Michael Lum, MD
NPI 1376030650 · Internal Medicine Physician · Stony Brook, NY
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Lum, MD is a Internal Medicine Physician provider in Stony Brook, NY (NPI 1376030650).
Provider details
- NPI number
- 1376030650
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 309986 (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
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
358 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 245 | $131 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 81 | $146 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 32 | $142 |
Typical Medicare-allowed amounts for these services range $131–$146 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 101 Nicolls RdStony Brook, NY 11794-0001Phone: (631) 689-8333
Registry dates
- Enumerated
- 2018-04-22
- Last updated
- 2021-07-21
- Certified
- 2021-07-21
Frequently asked questions
- What is Michael Lum's NPI number?
- Michael Lum's National Provider Identifier (NPI) is 1376030650, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Lum's specialty?
- Michael Lum is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Lum located?
- Michael Lum's practice location on file with NPPES is 101 Nicholls Road, Stony Brook, NY 11794.
- What is Michael Lum's phone number?
- The practice phone number listed in the NPPES registry for Michael Lum is (631) 689-8333.
- Does Michael Lum accept Medicare?
- Michael Lum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Lum's NPI active?
- Yes — Michael Lum's NPI (1376030650) is active in the NPPES registry as of the last update on 2021-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.