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

Sherman Mark Klein, MD

Individual provider Internal Medicine Physician · NPI 1558340992

Sherman Mark Klein, MD practises Internal Medicine in Flushing, New York. Qualified in 1982, 44 years ago. Practices with Tjh Medical Services PC, a 213-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
44
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

14601 45th Ave Ste 303
Flushing, NY 11355-2200 Not confirmed with CMS for 17 years — call before visiting
Phone: (718) 353-1010
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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 162551 (NY)

Record details

NPI number1558340992
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 13, 2006
Last updated in NPPESNovember 26, 2008

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1982 (44 years in practice)
Group practice Tjh Medical Services Pc — 213 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 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 patients61
Services billed 324 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.

Colleagues at Tjh Medical Services PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 213 clinicians in the practice; 12 are shown here.

Other providers in Flushing