Mazen Hashisho, M.D.
NPI 1255524427 · Vascular Surgery Physician · Garden Grove, CA
Enrolled with Medicare as Practitioner - Vascular Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mazen Hashisho, M.D. is a Vascular Surgery Physician provider in Garden Grove, CA (NPI 1255524427).
Provider details
- NPI number
- 1255524427
- Entity type
- Individual
- Primary specialty
- Vascular Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A94329 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
3,033 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 638 | $136 |
| Use of a Drug to Induce Depression of Consciousness By Physician Performing a Procedure, Each Additional 15 Minutes99153 | 480 | $13 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 167 | $175 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 163 | $17 |
| Ultrasonic Guidance for Blood Vessel Access76937 | 162 | $43 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clopidogrel Bisulfatebrand: Clopidogrel | 42 | 30 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 20 | 15 |
| Methylprednisolone | 15 | 14 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$31,460 across 35 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 2888 Long Beach Blvd Ste 235Long Beach, CA 90806-1562Phone: (562) 424-4447Fax: (562) 216-1785
- 101 E Beverly Blvd Ste 303Montebello, CA 90640-4316Phone: (562) 506-0176Fax: (562) 506-0053
- 333 Cottman AvePhiladelphia, PA 19111-2434Phone: (215) 214-1427Fax: (215) 214-3901
Registry dates
- Enumerated
- 2007-08-21
- Last updated
- 2020-06-16
- Certified
- 2020-06-16
Frequently asked questions
- What is Mazen Hashisho's NPI number?
- Mazen Hashisho's National Provider Identifier (NPI) is 1255524427, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mazen Hashisho's specialty?
- Mazen Hashisho is listed in the NPPES registry with a primary specialty of Vascular Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Mazen Hashisho located?
- Mazen Hashisho's practice location on file with NPPES is 12555 Garden Grove Blvd Ste 403, Garden Grove, CA 92843-1903.
- What is Mazen Hashisho's phone number?
- The practice phone number listed in the NPPES registry for Mazen Hashisho is (562) 506-0176.
- Does Mazen Hashisho accept Medicare?
- Mazen Hashisho is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mazen Hashisho's NPI active?
- Yes — Mazen Hashisho's NPI (1255524427) is active in the NPPES registry as of the last update on 2020-06-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.