Physician Profile

Melissa W. Sum, MD

Unclaimed Profile

About Dr. Sum

Melissa W. Sum, MD practices endocrinology, diabetes & metabolism in New York, NY. Melissa is a 2010 graduate of Columbia University College of Physicians and Surgeons. Medicare claims data shows Melissa provided 1,042 services to 778 patients. The services billed most often include visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient', established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and insertion of needle into vein for collection of blood sample.

Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.

Specialty

Endocrinology, Diabetes & Metabolism (Primary)

Credentials & Licensing

NY license274990
NPI1326369703
NPI issued06/19/2010

License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.

Medicare information

Accepts Medicare assignmentSometimes (reported per claim)
Telehealth reported to CMSYes
Medicare opt-outYes, since February 2026
Can order and refer in MedicareYes

Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.

Common questions

What does Dr. Sum specialize in?

Dr. Sum is an endocrinologist in New York, NY. That is the designation recorded for this NPI in the federal registry, where it is listed as “Endocrinology, Diabetes & Metabolism”.

NPI registry

Where is Dr. Sum located?

Dr. Sum is listed at 902 Broadway Ste 1603, New York, NY 10010. Addresses come from the NPI registry and can lag a move, so confirm before travelling.

NPI registry

What is Dr. Sum's phone number?

The number on file is (212) 379-4920. Guide.md cannot book appointments or pass on messages — please call the office directly.

NPI registry

What is the NPI for Dr. Sum?

Dr. Sum's National Provider Identifier is 1326369703. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.

NPI registry

Where did Dr. Sum go to medical school?

Dr. Sum attended Columbia University College of Physicians and Surgeons, graduating in 2010. This comes from the CMS National Downloadable File.

CMS public data

How much experience does Dr. Sum have?

Dr. Sum has 16 years experience. Calculated from a graduation year of 2010, reported in the CMS National Downloadable File.

CMS public data

What does Dr. Sum do most often?

According to Medicare billing data, Dr. Sum performs procedures including insertion of needle into vein for collection of blood sample; provides treatments such as continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.

Medicare claims

Is Dr. Sum's profile verified?

Not yet. This profile is built from public federal data and has not been confirmed by Dr. Sum. If this is you, claiming it is free.

Guide.md

Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.