January Tsai, MD
January Tsai, MD is an Anesthesiology Physician in Houston, TX, registered under NPI 1003121237.
Getting there
Here is what surrounds this office in Houston, based on OpenStreetMap data collected Aug 30, 2026. Parking is available about 0.37 mi away at Texas Medical Center Garage 4. The nearest transit stop is 0.40 mi away. A pharmacy sits 0.25 mi from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.45 mi away.
Getting here and what is nearby
Restaurant Chick-fil-A 180 ft ~1 min
1515 Holcombe Boulevard, Houston 77030
Mo-Fr 11:00-19:00; Su off
Restaurant Chick-fil-A 675 ft ~3 min
6550 Bertner Avenue, Houston 77030
Mo-Fr 07:00-14:00; Su off
Restaurant Einstein Bros. Bagels 1,010 ft ~4 min
Coffee Starbucks 0.24 mi ~5 min
Pharmacy CVS Pharmacy 0.25 mi ~5 min
6622 Fannin Street, Houston 77030
Pharmacy Walgreens 0.25 mi ~5 min
Hotel The Westin Houston Medical Center 0.26 mi ~6 min
Parking Scurlock Tower Parking 0.29 mi ~6 min
6560 Fannin Street, Houston 77030
Parking Smith Tower Parking 0.31 mi ~7 min
6550 Fannin Street, Houston 77030
Transit Holcombe Blvd @ Fannin St 0.36 mi ~8 min
Parking Texas Medical Center Garage 4 0.37 mi ~8 min
1406 Cambridge Street, Houston 77030
Hotel SureStay Plus by Best Western Houston Medical Center 0.38 mi ~8 min
Transit Texas Medical Center Transit Center 0.40 mi ~8 min
Transit 0.40 mi ~8 min
Hotel InterContinental 0.40 mi ~9 min
Coffee Albert and Hazel Herzstein Trading Post 0.45 mi ~9 min
6200 Hermann Park Drive, Houston 77030
Coffee Twiga Café 0.45 mi ~10 min
6200 Hermann Park Drive, Houston 77030
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 |
|---|---|---|
| N5441 | TX | Anesthesiology Physician primary |
This provider holds licence N5441 issued in TX. 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 - Anesthesiology
- PAC ID
- 5698968865
- Enrollment ID
- I20101020000456
Medicare enrolment is recorded as approved under the provider type Practitioner - Anesthesiology. 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 Anesthesiology covers
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery. NUCC Health Care Provider Taxonomy, code 207L00000X
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 | 1003121237 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 12, 2010 |
| Last updated | Feb 21, 2011 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | MD |
| Practice address |
1515 HOLCOMBE BLVD Houston, TX 77030 (713) 792-6161 |
| Mailing address |
P O BOX 4439 Houston, TX 77210 |
| Other identifiers |
217477301
· Medicaid (TX) 8CN795 · Other (TX) |
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 | 1 | 2 | 1 | 2 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 2 | 2 | 2 | 6 |
Sum = 43 · next multiple of 10 = 50 · check digit = 7 · actual last digit = 7
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.