Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Ruth Blash, MD

Individual provider Internal Medicine Physician · NPI 1295849545

Ruth Blash, MD practises Internal Medicine in Fishkill, New York. Qualified in 1991, 35 years ago. Practices with Optum Medical Care PC, a 1,018-clinician group, works from 3 locations, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
35
Licensed in
NY
In the registry since
2006
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

600 Westage Business Ctr Dr
Fishkill, NY 12524-2281
Phone: (845) 231-5600
Fax: (845) 231-5489
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 375 Windsor Hwy, New Windsor, NY 12553-7902 — (845) 565-1771
  • 375 Windsor Hwy, New Windsor, NY 12553-7902 — (845) 565-1771

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 200863 (NY)

Record details

NPI number1295849545
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 17, 2006
Last updated in NPPESMarch 17, 2018

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1991 (35 years in practice)
Group practice Optum Medical Care Pc — 1018 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients360
Services billed 5,384 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Optum Medical Care PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1018 clinicians in the practice; 12 are shown here.

Other providers in Fishkill