LAKSHAN NICHOLAS FONSEKA DO
NPI 1669113353
Psychiatry & Neurology - Psychiatry in San Francisco, CA

Q: What is Lakshan Fonseka's NPI number?

The NPI number for Lakshan Fonseka is 1669113353. It was assigned to this individual provider in the NPPES registry on April 5, 2022.

Q: What is Lakshan Fonseka's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Q: When was this NPI record last updated?

The NPPES record for Lakshan Fonseka was last updated on June 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since April 05, 2022PECOS Enrolled

675 18TH ST # PB-5250, SAN FRANCISCO, CA 94143(415) 476-7000 Get Directions Write a Review

NPPES record last updated: June 26, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

On this page

About Lakshan Nicholas Fonseka Do NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

LAKSHAN NICHOLAS FONSEKA DO (NPI 1669113353) is an individual psychiatry provider in San Francisco, California, licensed in California (20A25632) and active in the NPI registry since April 2022. He is enrolled in Medicare PECOS and maintains a secondary practice location in Brockton.

NPPES Registry Identity

NPI1669113353

Entity TypeIndividualMale

Primary Taxonomy2084P0800X

Provider Legal NameLAKSHAN NICHOLAS FONSEKACredential: DO

Location Address675 18TH ST # PB-5250San Francisco, CA 94143-4200

Mailing Address28333 Bryce DrCastaic, CA 91384-3781 · (661) 319-6743

Phone(415) 476-7000

Sole ProprietorNo

Enumeration DateApril 5, 2022

Last NPPES UpdateJune 26, 2026

NPPES CertifiedJune 26, 2026

✔ NPI 1669113353 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

License✔ Licensed in CA · 20A25632

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

675 18TH ST # PB-5250, San Francisco, CA 94143

Open in Google Maps ↗

Secondary Practice Location 1

Location 1940 Belmont StBrockton, MA 02301-5568 · Phone (508) 583-4500

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Lakshan Nicholas Fonseka Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Lakshan Fonseka reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

University Of California San Francisco

2.3 mi

Surgery

400 PARNASSUS AVE, MCB 300
San Francisco, CA 94143

Reassigned Medicare billing, California enrollment
5,645 clinicians in this Medicare group

NPI 1346329380 (415) 353-2161

Ucsf Medical Group Business Services

2.3 mi

Internal Medicine

400 PARNASSUS AVE
San Francisco, CA 94122

Reassigned Medicare billing, California enrollment
5,544 clinicians in this Medicare group

NPI 1477624104 (415) 353-2808

The Commonwealth Of Massachusetts

2,697 mi

Mental Health (Including Community Mental Health Center)

75 FENWOOD RD
Boston, MA 02115

Reassigned Medicare billing, Massachusetts enrollment
Also billed through NPI 1740359611 (Massachusetts)
42 clinicians in this Medicare group

NPI 1073638805 (617) 626-9300

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94143 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$202.35 typical visit price

range $69.00 – $202.35

Typical copayment $50.58 (range $17.25 – $50.58)

Most-billed visit code 99205

Established Patient

$84.91 typical visit price

range $23.44 – $166.46

Typical copayment $21.22 (range $5.86 – $41.61)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 9

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MEGAN RAMAIYA MSC

Psychiatry & Neurology (Psychiatry)