Christopher Voss, MD
Christopher Voss, MD is an Addiction Medicine (Preventive Medicine) Physician in Clearlake, CA, registered under NPI 1942475538. This provider registers 4 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 15630 18TH AVE, Clearlake, CA 95422. 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 |
|---|---|---|
| 246812 | MA | Addiction Medicine (Preventive Medicine)… primary |
| 18710 | NH | Anesthesiology Physician |
| A103576 | CA | Anesthesiology Physician |
| 2464812 | MA | Anesthesiology Physician |
| A103576 | CA | Critical Care Medicine (Anesthesiology)… |
| ME137731 | FL | Critical Care Medicine (Anesthesiology)… |
| 15022 | NV | Interventional Pain Medicine Physician |
Licences are recorded in 5 states: MA, NH, CA, FL, NV. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Anesthesiology
- PAC ID
- 9739358698
Enrolled in Medicare 6 times, across 6 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Massachusetts | I20110810000025 | Practitioner - Anesthesiology |
| California | I20150911000830 | Practitioner - Anesthesiology |
| New Hampshire | I20180614001121 | Practitioner - Critical Care (intensivists) |
| Nevada | I20191206000424 | Practitioner - Pain Management |
| Florida | I20191230002014 | Practitioner - Critical Care (intensivists) |
| Arizona | I20210114001896 | Practitioner - Anesthesiology |
Medicare enrolment is recorded as approved under the provider type Practitioner - Anesthesiology. There are 6 separate enrolment records across 6 states (MA, CA, NH, NV, FL, AZ). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. 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.
Licensed in 5 states
This provider holds licences in 5 states: California, Florida, Massachusetts, New Hampshire and Nevada. The practice address on file is in Clearlake, 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
- A103576
- Specialty
- Anesthesiology Physician
- Licence
- ME137731
- Specialty
- Critical Care Medicine (Anesthesiology)…
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 Addiction Medicine covers
A physician engaged in the subspecialty practice of Addiction Medicine who specializes in the prevention, evaluation, diagnosis, treatment, and recovery of persons with the disease of addiction. NUCC Health Care Provider Taxonomy, code 2083A0300X
All registered taxonomy codes
This provider registers 7 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2083A0300X | Addiction Medicine (Preventive Medicine) Physician Addiction Medicine | 246812 | MA | primary |
| 207L00000X | Anesthesiology Physician | 18710 | NH | |
| 207L00000X | Anesthesiology Physician | A103576 | CA | |
| 207L00000X | Anesthesiology Physician | 2464812 | MA | |
| 207LC0200X | Critical Care Medicine (Anesthesiology) Physician Critical Care Medicine | A103576 | CA | |
| 207LC0200X | Critical Care Medicine (Anesthesiology) Physician Critical Care Medicine | ME137731 | FL | |
| 208VP0014X | Interventional Pain Medicine Physician Interventional Pain Medicine | 15022 | 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 | 1942475538 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 24, 2008 |
| Last updated | Jul 2, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
15630 18TH AVE Clearlake, CA 95422 (707) 994-6486 |
| Mailing address |
11 GREENWAY RD Windham, NH 03087 |
| Other identifiers |
A103576
· Other (CA) 15022 · Other (NV) |
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 | 4 | 2 | 4 | 7 | 5 | 5 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 8 | 2 | 8 | 7 | 1 | 5 | 6 |
Sum = 72 · next multiple of 10 = 80 · 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.