Nataliya Mar, MD
Hematology & Oncology Physician · Orange, CA
Nataliya Mar, MD is a hematology & oncology physician with a practice address in Orange, California, and NPI 1922240191, issued on Apr 2, 2009. Check the license (California A137938, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nataliya Mar
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A137938 CA
Self-reported in NPPES; status is on the state search - Practice location
- 101 The City Drive South, Orange, CA 92868
- Phone
- (714) 456-8000
- Enumerated
- Apr 2, 2009
- Record last updated
- May 8, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150914002416); accepts Medicare assignment
- Medical or professional school
- State University Of Ny Upstate Medical University, 2009
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 101 The City Drive South
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicholas Ambus, MDStudent in an Organized Health Care Education/Training Program1245084649
- Elham AmiriStudent in an Organized Health Care Education/Training Program1497160972
- Kellie Binder, NPPain Management Registered Nurse1114179611
- Robert Bristow, MDGynecologic Oncology Physician1427016039
- Madison CarterStudent in an Organized Health Care Education/Training Program1306692199
- Metha Chea, MDStudent in an Organized Health Care Education/Training Program1164363420
Verify Nataliya Mar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A137938Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,530 Medicare Part D claims for 168 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 66 claims were for opioids.
Most prescribed
- Prednisone119 claims
- Nubeqa85 claims
- Levothyroxine Sodium80 claims
- Eliquis72 claims
- Cabometyx71 claims
- Ondansetron Odt67 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 MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $28,988.14
39 payments; by number, the most common kind was food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 8,560 providers of this specialty with any payment received $7,481.41 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
- UC RegentsOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nataliya Mar among 1,583 hematology & oncology physician records in California
Nataliya Mar, MD is one of 1,583 hematology & oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 66% of them.
- NPI issued2009 · 66% of these records are older, 30% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2009 · median 2003 among the 1,124 with a school on file
- Record last updated2018 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Orange → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Timothy Byun, MDOrange, CA 928681871545012
- Warren Chow, MDOrange, CA 928681093822017
- Paul Coluzzi, M.D.Orange, CA 928681972563906
- Mihaela Cristea, MDOrange, CA 928681417050998
- Sam Huang, M.D.Orange, CA 928681841248812
- Tiberio Lindgren, MDOrange, CA 928681275585424
- John Link, MDOrange, CA 928681245281211
- Steven Lipkin, MDOrange, CA 928681134153547
Common questions
What is Nataliya Mar, MD's NPI number?
Nataliya Mar, MD's National Provider Identifier (NPI) is 1922240191, issued on Apr 2, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Nataliya Mar, MD located?
The NPPES record lists a practice address at 101 The City Drive South, Orange, CA, 92868. Phone: (714) 456-8000. Providers update this record themselves, so call before visiting.
How can I verify Nataliya Mar, MD's license?
NPPES lists California license number A137938, 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 Nataliya Mar, MD prescribe under Medicare Part D?
In 2024, Nataliya Mar, MD had 1,530 Medicare Part D claims for 168 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Nataliya Mar, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100. 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.