Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

PAUL DAVID CHASIN MD
NPI 1649261959
Emergency Medicine in Pleasanton, CA

Active since November 04, 2005PECOS Enrolled
5555 W LAS POSITAS BLVD, PLEASANTON, CA 94588(209) 342-2300(209) 524-4240 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Paul David Chasin Md NPPES

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

PAUL DAVID CHASIN MD (NPI 1649261959) is an individual emergency medicine provider in Pleasanton, California, licensed in California (A26339) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1649261959
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NamePAUL DAVID CHASINCredential: MD
Location Address5555 W LAS POSITAS BLVDPleasanton, CA 94588-4000
Mailing Address4301 Northstar WayModesto, CA 95356-9262 · (209) 342-2300 · Fax (209) 524-4240
Fax(209) 524-4240
Sole ProprietorNo
Enumeration DateNovember 4, 2005
Last NPPES UpdateJuly 13, 2026
NPI 1649261959 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License Licensed in CA · A26339
Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

5555 W LAS POSITAS BLVD, Pleasanton, CA 94588

Other Identifiers 2

Other00A263390CA · Blue Shield
Medicaid00A263390CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

Enrolled in Medicare (PECOS)

Paul David Chasin Md 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94588 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
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
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 20

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

Emergency Medicine
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Emergency Medicine
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Emergency Medicine
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Pediatrics
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Emergency Medicine
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Pharmacist
5555 W LAS POSITAS BLVD, PHARMACY DEPARTMENT
PLEASANTON, CA 94588
Physical Therapist
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Physical Therapist
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1649261959, enumerated as an "individual" on November 04, 2005.

The provider is located at 5555 W LAS POSITAS BLVD PLEASANTON, CA 94588 and the phone number is (209) 342-2300.

Emergency Medicine with taxonomy code 207P00000X.

The provider might be accepting Accepts: Blue Cross Blue Shield, Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.