Muhammad Zain, M.D.
NPI 1689107252 · Student in an Organized Health Care Education/Training Program · Riverside, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Muhammad Zain, M.D. is a Student in an Organized Health Care Education/Training Program provider in Riverside, CA (NPI 1689107252).
Provider details
- NPI number
- 1689107252
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
26 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 26 | $80 |
Typical Medicare-allowed amounts for these services range $80–$80 (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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefpodoxime Proxetil | 39 | 39 |
| Doxycycline Monohydrate | 28 | 28 |
| Pantoprazole Sodium | 28 | 25 |
| Prednisone | 26 | 24 |
| Oxycodone Hcl | 18 | 18 |
| Atorvastatin Calcium | 17 | — |
| Furosemide | 17 | 16 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-04-10
- Last updated
- 2021-12-17
Frequently asked questions
- What is Muhammad Zain's NPI number?
- Muhammad Zain's National Provider Identifier (NPI) is 1689107252, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Muhammad Zain's specialty?
- Muhammad Zain is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Muhammad Zain located?
- Muhammad Zain's practice location on file with NPPES is 4445 Magnolia Ave, Riverside, CA 92501-4135.
- What is Muhammad Zain's phone number?
- The practice phone number listed in the NPPES registry for Muhammad Zain is (951) 788-3000.
- Does Muhammad Zain accept Medicare?
- Muhammad Zain is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Muhammad Zain's NPI active?
- Yes — Muhammad Zain's NPI (1689107252) is active in the NPPES registry as of the last update on 2021-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.