Yu Cheng, M.D.
Yu Cheng, M.D. is a Hematology & Oncology Physician in Tracy, CA, registered under NPI 1003241118. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Tracy, based on OpenStreetMap data collected Sep 13, 2026. Parking is available about 0.40 mi away. A pharmacy sits 0.44 mi from the entrance (Rite Aid), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.44 mi away.
Getting here and what is nearby
Gas station 7-Eleven 0.37 mi ~8 min
Pharmacy Grant Line Pharmacy 0.38 mi ~8 min
Restaurant Carl's Jr. 0.39 mi ~8 min
Gas station National Fuel 0.40 mi ~8 min
Parking 0.40 mi ~9 min
Restaurant Black Bear Diner 0.40 mi ~9 min
Mo-Su 06:00-21:00
Gas station Arco 0.42 mi ~9 min
Coffee Bottoms Up 0.43 mi ~9 min
Coffee Quickly 0.44 mi ~9 min
2251 West Grant Line Road, Tracy 95377
Su-Th 11:30-20:30; Fr-Sa 11:30-21:00
Pharmacy Rite Aid 0.44 mi ~9 min
Restaurant Chili's 0.44 mi ~9 min
2030 West Grant Line Road, Tracy 95377
Hotel Home2 Suites 0.48 mi ~10 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| A138360 | CA | Student in an Organized Health Care… |
| A138360 | CA | Hematology & Oncology Physician primary |
This provider holds licence A138360 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Hematology/oncology
- PAC ID
- 0840587622
- Enrollment ID
- I20210806001248
Medicare enrolment is recorded as approved under the provider type Practitioner - Hematology/oncology. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Hematology & Oncology covers
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered. NUCC Health Care Provider Taxonomy, code 207RH0003X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 390200000X | Student in an Organized Health Care Education/Training Program | A138360 | CA | |
| 207RH0003X | Hematology & Oncology Physician Hematology & Oncology | A138360 | CA | primary |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003241118 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 8, 2013 |
| Last updated | Aug 12, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | M.D. |
| Practice address |
2200 ORCHARD PKWY STE 102 Tracy, CA 95377 (209) 830-4060 Fax (209) 830-4077 |
| Mailing address |
PO BOX 255228 Sacramento, CA 95865 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 2 | 4 | 1 | 1 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 4 | 2 | 1 | 2 |
Sum = 42 · next multiple of 10 = 50 · check digit = 8 · actual last digit = 8
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.