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DR. DARWIN C TSANG O.D.
NPI 1619344918
Optometrist in Petaluma, CA

Active since August 21, 2015PECOS EnrolledAccepts Medicare Assignment
401 KENILWORTH DR, INSIDE TARGET OPTICAL, PETALUMA, CA 94952(707) 775-6022(707) 782-0568 Get Directions Write a Review

NPPES record last updated: September 23, 2016. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Darwin C Tsang O.d. NPPES

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

DR. DARWIN C TSANG O.D. (NPI 1619344918) is an individual optometrist in Petaluma, California, licensed in California (15225 TLG) and active in the NPI registry since August 2015. He is enrolled in Medicare PECOS and is a graduate of New England College Of Optometry (2015).

NPPES Registry Identity

NPI1619344918
Entity TypeIndividualMale
Primary Taxonomy152W00000X
Provider Legal NameDR. DARWIN C TSANGCredential: O.D.
Location Address401 KENILWORTH DR, INSIDE TARGET OPTICALPetaluma, CA 94952-3400
Mailing Address707 Kenilworth Drive, Inside Target OpticalPetaluma, CA 94952-3400 · (707) 782-0572 · Fax (707) 782-0568
Phone(707) 775-6022
Fax(707) 782-0568
Sole ProprietorYes
Medical School CMSNew England College Of OptometryGraduated 2015
Enumeration DateAugust 21, 2015
Last NPPES UpdateSeptember 23, 2016
✔ NPI 1619344918 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers
Taxonomy Code152W00000X
License✔ Licensed in CA · 15225 TLG
Definition
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
401 KENILWORTH DR, Petaluma, CA 94952
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Darwin C Tsang O.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9931401429
PECOS Enrollment IDI20151229002601
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.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
92 services91 patients
Photography of the retina 92250
Photography of the retina, also known as retinal imaging, is a non-invasive procedure that captures images of the back of your eye. This helps doctors identify and monitor conditions like glaucoma, macular degeneration, or diabetic retinopathy. It's painless and quick, often part of a routine eye exam.
67 services67 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
54 services54 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
34 services31 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
13 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94952 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
$142.00 typical visit price
range $63.04 – $187.01
Typical copayment $35.50 (range $15.76 – $46.75)
Most-billed visit code 99204
Established Patient
$77.94 typical visit price
range $21.02 – $153.40
Typical copayment $19.48 (range $5.25 – $38.35)
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 8

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

KRISTI ROSE LIM WONG
Pharmacist
401 KENILWORTH DR
PETALUMA, CA 94952
Sonoma County (707) 775-6323
DR. THOMAS RANDALL SZUTZ D.D.S.
Dentist
401 KENILWORTH DR, SUITE 960
PETALUMA, CA 94952
Sonoma County (707) 789-9600
LAUREN ASHLEY LOUIE PHARM. D.
Pharmacist
401 KENILWORTH DR
PETALUMA, CA 94952
Sonoma County (707) 775-6323
LUXOTTICA OF AMERICA INC.
Eyewear Supplier
401 KENILWORTH DR
PETALUMA, CA 94952
Sonoma County (707) 775-6022
DR. NICHOLAS ROBERT LAU
Pharmacist
401 KENILWORTH DR
PETALUMA, CA 94952
Sonoma County (707) 775-6323
HUMARA ANWAR
Pharmacist
401 KENILWORTH DR, T-2601
PETALUMA, CA 94952
Sonoma County (707) 775-6323
GARFIELD BEACH CVS LLC
Pharmacy
401 KENILWORTH DR
PETALUMA, CA 94952
Sonoma County (707) 775-6323
MELISSA ANN STYLES D.D.S
Dentist
401 KENILWORTH DR, SUITE 960
PETALUMA, CA 94952
Sonoma County (707) 789-9600

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Darwin Tsang's NPI number?

The NPI number for Darwin Tsang is 1619344918. It was assigned to this individual provider in the NPPES registry on August 21, 2015.

Where is Darwin Tsang located?

Darwin Tsang practices at 401 Kenilworth Dr Inside Target Optical, Petaluma, CA 94952. The listed phone number is (707) 775-6022.

What is Darwin Tsang's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Is Darwin Tsang enrolled in Medicare?

Yes. Darwin Tsang is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Darwin Tsang accept?

Health plans from Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and Providence Health Plan list Darwin Tsang as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Darwin Tsang was last updated on September 23, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years 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.