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DR. DENNIS KEITH ALFARO M.D.
NPI 1407847718
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 14, 2014. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Dennis Keith Alfaro M.d. NPPES

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

DR. DENNIS KEITH ALFARO M.D. (NPI 1407847718) is an individual emergency medicine provider in Pleasanton, California, licensed in California (G67215) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1407847718
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. DENNIS KEITH ALFAROCredential: M.D.
Location Address5555 W LAS POSITAS BLVDPleasanton, CA 94588-4000
Mailing Address4301 Northstar WayModesto, CA 95356-9262 · (209) 342-2300 · Fax (209) 524-4240
Phone(209) 342-2300
Fax(209) 524-4240
Sole ProprietorYes
Enumeration DateNovember 4, 2005
Last NPPES UpdateJuly 14, 2014
✔ NPI 1407847718 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 · G67215
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
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Other Identifiers 4

Other00G672150CA · Blue Shield
Medicare ID-Type Unspecified00G672152CA
Medicaid00G672150CA
Medicare UPINE82801

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Dennis Keith Alfaro M.d. 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

2

Medicare enrollment records show Dennis Alfaro reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cep America - California
12 mi
Emergency Medicine
27200 CALAROGA AVE
Hayward, CA 94545
  • Reassigned Medicare billing, California enrollment
  • 2,323 clinicians in this Medicare group
NPI 1194741462 (510) 264-4026
San Francisco Emergency Medical Associates
30 mi
Emergency Medicine
1101 VAN NESS AVE
San Francisco, CA 94109
  • Reassigned Medicare billing, California enrollment
  • 155 clinicians in this Medicare group
NPI 1134110661 (415) 244-2886

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

Areas of Expertise CMS Part B claims 7

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.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
238 services195 patients
Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
188 services176 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
181 services169 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
181 services152 patients
Critical care, each additional 30 minutes 99292
Critical care refers to special attention given to patients facing life-threatening conditions. Each additional 30 minutes indicates the extension of this specialized care. This might include close monitoring, medication adjustments, and immediate interventions as needed.
78 services51 patients
Electrocardiogram (ecg) 1 to 3 leads with review by physician only 93042
An Electrocardiogram (ECG) is a non-invasive test that records the electrical activity of your heart. 1 to 3 leads or sensors are placed on your body to capture this data. A physician then reviews the results to evaluate your heart's health.
53 services51 patients

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.

DESMOND CHEE
Physician Assistant
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Alameda County (925) 416-6585
CYNTHIA SUE PENN-DUECKER MD
Emergency Medicine
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Alameda County (209) 342-2300
SIMON Y LEE M.D.
Pediatrics
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Alameda County (925) 416-3672
RYAN SCOTT CATES PA-C
Physician Assistant
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Alameda County (813) 732-7842
DR. TONY G SHIU MD
Emergency Medicine
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Alameda County (209) 342-2300
CHARISMA KAUSHIK MD
Internal Medicine (Critical Care Medicine)
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Alameda County (925) 416-3418
JODI NAKAWATASE PT
Physical Therapist
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Alameda County (925) 416-3840
EDWARD Y KAN MD
Emergency Medicine
5555 W LAS POSITAS BLVD
PLEASANTON, CA 94588
Alameda County (209) 342-2300

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 Dennis Alfaro's NPI number?

The NPI number for Dennis Alfaro is 1407847718. It was assigned to this individual provider in the NPPES registry on November 4, 2005.

Where is Dennis Alfaro located?

Dennis Alfaro practices at 5555 W Las Positas Blvd, Pleasanton, CA 94588. The listed phone number is (209) 342-2300.

What is Dennis Alfaro's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Dennis Alfaro enrolled in Medicare?

Yes. Dennis Alfaro is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Dennis Alfaro's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Dennis Alfaro reassigns Medicare benefits to 2 organizations: Cep America - California (Hayward, CA) and San Francisco Emergency Medical Associates (San Francisco, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Dennis Alfaro's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Dennis Alfaro was last updated on July 14, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.