Doctor profile · Federal record
Dr. Thomas Lam, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Alhambra, CA
- NPI 1437185295
- Accepts Medicare
- 45 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
333 S Garfield Ave Ste A
Alhambra, CA 918013895
(626) 284-1997
fax (626) 284-2549 - Mailing address
-
Po Box 7589
Alhambra, CA 918027589
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- June 17, 2025
- Year of graduation
- 1981 — 45 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- California #A44280
- Medicaid (2)
- CA #00A442800 · CA #00A442801
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1437185295. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
233
Distinct HCPCS
4
Medicare allowed
$27,813
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 123 | 93 | $98 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 40 | 40 | $196 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 38 | 37 | $105 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 32 | 32 | $122 |
In context: peer comparison
Among 1 peers in Alhambra Gastroenterology Physician, average services per provider: 58. This provider delivers 4.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
290
Patients
153
Total drug cost
$24,690
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Famotidine | Generic | 110 | 38 | $1,637 |
| Omeprazole | Generic | 72 | 32 | $777 |
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 44 | 43 | $1,100 |
| Gavilyte-C (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 27 | 27 | $513 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 13 | 13 | $249 |
| Vemlidy (Tenofovir Alafenamide) | Brand | 13 | 0 | $20,059 |
| Pantoprazole Sodium | Generic | 11 | 0 | $356 |
Frequently asked questions
What is Dr. Thomas Lam's medical specialty?
Dr. Thomas Lam practices Gastroenterology Physician in Alhambra, CA.
Where does Dr. Thomas Lam practice?
Dr. Thomas Lam practices at 333 S Garfield Ave Ste A, Alhambra, CA 918013895. Office phone: 6262841997.
What is Dr. Thomas Lam's NPI?
Dr. Thomas Lam's National Provider Identifier (NPI) is 1437185295, issued by NPPES.
Does Dr. Thomas Lam accept Medicare assignment?
Yes. Dr. Thomas Lam accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Thomas Lam commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Biopsy of large bowel using a flexible endoscope (HCPCS 45380); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.