Wei Jun Gu
NPI 1659875946 · Hospitalist Physician · New York, NY
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wei Jun Gu is a Hospitalist Physician provider in New York, NY (NPI 1659875946).
Provider details
- NPI number
- 1659875946
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
- License
- 306627 (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
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
381 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) |
|---|---|---|
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 215 | $192 |
| Prolonged Hospital Inpatient Or Observation Care Evaluation and Management Service(s) Beyond the Total Time for the Primary Service (when the Primary Service Has Been Selected Using Time on the Date of the Primary Service); Each Additional 15 Minutes By ThG0316 | 120 | $33 |
| Advance Care Planning, First 30 Minutes99497 | 46 | $83 |
Typical Medicare-allowed amounts for these services range $33–$192 (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 (2)
- Maimonides Medical Center4802 10th AvenueBrooklyn, NY 11219Phone: (718) 283-3000
- 27005 76th AveHospitalist DivisionNew Hyde Park, NY 11040-1402Phone: (516) 470-7000
Registry dates
- Enumerated
- 2018-03-21
- Last updated
- 2026-04-21
- Certified
- 2026-04-21
Frequently asked questions
- What is Wei Jun Gu's NPI number?
- Wei Jun Gu's National Provider Identifier (NPI) is 1659875946, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wei Jun Gu's specialty?
- Wei Jun Gu is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Wei Jun Gu located?
- Wei Jun Gu's practice location on file with NPPES is 1111 Amsterdam Ave, New York, NY 10025-1716.
- What is Wei Jun Gu's phone number?
- The practice phone number listed in the NPPES registry for Wei Jun Gu is (212) 523-2900.
- Does Wei Jun Gu accept Medicare?
- Wei Jun Gu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wei Jun Gu's NPI active?
- Yes — Wei Jun Gu's NPI (1659875946) is active in the NPPES registry as of the last update on 2026-04-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.