Melissa W. Sum, MD
Endocrinology, Diabetes & Metabolism Physician · New York, NY
Melissa W. Sum, MD is an endocrinology, diabetes & metabolism physician with a practice address in New York, New York, and NPI 1326369703, issued on Jun 19, 2010. Check the license (New York 274990, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Melissa W. Sum
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 274990 NY
Self-reported in NPPES; status is on the state search - Practice location
- 902 Broadway Ste 1603, New York, NY 10010
- Phone
- (212) 379-4920
- Enumerated
- Jun 19, 2010
- Record last updated
- Apr 23, 2026
- Fax
- (212) 379-4923
- Medicare enrollment
- Enrolled (PECOS I20170705001299); may accept Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 970 in New York → Look up another NPI →
Also registered at 902 Broadway Ste 1603
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Costandinos Hanjis, M.D.Internal Medicine Physician1316140056
Verify Melissa W. Sum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 274990Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,171 Medicare Part D claims for 219 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% of claims.
Most prescribed
- Levothyroxine Sodium191 claims
- Synthroid148 claims
- Alendronate Sodium91 claims
- Mounjaro76 claims
- Metformin Hcl75 claims
- Atorvastatin Calcium52 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 84.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Melissa W. Sum among 970 endocrinology, diabetes & metabolism physician records in New York
Melissa W. Sum, MD is one of 970 endocrinology, diabetes & metabolism physician records with a practice address in New York. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 62% of them.
- NPI issued2010 · 62% of these records are older, 35% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2010 · median 2004 among the 694 with a school on file
- Record last updated2026 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in New York
There are 970 endocrinology, diabetes & metabolism physician records in New York.
All 970 in New York → Every provider in New York → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Michael Bergman, MDNew York, NY 100101871519157
- Ann Danoff, M.D.New York, NY 100101548203102
- Kristen Decarlo, M.D.New York, NY 100101982042214
- Brenda DorcelyNew York, NY 100101104182062
- John Easaw, M.DNew York, NY 100101235166919
- Connie Newman, MDNew York, NY 100101871708701
- Marie Pulini, M.D.New York, NY 100101407917909
- Nina Sundaram, MDNew York, NY 100101982862298
Common questions
What is Melissa W. Sum, MD's NPI number?
Melissa W. Sum, MD's National Provider Identifier (NPI) is 1326369703, issued on Jun 19, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Melissa W. Sum, MD located?
The NPPES record lists a practice address at 902 Broadway Ste 1603, New York, NY, 10010. Phone: (212) 379-4920. Providers update this record themselves, so call before visiting.
How can I verify Melissa W. Sum, MD's license?
NPPES lists New York license number 274990, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Melissa W. Sum, MD prescribe under Medicare Part D?
In 2024, Melissa W. Sum, MD had 1,171 Medicare Part D claims for 219 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Melissa W. Sum, MD's MIPS final score?
The 2023 MIPS final score is 84.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.