Thomas Lam, M.D.
NPI 1437185295 · Gastroenterology Physician · Alhambra, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Lam, M.D. is a Gastroenterology Physician provider in Alhambra, CA (NPI 1437185295).
Provider details
- NPI number
- 1437185295
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A44280 (CA)
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
19 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
345 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 192 | $99 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 65 | $120 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 26 | $115 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 21 | $465 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 15 | $297 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 287 | 282 |
| Omeprazole | 58 | 31 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 33 | 32 |
| Warfarin Sodium | 27 | — |
| Famotidine | 24 | 14 |
| Pantoprazole Sodium | 18 | — |
| Sucralfate | 15 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-24
- Last updated
- 2025-06-17
- Certified
- 2025-06-17
Frequently asked questions
- What is Thomas Lam's NPI number?
- Thomas Lam's National Provider Identifier (NPI) is 1437185295, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Lam's specialty?
- Thomas Lam is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Lam located?
- Thomas Lam's practice location on file with NPPES is 333 S Garfield Ave Ste a, Alhambra, CA 91801-3895.
- What is Thomas Lam's phone number?
- The practice phone number listed in the NPPES registry for Thomas Lam is (626) 284-1997.
- Does Thomas Lam accept Medicare?
- Thomas Lam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Lam's NPI active?
- Yes — Thomas Lam's NPI (1437185295) is active in the NPPES registry as of the last update on 2025-06-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.