Igor Mashchenko, MD
Emergency Medicine Physician · Pasadena, CA
Igor Mashchenko, MD is an emergency medicine physician with a practice address in Pasadena, California, and NPI 1699270884, issued on Mar 28, 2018. Check the license (California A184456, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Igor Mashchenko
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A184456 CA
Self-reported in NPPES; status is on the state search - Practice location
- 100 W California Blvd, Pasadena, CA 91105
- Phone
- (855) 522-7898
- Enumerated
- Mar 28, 2018
- Record last updated
- Aug 28, 2025
- Medicare enrollment
- Enrolled (PECOS I20230718000975); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 100 W California Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Devan Abhari, MDStudent in an Organized Health Care Education/Training Program1922849041
- Lina Acopians, DOHospitalist Physician1548821523
- Daniel Adran, MDNeuroradiology Physician1518456441
- Alipasha Adrangui, M.D.Hospitalist Physician1780911263
- Vahe Aghajanyan, M.D.Student in an Organized Health Care Education/Training Program1447047238
- Ignacio Aguilar, RNFARegistered Nurse First Assistant1497583603
Verify Igor Mashchenko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A184456Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average emergency medicine physician in 2024
130 Medicare Part D claims for 108 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin24 claims
- Amoxicillin-Clavulanate Potass13 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.
Bills Medicare through 2 group practices
- Hmh Emergency Medical Group, Inc.Pasadena, CA
- Team Physicians OF Northern California Medical Group IncWest Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Igor Mashchenko among 7,751 emergency medicine physician records in California
Igor Mashchenko, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 81% of them.
- NPI issued2018 · 81% of these records are older, 15% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2018 · median 2011 among the 4,560 with a school on file
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Pasadena → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Betty Ahn, MDPasadena, CA 911051902862089
- Roy Antelyes, M.D.Pasadena, CA 911051275648610
- Timothy Ballard, M.D.Pasadena, CA 911051710090816
- Bradley Gerberich, M.D.Pasadena, CA 911051790728277
- William Gregory, MDPasadena, CA 911051659337350
- Stanley Kalter, MDPasadena, CA 911051518071125
- Taline Kilaghbian, M.D.Pasadena, CA 911051699889212
- Mai Lai, MDPasadena, CA 911051841232717
Common questions
What is Igor Mashchenko, MD's NPI number?
Igor Mashchenko, MD's National Provider Identifier (NPI) is 1699270884, issued on Mar 28, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Igor Mashchenko, MD located?
The NPPES record lists a practice address at 100 W California Blvd, Pasadena, CA, 91105. Phone: (855) 522-7898. Providers update this record themselves, so call before visiting.
How can I verify Igor Mashchenko, MD's license?
NPPES lists California license number A184456, 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 Igor Mashchenko, MD prescribe under Medicare Part D?
In 2024, Igor Mashchenko, MD had 130 Medicare Part D claims for 108 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.