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DR. JOSEPH BAROUK MARZOUK M.D.
NPI 1174636393
Internal Medicine - Infectious Disease in Oakland, CA

Active since August 15, 2006PECOS EnrolledAccepts Medicare Assignment
91.04/100
CMS Quality Rating
4096 PIEDMONT AVE, SUITE 911, OAKLAND, CA 94611(510) 874-1415 Get Directions Write a Review

NPPES record last updated: September 22, 2015. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Joseph Barouk Marzouk M.d. NPPES

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

DR. JOSEPH BAROUK MARZOUK M.D. (NPI 1174636393) is an individual infectious disease provider in Oakland, California, licensed in California (G41722) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Boston University School Of Medicine (1976).

NPPES Registry Identity

NPI1174636393
Entity TypeIndividualMale
Primary Taxonomy207RI0200X
Provider Legal NameDR. JOSEPH BAROUK MARZOUKCredential: M.D.
Location Address4096 PIEDMONT AVE, SUITE 911Oakland, CA 94611-5221
Mailing Address4096 Piedmont Ave, Suite 911Oakland, CA 94611-5221 · (510) 874-1415
Phone(510) 874-1415
Sole ProprietorYes
Medical School CMSBoston University School Of MedicineGraduated 1976
Enumeration DateAugust 15, 2006
Last NPPES UpdateSeptember 22, 2015
✔ NPI 1174636393 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in CA · G41722
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
4096 PIEDMONT AVE, Oakland, CA 94611
Open in Google Maps ↗

Other Identifiers 2

Medicare ID-Type Unspecified00G417220CA
Medicare UPINA48670CA

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

Dr. Joseph Barouk Marzouk 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 ID9133256498
PECOS Enrollment IDI20100420000074
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 Joseph Marzouk reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Alameda Health System
2.3 mi
Surgery
1411 E 31ST STREET
Oakland, CA 94602
  • Reassigned Medicare billing, California enrollment
  • 900 clinicians in this Medicare group
NPI 1740332931 (510) 437-4800

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 2

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.
42 services25 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.
12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94611 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

91.04/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality82.13
Promoting Interoperability100
Improvement Activities40
Cost64.1

Other Providers at the Same Location NPPES 5

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

DR. MARK LEE M.D.
Internal Medicine (Infectious Disease)
4096 PIEDMONT AVE, STE 414
OAKLAND, CA 94611
Alameda County (510) 874-1415
LISA CARLE OTR/L
Occupational Therapist
4096 PIEDMONT AVE, #221
OAKLAND, CA 94611
Alameda County (415) 529-8284
ANNE STANLEY RBT INTERN
Behavior Technician
4096 PIEDMONT AVE, #161
OAKLAND, CA 94611
Alameda County (866) 273-2451
MARCELLA SPENCE MS
Student in an Organized Health Care Education/Training Program
4096 PIEDMONT AVE, #230
OAKLAND, CA 94611
Alameda County (510) 717-3939
MS. CARI LEE DONOVAN LCSW
Social Worker (Clinical)
4096 PIEDMONT AVE
OAKLAND, CA 94611
Alameda County (510) 473-7101

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 Joseph Marzouk's NPI number?

The NPI number for Joseph Marzouk is 1174636393. It was assigned to this individual provider in the NPPES registry on August 15, 2006.

Where is Joseph Marzouk located?

Joseph Marzouk practices at 4096 Piedmont Ave Suite 911, Oakland, CA 94611. The listed phone number is (510) 874-1415.

What is Joseph Marzouk's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Joseph Marzouk enrolled in Medicare?

Yes. Joseph Marzouk 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 Joseph Marzouk's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joseph Marzouk reassigns Medicare benefits to Alameda Health System (Oakland, 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 Joseph Marzouk'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 Joseph Marzouk was last updated on September 22, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.