Marisa Magana, M.D.
Marisa Magana, M.D. is an Internal Medicine Physician in San Diego, CA, registered under NPI 1194856286. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 200 W ARBOR DR DEPT OF MEDICINE, San Diego, CA 92103. 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 |
|---|---|---|
| A94464 | CA | Internal Medicine Physician primary |
| A94464 | CA | Pulmonary Disease Physician |
| A94464 | CA | Critical Care Medicine (Internal… |
This provider holds licence A94464 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 - Pulmonary Disease
- PAC ID
- 3870630478
Enrolled in Medicare 17 times, across 17 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| California | I20091030000591 | Practitioner - Pulmonary Disease |
| Texas | I20230123001917 | Practitioner - Critical Care (intensivists) |
| Indiana | I20230703002741 | Practitioner - Pulmonary Disease |
| North Carolina | I20241220002822 | Practitioner - Internal Medicine |
| Alabama | I20250108000435 | Practitioner - Internal Medicine |
| South Carolina | I20250214000024 | Practitioner - Internal Medicine |
| Missouri | I20250219001826 | Practitioner - Internal Medicine |
| Montana | I20250307000355 | Practitioner - Internal Medicine |
| Kansas | I20250311003500 | Practitioner - Internal Medicine |
| Kentucky | I20250312002437 | Practitioner - Internal Medicine |
| Ohio | I20250317001457 | Practitioner - Internal Medicine |
| Virginia | I20250319002630 | Practitioner - Pulmonary Disease |
| New Mexico | I20250522000647 | Practitioner - Internal Medicine |
| New York | I20250609000824 | Practitioner - Internal Medicine |
| Arkansas | I20250610004248 | Practitioner - Internal Medicine |
| Maine | I20250708001327 | Practitioner - Internal Medicine |
| Georgia | I20251030004685 | Practitioner - Internal Medicine |
Medicare enrolment is recorded as approved under the provider type Practitioner - Pulmonary Disease. There are 17 separate enrolment records across 17 states (CA, TX, IN, NC, AL, SC, MO, MT, KS, KY, OH, VA, NM, NY, AR, ME, GA). 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.
What Internal Medicine covers
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs. NUCC Health Care Provider Taxonomy, code 207R00000X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | A94464 | CA | primary |
| 207RP1001X | Pulmonary Disease Physician Pulmonary Disease | A94464 | CA | |
| 207RC0200X | Critical Care Medicine (Internal Medicine) Physician Critical Care Medicine | A94464 | CA |
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 | 1194856286 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 8, 2007 |
| Last updated | Jul 23, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
200 W ARBOR DR DEPT OF MEDICINE San Diego, CA 92103 (858) 657-7118 |
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 | 1 | 9 | 4 | 8 | 5 | 6 | 2 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 9 | 4 | 7 | 5 | 3 | 2 | 7 |
Sum = 64 · next multiple of 10 = 70 · check digit = 6 · actual last digit = 6
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.