Mark McNamara, M.D.
Hematology & Oncology Physician · Pasadena, CA
Mark McNamara, M.D. is a hematology & oncology physician with a practice address in Pasadena, California, and NPI 1275640294, issued on Aug 24, 2006. Check the license (California G62456, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark McNamara
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- G62456 CA
Self-reported in NPPES; status is on the state search - Practice location
- 625 S Fair Oaks Ave Ste 400, Pasadena, CA 91105
- Phone
- (626) 568-1622
- Enumerated
- Aug 24, 2006
- Record last updated
- Nov 27, 2023
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 625 S Fair Oaks Ave Ste 400
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stratos Christianakis, M.D.Rheumatology Physician1831114008
- Karen Haiber, MDHematology & Oncology Physician1720519127
- Jackie Huang, NP-CAdult Health Nurse Practitioner1346600681
- Stephen Huang, M.D.Hematology & Oncology Physician1124089685
- Mary Ishak, PA-CPhysician Assistant1750014189
- Alexis Parazo, NPAdult Health Nurse Practitioner1629734777
Verify Mark McNamara in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G62456Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
15 Medicare Part D claims, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D.
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.
Industry payments in 2024: $18.09
1 payment: education; 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.
Mark McNamara among 1,583 hematology & oncology physician records in California
Mark McNamara, M.D. 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 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 71% of these records are
- Record last updated2023 · 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 Pasadena → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Steven Applebaum, MDPasadena, CA 911051295760221
- Weber Chen, M.D.Pasadena, CA 911051679504393
- Karen Haiber, MDPasadena, CA 911051720519127
- Stephen Huang, M.D.Pasadena, CA 911051124089685
- Cynthia Martel, M.D.Pasadena, CA 911051487665865
- William Mcintyre, Jr., M.D.Pasadena, CA 911051710925144
- Tiffany Shaw, MDPasadena, CA 911051407199722
- Ronald Tang, DOPasadena, CA 911051609022383
Common questions
What is Mark McNamara, M.D.'s NPI number?
Mark McNamara, M.D.'s National Provider Identifier (NPI) is 1275640294, issued on Aug 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark McNamara, M.D. located?
The NPPES record lists a practice address at 625 S Fair Oaks Ave Ste 400, Pasadena, CA, 91105. Phone: (626) 568-1622. Providers update this record themselves, so call before visiting.
How can I verify Mark McNamara, M.D.'s license?
NPPES lists California license number G62456, 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 Mark McNamara, M.D. prescribe under Medicare Part D?
In 2024, Mark McNamara, M.D. had 15 Medicare Part D claims; the average among hematology & oncology physician prescribers was 877. 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.