Physician Profile
Unclaimed ProfileAbout TAN
Thomas B Tan, MD is a healthcare provider in Lake St Louis, MO specializing in medical oncology. Thomas is also listed as specializing in hematology & oncology. According to Medicare claims data, Thomas cared for 404 Medicare patients across 506 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (636) 639-8600
- Email not available
Practice Locations
400 MEDICAL PLZ STE 100
Lake St Louis, MO 63367
Procedures Most Often Billed to Medicare
506 services · 404 patients · 6 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
272 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
97 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
79 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
26 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
17 |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
15 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 6
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 1986 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Tan specialize in?
Dr. Tan is a medical oncology in Lake St Louis, MO. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “MEDICAL ONCOLOGY”.
NPI registry
Where is Dr. Tan located?
Dr. Tan is listed at 400 MEDICAL PLZ STE 100, Lake St Louis, MO 63367. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Tan's phone number?
The number on file is (636) 639-8600. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Tan's NPI number?
Dr. Tan's National Provider Identifier is 1275528382. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Tan go to medical school?
Dr. Tan attended Other, graduating in 1986. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Tan been practicing?
Dr. Tan has 40 years experience. Calculated from a graduation year of 1986, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Tan do most often?
According to Medicare billing data, Dr. Tan the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Tan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Tan. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.