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DR. MELISSA W SUM MD
NPI 1326369703
Internal Medicine - Endocrinology, Diabetes & Metabolism in New York, NY

Active since June 19, 2010Opted out of Medicare · through Feb 23, 2028
84.47/100
CMS Quality Rating
902 BROADWAY STE 1603, NEW YORK, NY 10010(212) 379-4920(212) 379-4923 Get Directions Write a Review

NPPES record last updated: April 23, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Apr 23, 2026, Apr 2, 2021, Apr 13, 2017 (3 updates tracked since 2017).

About Dr. Melissa W Sum Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MELISSA W SUM MD (NPI 1326369703) is an individual endocrinology, diabetes & metabolism provider in New York, New York, licensed in New York (274990) and active in the NPI registry since June 2010. She has opted out of Medicare through February 23, 2028 and remains eligible to order and refer, is affiliated with Nyu Langone Hospitals, and is a graduate of Columbia University College Of Physicians And Surgeons (2010).

NPPES Registry Identity

NPI1326369703
Entity TypeIndividualFemale
Primary Taxonomy207RE0101X
Provider Legal NameDR. MELISSA W SUMCredential: MD
Location Address902 BROADWAY STE 1603New York, NY 10010-6029
Mailing Address902 Broadway Ste 1603New York, NY 10010-6029 · (212) 379-4920 · Fax (212) 379-4923
Phone(212) 379-4920
Fax(212) 379-4923
Sole ProprietorNo
Medical School CMSColumbia University College Of Physicians And SurgeonsGraduated 2010
Enumeration DateJune 19, 2010
Last NPPES UpdateApril 23, 20263 updates tracked since enumeration
NPPES CertifiedApril 23, 2026
✔ NPI 1326369703 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in NY · 274990
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
902 BROADWAY STE 1603, New York, NY 10010
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Melissa W Sum Md has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from February 23, 2026 through February 23, 2028.

Opt-Out Effective DateFebruary 23, 2026
Opt-Out In Effect ThroughFebruary 23, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Areas of Expertise CMS Part B claims 7

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
328 services232 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
99 services72 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
96 services82 patients
Blood glucose (sugar) test performed by hand-held instrument 82962
A blood glucose test uses a handheld device to measure the amount of sugar in your blood. A small prick on your finger allows a drop of blood to be placed on a test strip, which is then read by the device. This helps monitor and manage diabetes effectively.
64 services51 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
32 services32 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
18 services17 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Nyu Langone Hospitals

Acute Care Hospitals · New York, NY
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330214
Location550 First AvenueNew York, NY 10016 · New York County
Emergency services Birthing friendly

Hospital For Special Surgery

Acute Care Hospitals · New York, NY
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330270
Location535 East 70th StreetNew York, NY 10021 · New York County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10010 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$150.24 typical visit price
range $65.69 – $198.19
Typical copayment $37.56 (range $16.42 – $49.54)
Most-billed visit code 99204
Established Patient
$114.88 typical visit price
range $21.20 – $160.66
Typical copayment $28.72 (range $5.30 – $40.16)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

84.47/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality93.33
Promoting Interoperability100
Improvement Activities40
Cost54.91

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
22 suppliers42 claims108 services$6.01 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
12 suppliers16 claims26 services$1.14 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
4 suppliers59 claims59 services$184.95 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. COSTANDINOS DIMITRIOS HANJIS M.D.
Internal Medicine
902 BROADWAY STE 1603
NEW YORK, NY 10010
New York County (212) 379-4920

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Melissa Sum's NPI number?

The NPI number for Melissa Sum is 1326369703. It was assigned to this individual provider in the NPPES registry on June 19, 2010.

Where is Melissa Sum located?

Melissa Sum practices at 902 Broadway Ste 1603, New York, NY 10010. The listed phone number is (212) 379-4920.

What is Melissa Sum's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Melissa Sum enrolled in Medicare?

No. Melissa Sum has opted out of Medicare through February 23, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

Is Melissa Sum affiliated with any hospitals?

According to CMS data, Melissa Sum is affiliated with Nyu Langone Hospitals and Hospital For Special Surgery.

When was this NPI record last updated?

The NPPES record for Melissa Sum was last updated on April 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.