Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Marian Isaak, MD

Individual provider Internal Medicine Physician · NPI 1083340004

Dr. Marian Isaak, MD is an Internal Medicine in Holyoke, Massachusetts. Qualified in 2021, 5 years ago. Practices with Western Mass Physician Associates Inc, a 71-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
5
Licensed in
MA
In the registry since
2022
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

575 Beech St
Holyoke, MA 01040-2223
Phone: (413) 534-2500
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 1024101 (MA)

Record details

NPI number1083340004
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 1, 2022
Last updated in NPPESSeptember 26, 2025
Certification dateSeptember 26, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Group practice Western Mass Physician Associates Inc — 71 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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