Melissa Sum, MD
NPI 1326369703 · Endocrinology, Diabetes & Metabolism Physician · New York, NY
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Melissa Sum, MD is a Endocrinology, Diabetes & Metabolism Physician provider in New York, NY (NPI 1326369703).
Provider details
- NPI number
- 1326369703
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 274990 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,042 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| 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'SG2211 | 388 | $18 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 328 | $142 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 99 | $9 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 96 | $200 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 64 | $3 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 191 | 60 |
| Levothyroxine Sodiumbrand: Synthroid | 148 | 41 |
| Alendronate Sodium | 91 | 33 |
| Tirzepatidebrand: Mounjaro | 76 | 16 |
| Metformin Hcl | 75 | 25 |
| Atorvastatin Calcium | 52 | 18 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-06-19
- Last updated
- 2026-04-23
- Certified
- 2026-04-23
Frequently asked questions
- What is Melissa Sum's NPI number?
- Melissa Sum's National Provider Identifier (NPI) is 1326369703, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Melissa Sum's specialty?
- Melissa Sum is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Melissa Sum located?
- Melissa Sum's practice location on file with NPPES is 902 Broadway Ste 1603, New York, NY 10010-6029.
- What is Melissa Sum's phone number?
- The practice phone number listed in the NPPES registry for Melissa Sum is (212) 379-4920.
- Does Melissa Sum accept Medicare?
- Melissa Sum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Melissa Sum's NPI active?
- Yes — Melissa Sum's NPI (1326369703) is active in the NPPES registry as of the last update on 2026-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.