Ryann Hattori, CRNA
Ryann Hattori, CRNA is a Certified Registered Nurse Anesthetist in Houston, TX, registered under NPI 1003171380.
Getting there
Here is what surrounds this office in Houston, based on OpenStreetMap data collected Aug 29, 2026. Parking is available about 0.38 mi away at Texas Medical Center Parking Garage 8. The nearest transit stop is 891 ft away, served by Texas Medical Center Transit Center. A pharmacy sits 940 ft from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.22 mi away.
Getting here and what is nearby
Restaurant Chick-fil-A 415 ft ~2 min
6621 Fannin Street, Foodcourt 77030
Mo-Fr 10:30-18:30; Su off
Transit Holcombe Blvd @ Fannin St 481 ft ~2 min
Hotel InterContinental 748 ft ~3 min
Hotel SureStay Plus by Best Western Houston Medical Center 759 ft ~3 min
Hotel DoubleTree by Hilton Houston Medical Center Hotel & Suites 850 ft ~4 min
Pharmacy Walgreens 820 ft ~4 min
Transit Texas Medical Center Transit Center 888 ft ~4 min
Transit Texas Medical Center Transit Center 891 ft ~4 min
Pharmacy CVS Pharmacy 940 ft ~4 min
6622 Fannin Street, Houston 77030
Restaurant Pizza Hut 963 ft ~4 min
Restaurant MOD Pizza 980 ft ~4 min
Coffee Starbucks 0.20 mi ~5 min
Coffee JuiceLand 0.22 mi ~5 min
Parking Scurlock Tower Parking 0.27 mi ~6 min
6560 Fannin Street, Houston 77030
Parking Smith Tower Parking 0.35 mi ~7 min
6550 Fannin Street, Houston 77030
Parking Texas Medical Center Parking Garage 8 0.38 mi ~8 min
2151 West Holcombe Boulevard, 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 |
|---|---|---|
| 743340 | TX | Certified Registered Nurse Anesthetist primary |
This provider holds licence 743340 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 - Certified Registered Nurse Anesthetist (crna)
- PAC ID
- 9830355189
- Enrollment ID
- I20120731000809
Medicare enrolment is recorded as approved under the provider type Practitioner - Certified Registered Nurse Anesthetist (crna). 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 Nurse Anesthetist, Certified Registered covers
(1) A licensed registered nurse with advanced specialty education in anesthesia who, in collaboration with appropriate health care professionals, provides preoperative, intraoperative, and postoperative care to patients and assists in management and resuscitation of critical patients in intensive care, coronary care, and emergency situations. Nurse anesthetists are certified following successful completion of credentials and state licensure review and a national examination directed by the Council on Certification of Nurse Anesthetists. (2) A registered nurse who is qualified by special training to administer anesthesia in collaboration with a physician or dentist and who can assist in the care of patients who are in critical condition. NUCC Health Care Provider Taxonomy, code 367500000X
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 | 1003171380 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 12, 2012 |
| Last updated | Jul 12, 2012 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | CRNA |
| Practice address |
6701 FANNIN ST Houston, TX 77030 (832) 824-1000 |
| Mailing address |
2 GREENWAY PLZ STE 300 Houston, TX 77046 |
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 | 7 | 1 | 3 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 7 | 2 | 3 | 7 |
Sum = 50 · next multiple of 10 = 50 · check digit = 0 · actual last digit = 0
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.