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

Mark A Singer, DO

Individual provider Internal Medicine Physician · NPI 1477569416

Mark A Singer, DO practises Internal Medicine in Huntington, New York. Graduated from New York College of Osteo Medicine of New York Institute of Technology in 1995, 31 years ago. Practices with North Shore Medical Group of the Mount Sinai School of Medicine, a 323-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
31
Trained at
New York College of Osteo Medicine of New York Institute of Technology
Licensed in
NY
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

325 Park Ave
Huntington, NY 11743-2779 Not confirmed with CMS for 18 years — call before visiting
Phone: (631) 351-8487
Fax: (631) 351-3729
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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 207815-1 (NY)

Record details

NPI number1477569416
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 31, 2006
Last updated in NPPESJuly 9, 2008

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolNEW YORK COLLEGE OF OSTEO MEDICINE OF NEW YORK INSTITUTE OF TECHNOLOGY
Graduated 1995 (31 years in practice)
Group practice North Shore Medical Group Of The Mount Sinai School Of Medicine — 323 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients1,054
Services billed 10,541 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

  • Constellation Home Care Home health agency · Syosset, NY · listed as Constellation Home Care LLC
  • Catholic Home Care Home health agency · Farmingdale, NY
  • Peconic Bay Homehealth Services Home health agency · Riverhead, NY
  • Vns & Hospice Of Suffolk Inc Chha Home health agency · Northport, NY

Colleagues at North Shore Medical Group of the Mount Sinai School of Medicine

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 323 clinicians in the practice; 12 are shown here.

Other providers in Huntington