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

Dr. Mark C Poznansky, MDPHD

Individual provider Internal Medicine Physician · NPI 1265509889

Dr. Mark C Poznansky, MDPHD is registered under Infectious Disease in Boston, Massachusetts. Qualified in 1985, 41 years ago. Practices with The General Hospital Corporation, a 1,276-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
41
Licensed in
MA
In the registry since
2006
Specialties on file
2
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Practice location Partly verified

Some contact details are missing from the federal record.

Infectious Disease Associates 55 Fruit Street Cox 5
Boston, MA 02114-2696 Not confirmed with CMS for 18 years — call before visiting
Phone: (617) 726-3906
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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 157686 (MA)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 157686 (MA)

Record details

NPI number1265509889
Entity typeIndividual (Type 1)
GenderMale
Credentials MDPHD
Sole proprietorNo
NPI enumeratedNovember 29, 2006
Last updated in NPPESOctober 29, 2007

Medicare enrollment

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

Medicare specialtyINFECTIOUS DISEASE
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1985 (41 years in practice)
Group practice The General Hospital Corporation — 1276 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients45
Services billed 126 a service is one billed item, such as a visit, a test or a procedure
Average patient age67

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.

Colleagues at The General Hospital Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1276 clinicians in the practice; 12 are shown here.

Other providers in Boston