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ASSAD HASSOUN M.D.
NPI 1982625349
Transplant Surgery in San Francisco, CA

Active since July 21, 2006PECOS EnrolledAccepts Medicare Assignment
2340 CLAY ST, 4TH FLOOR, SAN FRANCISCO, CA 94115(415) 600-1010 Get Directions Write a Review

NPPES record last updated: October 26, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Assad Hassoun M.d. NPPES

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

ASSAD HASSOUN M.D. (NPI 1982625349) is an individual transplant surgery provider in San Francisco, California, licensed in California (A67695) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1986).

NPPES Registry Identity

NPI1982625349
Entity TypeIndividualMale
Primary Taxonomy204F00000X
Provider Legal NameASSAD HASSOUNCredential: M.D.
Location Address2340 CLAY ST, 4TH FLOORSan Francisco, CA 94115-1932
Mailing AddressPo Box 254947Sacramento, CA 95865-4947 · (916) 854-6975 · Fax (916) 854-6844
Phone(415) 600-1010
Sole ProprietorNo
Medical School CMSOtherGraduated 1986
Enumeration DateJuly 21, 2006
Last NPPES UpdateOctober 26, 2011
✔ NPI 1982625349 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyTransplant SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code204F00000X
License✔ Licensed in CA · A67695
Definition
A surgeon who specializes in transplant surgery. Source: National Uniform Claim Committee
2340 CLAY ST, San Francisco, CA 94115
Open in Google Maps ↗

Other Identifiers 2

Medicare ID-Type Unspecified00A676952CA
Medicare UPING74286CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Assad Hassoun M.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 ID2961569926
PECOS Enrollment IDI20090319000283
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 Reassignment

Medicare enrollment records show Assad Hassoun reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sutter Bay Medical Foundation
15 mi
Multi-Specialty
12 CAMINO ENCINAS
Orinda, CA 94563
  • Reassigned Medicare billing, California enrollment
  • 4,479 clinicians in this Medicare group
NPI 1366898538 (510) 204-8180

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 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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
195 services49 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.
91 services24 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
27 services27 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
16 services14 patients
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.
15 services11 patients

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.

JOHN T TSUKAHARA M.D.
Pediatrics
2340 CLAY ST, 3RD FLOOR
SAN FRANCISCO, CA 94115
San Francisco County (415) 600-1111
GUY LUBLINER M.D.
Hospitalist
2340 CLAY ST, 2ND FLOOR
SAN FRANCISCO, CA 94115
San Francisco County (415) 600-3458
CALIFORNIA PACIFIC MEDICAL CENTER
General Acute Care Hospital
2340 CLAY ST, 5TH FLOOR
SAN FRANCISCO, CA 94115
San Francisco County (917) 553-7684
LYNN SIEVERS N.P.
Nurse Practitioner (Family)
2340 CLAY ST, SUITE 537
SAN FRANCISCO, CA 94115
San Francisco County (415) 600-1099
DR. JEREMY ELIJAH BORNSTEIN PH.D.
Clinical Neuropsychologist
2340 CLAY ST, 7TH FLOOR
SAN FRANCISCO, CA 94115
San Francisco County (415) 449-6440
MARIA FERNANDEZ M.D.
Psychiatry & Neurology (Psychiatry)
2340 CLAY ST
SAN FRANCISCO, CA 94115
San Francisco County (415) 600-3510
SUTTER WEST BAY HOSPITALS
General Acute Care Hospital
2340 CLAY ST, 5TH FLOOR, OPHTHALMOLOGY DEPARTMENT
SAN FRANCISCO, CA 94115
San Francisco County (415) 600-3901
SUTTER WEST BAY MEDICAL FOUNDATION
Family Medicine
2340 CLAY ST, FLOORS 1-5 AND 7
SAN FRANCISCO, CA 94115
San Francisco County (415) 600-1000

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 Assad Hassoun's NPI number?

The NPI number for Assad Hassoun is 1982625349. It was assigned to this individual provider in the NPPES registry on July 21, 2006.

Where is Assad Hassoun located?

Assad Hassoun practices at 2340 Clay St 4th Floor, San Francisco, CA 94115. The listed phone number is (415) 600-1010.

What is Assad Hassoun's specialty?

The primary specialty registered for this NPI is Transplant Surgery with taxonomy code 204F00000X.

Is Assad Hassoun enrolled in Medicare?

Yes. Assad Hassoun 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.

Which organization bills Medicare for Assad Hassoun's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Assad Hassoun reassigns Medicare benefits to Sutter Bay Medical Foundation (Orinda, CA). The 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 Assad Hassoun'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 Assad Hassoun was last updated on October 26, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.