Gerald Zavorsky, PHD, RRT
Gerald Zavorsky, PHD, RRT is a Registered Respiratory Therapist in Davis, CA, registered under NPI 1962386169. This provider registers 4 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
The practice address on file is 1275 MEDICAL SCIENCES DRIVE RM 4327, Davis, CA 95616. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 41216 | CA | Registered Respiratory Therapist primary |
| 194.011635 | IL | Pulmonary Function Technologist… |
| 881256-TGSS-0 | NV | Chemistry Pathology… |
| 307131 | LA | Clinical Exercise Physiologist |
| RC4113 | NV | Registered Respiratory Therapist |
| 194.011635 | IL | Registered Respiratory Therapist |
| 41216 | CA | Pulmonary Function Technologist… |
| RC4113 | NV | Pulmonary Function Technologist… |
Licences are recorded in 4 states: CA, IL, NV, LA. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
Licensed in 4 states
This provider holds licences in 4 states: California, Illinois, Louisiana and Nevada. The practice address on file is in Davis, CA, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- 41216
- Specialty
- Registered Respiratory Therapist
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Respiratory Therapist, Registered covers
A Registered Respiratory Therapist (RRT) is an advanced therapist who has passed standardized written and clinical simulation examinations administered by the National Board for Respiratory Care (NBRC). In addition, to the certified therapist (CRT) entry level skills, RRTs have advanced education and training in patient assessment, in the development and modification of patient care plans, and in assuring the appropriate utilization of respiratory care resources. An RRT is a graduate of an associate or baccalaureate degree producing educational programs approved by the Commission on Accreditation of Allied Health Education Programs (CAAHEP) and where applicable, is licensed by the state and is practicing within the scope of that license. NUCC Health Care Provider Taxonomy, code 227900000X
All registered taxonomy codes
This provider registers 8 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 227900000X | Registered Respiratory Therapist | 41216 | CA | primary |
| 2279P1006X | Pulmonary Function Technologist Registered Respiratory Therapist Pulmonary Function Technologist | 194.011635 | IL | |
| 246QC1000X | Chemistry Pathology Specialist/Technologist Chemistry | 881256-TGSS-0 | NV | |
| 224Y00000X | Clinical Exercise Physiologist | 307131 | LA | |
| 227900000X | Registered Respiratory Therapist | RC4113 | NV | |
| 227900000X | Registered Respiratory Therapist | 194.011635 | IL | |
| 2279P1006X | Pulmonary Function Technologist Registered Respiratory Therapist Pulmonary Function Technologist | 41216 | CA | |
| 2279P1006X | Pulmonary Function Technologist Registered Respiratory Therapist Pulmonary Function Technologist | RC4113 | NV |
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 | 1962386169 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 1, 2025 |
| Last updated | Aug 1, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | PHD, RRT |
| Practice address |
1275 MEDICAL SCIENCES DRIVE RM 4327 Davis, CA 95616 (530) 754-6016 |
| Mailing address |
4461 G ST Sacramento, CA 95819 |
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 | 9 | 6 | 2 | 3 | 8 | 6 | 1 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 3 | 2 | 6 | 8 | 3 | 1 | 3 |
Sum = 61 · next multiple of 10 = 70 · check digit = 9 · actual last digit = 9
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.