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RUPERT ROUPEN HOROUPIAN MD
NPI 1184686156
Surgery in Oakland, CA

Active since April 05, 2006PECOS EnrolledAccepts Medicare Assignment
365 HAWTHORNE AVE, SUITE 101, OAKLAND, CA 94609(510) 465-5523(510) 832-6061 Get Directions Write a Review

NPPES record last updated: February 7, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Feb 7, 2025, Oct 3, 2024 (2 updates tracked since 2024).

About Rupert Roupen Horoupian Md NPPES

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

RUPERT ROUPEN HOROUPIAN MD (NPI 1184686156) is an individual surgery provider in Oakland, California, licensed in California (G84866) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of University Of Maryland School Of Medicine (1993).

NPPES Registry Identity

NPI1184686156
Entity TypeIndividualMale
Primary Taxonomy208600000X
Provider Legal NameRUPERT ROUPEN HOROUPIANCredential: MD
Location Address365 HAWTHORNE AVE, SUITE 101Oakland, CA 94609-3107
Mailing Address27206 Calaroga Ave Ste 206Hayward, CA 94545-4300 · (510) 732-5731 · Fax (510) 732-5739
Phone(510) 465-5523
Fax(510) 832-6061
Sole ProprietorNo
Medical School CMSUniversity Of Maryland School Of MedicineGraduated 1993
Enumeration DateApril 5, 2006
Last NPPES UpdateFebruary 7, 20252 updates tracked since enumeration
NPPES CertifiedFebruary 7, 2025
✔ NPI 1184686156 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in CA · G84866
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
365 HAWTHORNE AVE, Oakland, CA 94609
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Secondary Practice Locations 2

Location 127206 Calaroga Ave Ste 206Hayward, CA 94545-4300 · Phone (510) 732-5731 · Fax (510) 732-5739
Location 23010 Colby St Ste 118Berkeley, CA 94705-2059 · Phone (510) 486-0818 · Fax (510) 486-0819

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

Rupert Roupen Horoupian Md 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 ID6103880844
PECOS Enrollment IDI20041112000962
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 Rupert Horoupian reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sutter Bay Medical Foundation
6.0 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 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.

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.
90 services90 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.
89 services72 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.
83 services62 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
44 services44 patients
Repair of groin hernia using an endoscope 49650
This procedure involves the use of an endoscope, a thin tube with a camera, to repair a hernia in the groin area. The surgeon makes small incisions, inserts the endoscope, and uses special tools to fix the hernia. This minimally invasive technique often results in quicker recovery times.
24 services24 patients
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221
Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.
24 services23 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94609 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
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
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.

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.

Reported Quality Measures

Breast Cancer Screening
Percentage of women 50-74 years of age who had a mammogram to screen for breast cancer
3%239 patients1/55-star benchmark: 92%
Cervical Cancer Screening
Percentage of women 21-64 years of age who were screened for cervical cancer using either of the following criteria: - Women age 21-64 who had cervical cytology performed every 3 years - Women age 30-64 who had cervical cytology/human papillomavirus (HPV)…
2%324 patients
Closing the Referral Loop: Receipt of Specialist Report
Percentage of patients with referrals, regardless of age, for which the referring provider receives a report from the provider to whom the patient was referred
3%79 patients1/55-star benchmark: 95%
Colorectal Cancer Screening
Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer
11%495 patients1/55-star benchmark: 85%
Diabetes: Medical Attention for Nephropathy
The percentage of patients 18-75 years of age with diabetes who had a nephropathy screening test or evidence of nephropathy during the measurement period
77%39 patients4/55-star benchmark: 99%
Documentation of Current Medications in the Medical Record
Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.
79%1,821 patients2/55-star benchmark: 100%
Falls: Screening for Future Fall Risk
Percentage of patients 65 years of age and older who were screened for future fall risk during the measurement period
1%336 patients1/55-star benchmark: 99%
Health Information Exchange
The MIPS eligible clinician that transitions or refers their patient to another setting of care or health care clinician (1) uses CEHRT to create a summary of care record; and (2) electronically transmits such summary to a receiving health care clinician for…
54%81 patients3/55-star benchmark: 88%
Medication Reconciliation
The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.
85%1,165 patients2/55-star benchmark: 100%
Patient-Specific Education
The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.
26%736 patients2/55-star benchmark: 97%
Pneumococcal Vaccination Status for Older Adults
Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine
4%336 patients1/55-star benchmark: 90%
Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
33%992 patients2/55-star benchmark: 97%
Preventive Care and Screening: Influenza Immunization
Percentage of patients aged 6 months and older seen for a visit between October 1 and March 31 who received an influenza immunization OR who reported previous receipt of an influenza immunization
2%382 patients1/55-star benchmark: 88%
Preventive Care and Screening: Screening for Depression and Follow-Up Plan
Percentage of patients aged 12 years and older screened for depression on the date of the encounter using an age appropriate standardized depression screening tool AND if positive, a follow-up plan is documented on the date of the positive screen
1%950 patients1/55-star benchmark: 96%
Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention
Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user
Patients tobacco: 55% · 187 patients
64%187 patients
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
29%736 patients2/55-star benchmark: 100%
Secure Messaging
For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…
2%736 patients1/55-star benchmark: 89%
Use of High-Risk Medications in the Elderly
Percentage of patients 65 years of age and older who were ordered high-risk medications. Two rates are submitted. 1) Percentage of patients who were ordered at least one high-risk medication.
Lower rates are better for this measure.
Patients 2+: 0% · 336 patients
0%336 patients5/55-star benchmark: 100%
View, Download, or Transmit (VDT)
At least one patient seen by the MIPS eligible clinician during the performance period (or patient-authorized representative) views, downloads or transmits their health information to a third party during the performance period.
4%736 patients
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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.

MR. HON FONG MD
Obstetrics & Gynecology (Gynecology)
365 HAWTHORNE AVE, SUITE 301
OAKLAND, CA 94609
Alameda County (510) 893-1700
ERIC L JOHNSON MD
Internal Medicine (Interventional Cardiology)
365 HAWTHORNE AVE, #201
OAKLAND, CA 94609
Alameda County (510) 452-1345
AARON PETERS PA-C
Physician Assistant (Surgical)
365 HAWTHORNE AVE
OAKLAND, CA 94609
Alameda County (510) 465-5523
AJAY KUMAR UPADHYAY MD
Surgery
365 HAWTHORNE AVE, STE 101
OAKLAND, CA 94609
Alameda County (510) 465-5523
MR. THOMAS LEE HAMBRICK MD
Obstetrics & Gynecology
365 HAWTHORNE AVE, SUITE 301
OAKLAND, CA 94609
Alameda County (510) 893-1700
MR. EDWARD MARTIN BLUMENSTOCK MD
Obstetrics & Gynecology
365 HAWTHORNE AVE, STE 301
OAKLAND, CA 94609
Alameda County (510) 893-1700
MS. GOLDEE HANNAH GROSS MD
Obstetrics & Gynecology
365 HAWTHORNE AVE, STE 301
OAKLAND, CA 94609
Alameda County (510) 893-1700
MR. WILLIAM MORRIS ISENBERG MD
Obstetrics & Gynecology
365 HAWTHORNE AVE, SUITE 301
OAKLAND, CA 94609
Alameda County (510) 893-1700

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 Rupert Horoupian's NPI number?

The NPI number for Rupert Horoupian is 1184686156. It was assigned to this individual provider in the NPPES registry on April 5, 2006.

Where is Rupert Horoupian located?

Rupert Horoupian practices at 365 Hawthorne Ave Suite 101, Oakland, CA 94609. The listed phone number is (510) 465-5523.

What is Rupert Horoupian's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Rupert Horoupian enrolled in Medicare?

Yes. Rupert Horoupian 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 Rupert Horoupian's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Rupert Horoupian 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 Rupert Horoupian'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 Rupert Horoupian was last updated on February 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 months 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.