPI number?

David Tjahjono's National Provider Identifier (NPI) is 1619808201, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is David Tjahjono's specialty?

David Tjahjono is listed in the NPPES registry with a primary specialty of Counselor (Behavioral Health & Social Service Providers).

Where is David Tjahjono located?

David Tjahjono's practice location on file with NPPES is 1450 Southgate Ave Apt 103, Daly City, CA 94015-4019.

What is David Tjahjono's phone number?

The practice phone number listed in the NPPES registry for David Tjahjono is (628) 666-7516.

Is David Tjahjono's NPI active?

Yes — David Tjahjono's NPI (1619808201) is active in the NPPES registry as of the last update on 2026-05-25.

IndividualActive

David Tjahjono

NPI 1619808201 · Counselor · Daly City, CA

David Tjahjono is a Counselor provider in Daly City, CA (NPI 1619808201).

Provider details

NPI number: 1619808201
Entity type: Individual
Primary specialty: CounselorBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: Yes
License: 0-543-497-2 (CA)

Specialties & taxonomies

CounselorPrimary101Y00000XLicense 0-543-497-2 (CA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(52/100 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

1450 Southgate Ave Apt 103

Daly City, CA 94015-4019

Phone: (628) 666-7516

Street-level locationGet directions

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Mailing address