James Tam, M.D.
NPI 1629215520 · Internal Medicine Physician · Long Beach, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Tam, M.D. is a Internal Medicine Physician provider in Long Beach, CA (NPI 1629215520).
Provider details
- NPI number
- 1629215520
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A106111 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 112 | 57 |
| Glipizide | 73 | 35 |
| Insulin Glargine-Yfgn | 63 | 21 |
| Metformin Hcl | 62 | 34 |
| Insulin Lisprobrand: Humalog Kwikpen U-100 | 54 | 24 |
| Metformin Hclbrand: Metformin Hcl Er | 49 | 26 |
| Semaglutidebrand: Ozempic |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-01-14
- Last updated
- 2023-09-26
Frequently asked questions
- What is James Tam's NPI number?
- James Tam's National Provider Identifier (NPI) is 1629215520, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Tam's specialty?
- James Tam is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Tam located?
- James Tam's practice location on file with NPPES is 2699 Atlantic Ave, Long Beach, CA 90806-2710.
- What is James Tam's phone number?
- The practice phone number listed in the NPPES registry for James Tam is (562) 426-3333.
- Does James Tam accept Medicare?
- James Tam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Tam's NPI active?
- Yes — James Tam's NPI (1629215520) is active in the NPPES registry as of the last update on 2023-09-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.