Hassan Chahine, MD
NPI 1518326933 · Internal Medicine Physician · Downey, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hassan Chahine, MD is a Internal Medicine Physician provider in Downey, CA (NPI 1518326933).
Provider details
- NPI number
- 1518326933
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A151005 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,809 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 1,909 | $81 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 341 | $122 |
| Critical Care, First 30-74 Minutes99291 | 181 | $216 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 153 | $84 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 76 | $134 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 95 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 185 | 50 |
| Apixabanbrand: Eliquis | 160 | 29 |
| Pantoprazole Sodium | 125 | 34 |
| Levothyroxine Sodium | 124 | 28 |
| Gabapentin | 112 | 21 |
| Chlorhexidine Gluconate | 110 | 18 |
| Amlodipine Besylate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$21 across 2 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
Registry dates
- Enumerated
- 2016-02-12
- Last updated
- 2024-02-26
- Certified
- 2024-02-26
Frequently asked questions
- What is Hassan Chahine's NPI number?
- Hassan Chahine's National Provider Identifier (NPI) is 1518326933, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hassan Chahine's specialty?
- Hassan Chahine is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Hassan Chahine located?
- Hassan Chahine's practice location on file with NPPES is 8301 Florence Ave Ste 301, Downey, CA 90240-3948.
- What is Hassan Chahine's phone number?
- The practice phone number listed in the NPPES registry for Hassan Chahine is (866) 333-3158.
- Does Hassan Chahine accept Medicare?
- Hassan Chahine is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hassan Chahine's NPI active?
- Yes — Hassan Chahine's NPI (1518326933) is active in the NPPES registry as of the last update on 2024-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.