Tahseen Shareef, MD
NPI 1669491809 · Internal Medicine Physician · Loma Linda, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tahseen Shareef, MD is a Internal Medicine Physician provider in Loma Linda, CA (NPI 1669491809).
Provider details
- NPI number
- 1669491809
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- G84109 (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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
128 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 94 | $78 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 34 | $127 |
Typical Medicare-allowed amounts for these services range $78–$127 (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 · 144 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 564 | 167 |
| Losartan Potassium | 531 | 136 |
| Levothyroxine Sodium | 402 | 112 |
| Amlodipine Besylate | 401 | 122 |
| Gabapentin | 383 | 98 |
| Trazodone Hcl | 321 | 75 |
| Hydrocodone/Acetaminophen |
Practice location
Mailing address
Additional practice locations (1)
- 29099 Hospital Rd Ste 107Lake Arrowhead, CA 92352-9779Phone: (909) 203-3766Fax: (909) 337-3499
Registry dates
- Enumerated
- 2006-07-19
- Last updated
- 2025-09-02
- Certified
- 2025-09-02
Frequently asked questions
- What is Tahseen Shareef's NPI number?
- Tahseen Shareef's National Provider Identifier (NPI) is 1669491809, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tahseen Shareef's specialty?
- Tahseen Shareef is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tahseen Shareef located?
- Tahseen Shareef's practice location on file with NPPES is 11374 Mountain View Ave, Loma Linda, CA 92354-3830.
- What is Tahseen Shareef's phone number?
- The practice phone number listed in the NPPES registry for Tahseen Shareef is (909) 203-3825.
- Does Tahseen Shareef accept Medicare?
- Tahseen Shareef is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tahseen Shareef's NPI active?
- Yes — Tahseen Shareef's NPI (1669491809) is active in the NPPES registry as of the last update on 2025-09-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.