Alan Tso, M.D.
NPI 1871580647 · Internal Medicine Physician · Newark, NJ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alan Tso, M.D. is a Internal Medicine Physician provider in Newark, NJ (NPI 1871580647).
Provider details
- NPI number
- 1871580647
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 25MA08841200 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 75 | 34 |
| Lisinopril | 59 | 21 |
| Metformin Hcl | 47 | 19 |
| Amlodipine Besylate | 43 | 19 |
| Gabapentin | 42 | 16 |
| Losartan Potassium | 33 | — |
| Nifedipinebrand: Nifedipine Er |
Practice location
Mailing address
Additional practice locations (1)
- 10 Union Sq ESuite 3gNew York, NY 10003-3314Phone: (212) 844-8100
Registry dates
- Enumerated
- 2005-10-05
- Last updated
- 2022-02-25
- Certified
- 2022-02-25
Frequently asked questions
- What is Alan Tso's NPI number?
- Alan Tso's National Provider Identifier (NPI) is 1871580647, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alan Tso's specialty?
- Alan Tso is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alan Tso located?
- Alan Tso's practice location on file with NPPES is 741 Broadway, Newark, NJ 07104-4309.
- What is Alan Tso's phone number?
- The practice phone number listed in the NPPES registry for Alan Tso is (973) 483-1300.
- Does Alan Tso accept Medicare?
- Alan Tso is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alan Tso's NPI active?
- Yes — Alan Tso's NPI (1871580647) is active in the NPPES registry as of the last update on 2022-02-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.