Peter L. Zamfirescu Alexander, M.D.
Pulmonary Disease Physician · Riverside, CA
Peter L. Zamfirescu Alexander, M.D. is a pulmonary disease physician with a practice address in Riverside, California, and NPI 1548245830, issued on Dec 9, 2005. Check the license (California G59612, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Peter L. Zamfirescu Alexander
- Credential
- M.D.
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- G59612 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4234 Riverwalk Parkway Suite 230, Riverside, CA 92505
- Phone
- (951) 781-3672
- Enumerated
- Dec 9, 2005
- Record last updated
- Feb 11, 2025
- Fax
- (951) 781-0365
- Medicare enrollment
- Enrolled (PECOS I20140826000475); accepts Medicare assignment
- Medical or professional school
- Hahneman Medical College Of The Pacific, 1984
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 1,443 in California → Look up another NPI →
Also registered at 4234 Riverwalk Parkway Suite 230
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ahmed El Bershawi, M.D.Pulmonary Disease Physician1619946654
- Cedric Franklin Rutland, M.D.Critical Care Medicine (Internal Medicine) Physician1811122799
- Salim Harianawala, M.D.Pulmonary Disease Physician1710183868
- Muhammad Iqbal, M.D.Critical Care Medicine (Internal Medicine) Physician1225287881
- Heba Ismail, M.D.Pulmonary Disease Physician1124296124
- Liliana Mendoza, D.O.Critical Care Medicine (Internal Medicine) Physician1174882450
Verify Peter L. Zamfirescu Alexander in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G59612Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average pulmonary disease physician in 2024
900 Medicare Part D claims for 173 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Albuterol Sulfate Hfa125 claims
- Trelegy Ellipta92 claims
- Montelukast Sodium72 claims
- Prednisone63 claims
- Omeprazole57 claims
- Fluticasone Propionate47 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 73 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $114.91
5 payments; by number, the most common kind was food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc. The 8,806 providers of this specialty with any payment received $5,159.88 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- EL-Bershawi Medical CorpRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peter L. Zamfirescu Alexander among 1,443 pulmonary disease physician records in California
Peter L. Zamfirescu Alexander, M.D. is one of 1,443 pulmonary disease physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1984 · median 2002 among the 1,061 with a school on file
- Record last updated2025 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in California
There are 1,443 pulmonary disease physician records in California.
All 1,443 in California → Every provider in Riverside → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Faraz Afridi, MDRiverside, CA 925051871905257
- Ahmad Alazzeh, MDRiverside, CA 925051194037945
- Vinod Ambastha, MDRiverside, CA 925051467511170
- Long Bach, MDRiverside, CA 925051285701003
- Ahmed El Bershawi, M.D.Riverside, CA 925051619946654
- Zeron Ghazarian, M.D.Riverside, CA 925051063785756
- Salim Harianawala, M.D.Riverside, CA 925051710183868
- Heba Ismail, M.D.Riverside, CA 925051124296124
Common questions
What is Peter L. Zamfirescu Alexander, M.D.'s NPI number?
Peter L. Zamfirescu Alexander, M.D.'s National Provider Identifier (NPI) is 1548245830, issued on Dec 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Peter L. Zamfirescu Alexander, M.D. located?
The NPPES record lists a practice address at 4234 Riverwalk Parkway Suite 230, Riverside, CA, 92505. Phone: (951) 781-3672. Providers update this record themselves, so call before visiting.
How can I verify Peter L. Zamfirescu Alexander, M.D.'s license?
NPPES lists California license number G59612, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Peter L. Zamfirescu Alexander, M.D. prescribe under Medicare Part D?
In 2024, Peter L. Zamfirescu Alexander, M.D. had 900 Medicare Part D claims for 173 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
What is Peter L. Zamfirescu Alexander, M.D.'s MIPS final score?
The 2023 MIPS final score is 73 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.