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MR. MARK MCNAMARA M.D.
NPI 1275640294
Internal Medicine - Hematology & Oncology in Pasadena, CA

Active since August 24, 2006PECOS Enrolled
625 S FAIR OAKS AVE STE 400, PASADENA, CA 91105(626) 568-1622 Get Directions Write a Review

NPPES record last updated: November 27, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Mr. Mark Mcnamara M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. MARK MCNAMARA M.D. (NPI 1275640294) is an individual hematology & oncology provider in Pasadena, California, licensed in California (G62456) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1275640294
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameMR. MARK MCNAMARACredential: M.D.
Location Address625 S FAIR OAKS AVE STE 400Pasadena, CA 91105-2684
Mailing AddressPo Box 31309Los Angeles, CA 90031-1309 · (626) 568-1622
Phone(626) 568-1622
Sole ProprietorNo
Enumeration DateAugust 24, 2006
Last NPPES UpdateNovember 27, 2023
NPPES CertifiedSeptember 29, 2020
✔ NPI 1275640294 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in CA · G62456
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Also ListedInternal MedicineTaxonomy 207R00000X · License G62456 (CA)
Also ListedInternal Medicine · HematologyTaxonomy 207RH0000X · License G62456 (CA)
Also ListedInternal Medicine · Medical OncologyTaxonomy 207RX0202X · License G62456 (CA)
625 S FAIR OAKS AVE STE 400, Pasadena, CA 91105
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mr. Mark Mcnamara M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Mark Mcnamara reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Usc Care Medical Group, Inc
5.8 mi
General Practice
1520 SAN PABLO ST
Los Angeles, CA 90033
  • Reassigned Medicare billing, California enrollment
  • 2,445 clinicians in this Medicare group
NPI 1902846306 (323) 442-5955

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91105 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$187.60 typical visit price
range $62.96 – $187.60
Typical copayment $46.90 (range $15.74 – $46.90)
Most-billed visit code 99205
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 6

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Parenteral nutrition solution, not otherwise specified, 10 grams lipids B4185
Other-Enteral and Parenteral · category OB005N
1 supplier17 claims243 services$11.10 avg. paid by Medicare
Parenteral nutrition solution; compounded amino acid and carbohydrates with electrolytes, trace elements and vitamins, including preparation, any strength, 74 to 100 grams of protein - premix B4197
Other-Enteral and Parenteral · category OB005N
1 supplier17 claims105 services$283.25 avg. paid by Medicare
Parenteral nutrition supply kit; premix, per day B4220
Other-Enteral and Parenteral · category OB005N
1 supplier13 claims81 services$8.11 avg. paid by Medicare
Parenteral nutrition administration kit, per day B4224
Other-Enteral and Parenteral · category OB005N
1 supplier16 claims100 services$25.33 avg. paid by Medicare
Capecitabine, oral, 500 mg J8521
Treatment-Treatment - Miscellaneous · category RX029N
2 suppliers20 claims998 services$0.73 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
2 suppliers13 claims13 services$18.97 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

STEPHEN HUANG M.D.
Internal Medicine (Hematology & Oncology)
625 S FAIR OAKS AVE STE 400
PASADENA, CA 91105
Los Angeles County (626) 568-1622
MS. JACKIE HUANG NP-C
Nurse Practitioner (Adult Health)
625 S FAIR OAKS AVE STE 400
PASADENA, CA 91105
Los Angeles County (626) 568-1622
ALEXIS VICTORIA PARAZO NP
Nurse Practitioner (Adult Health)
625 S FAIR OAKS AVE STE 400
PASADENA, CA 91105
Los Angeles County (626) 535-0794
KAREN HAIBER MD
Internal Medicine (Hematology & Oncology)
625 S FAIR OAKS AVE STE 400
PASADENA, CA 91105
Los Angeles County (626) 568-1622
MARY ISHAK PA-C
Physician Assistant
625 S FAIR OAKS AVE STE 400
PASADENA, CA 91105
Los Angeles County (626) 568-1622
DR. STRATOS CHRISTIANAKIS M.D.
Internal Medicine (Rheumatology)
625 S FAIR OAKS AVE STE 400
PASADENA, CA 91105
Los Angeles County (626) 568-1622

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Mcnamara's NPI number?

The NPI number for Mark Mcnamara is 1275640294. It was assigned to this individual provider in the NPPES registry on August 24, 2006.

Where is Mark Mcnamara located?

Mark Mcnamara practices at 625 S Fair Oaks Ave Ste 400, Pasadena, CA 91105. The listed phone number is (626) 568-1622.

What is Mark Mcnamara's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Mark Mcnamara enrolled in Medicare?

Yes. Mark Mcnamara is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mark Mcnamara's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Mcnamara reassigns Medicare benefits to Usc Care Medical Group, Inc (Los Angeles, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark Mcnamara's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mark Mcnamara was last updated on November 27, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.