Peter Zamfirescu Alexander, M.D.
NPI 1548245830 · Pulmonary Disease Physician · Riverside, CA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Zamfirescu Alexander, M.D. is a Pulmonary Disease Physician provider in Riverside, CA (NPI 1548245830).
Provider details
- NPI number
- 1548245830
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G59612 (CA)
Specialties & taxonomies
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
20 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
1,194 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 | 502 | $84 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 271 | $126 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 136 | $140 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 98 | $53 |
| Critical Care, First 30-74 Minutes99291 | 77 | $225 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 125 | 37 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 92 | 17 |
| Montelukast Sodium | 72 | 20 |
| Prednisone | 63 | 49 |
| Omeprazole | 57 | 22 |
| Fluticasone Propionate | 47 | 21 |
| Doxycycline Hyclate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$115 across 5 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
- 2005-12-09
- Last updated
- 2025-02-11
- Certified
- 2025-02-11
Frequently asked questions
- What is Peter Zamfirescu Alexander's NPI number?
- Peter Zamfirescu Alexander's National Provider Identifier (NPI) is 1548245830, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Zamfirescu Alexander's specialty?
- Peter Zamfirescu Alexander is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Zamfirescu Alexander located?
- Peter Zamfirescu Alexander's practice location on file with NPPES is 4234 Riverwalk Parkway Suite 230, Riverside, CA 92505.
- What is Peter Zamfirescu Alexander's phone number?
- The practice phone number listed in the NPPES registry for Peter Zamfirescu Alexander is (951) 781-3672.
- Does Peter Zamfirescu Alexander accept Medicare?
- Peter Zamfirescu Alexander is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Zamfirescu Alexander's NPI active?
- Yes — Peter Zamfirescu Alexander's NPI (1548245830) is active in the NPPES registry as of the last update on 2025-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.