Thomas Fong, M.D.
NPI 1790812642 · Hematology & Oncology Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Fong, M.D. is a Hematology & Oncology Physician provider in Saint Louis, MO (NPI 1790812642).
Provider details
- NPI number
- 1790812642
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 2004012109 (MO)
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
18 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 18 | $132 |
Typical Medicare-allowed amounts for these services range $132–$132 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 36 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 244 | 86 |
| Prednisone | 121 | 34 |
| Dexamethasone | 107 | 26 |
| Abiraterone Acetate | 102 | 22 |
| Ondansetronbrand: Ondansetron Odt | 98 | 49 |
| Lenalidomide | 74 | 17 |
| Acyclovir | 65 | 17 |
| Hydroxyurea | 65 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-27
- Last updated
- 2021-11-29
Frequently asked questions
- What is Thomas Fong's NPI number?
- Thomas Fong's National Provider Identifier (NPI) is 1790812642, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Fong's specialty?
- Thomas Fong is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Fong located?
- Thomas Fong's practice location on file with NPPES is 660 S Euclid Ave, Saint Louis, MO 63110-1010.
- What is Thomas Fong's phone number?
- The practice phone number listed in the NPPES registry for Thomas Fong is (314) 747-8479.
- Does Thomas Fong accept Medicare?
- Thomas Fong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Fong's NPI active?
- Yes — Thomas Fong's NPI (1790812642) is active in the NPPES registry as of the last update on 2021-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.