Bassam Nassir, M.D.
NPI 1386848166 · Internal Medicine Physician · El Cajon, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Bassam Nassir, M.D. is a Internal Medicine Physician provider in El Cajon, CA (NPI 1386848166).
Provider details
- NPI number
- 1386848166
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A101888 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
243 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 229 | $9 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 14 | $3 |
Typical Medicare-allowed amounts for these services range $3–$9 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 93 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 591 | 69 |
| Simvastatin | 543 | 61 |
| Amlodipine Besylate | 487 | 53 |
| Atorvastatin Calcium | 446 | 61 |
| Metformin Hcl | 377 | 48 |
| Omeprazole | 345 | 46 |
| Losartan Potassium | 285 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-06-13
- Last updated
- 2018-12-27
Frequently asked questions
- What is Bassam Nassir's NPI number?
- Bassam Nassir's National Provider Identifier (NPI) is 1386848166, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Bassam Nassir's specialty?
- Bassam Nassir is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Bassam Nassir located?
- Bassam Nassir's practice location on file with NPPES is 436 S Magnolia Ave Ste 201, El Cajon, CA 92020-5237.
- What is Bassam Nassir's phone number?
- The practice phone number listed in the NPPES registry for Bassam Nassir is (619) 662-4100.
- Does Bassam Nassir accept Medicare?
- Bassam Nassir is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Bassam Nassir's NPI active?
- Yes — Bassam Nassir's NPI (1386848166) is active in the NPPES registry as of the last update on 2018-12-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.