Miguel Santiago Cruz, MD
Miguel Santiago Cruz, MD is a Neuro-ophthalmology Physician in Carolina, PR, registered under NPI 1548815681. This provider registers 2 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 AVE 65 DE INFANTERIA KM 12.3, Carolina, PR 00985. 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 |
|---|---|---|
| 24642 | PR | Neuro-ophthalmology Physician primary |
| 24642 | PR | Neurology Physician |
This provider holds licence 24642 issued in PR. 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 - Neurology
- PAC ID
- 8123447570
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Massachusetts | I20240703002735 | Practitioner - Neurology |
| Puerto Rico | I20251031004223 | Practitioner - Neurology |
Medicare enrolment is recorded as approved under the provider type Practitioner - Neurology. There are 2 separate enrolment records across 2 states (MA, PR). 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 Neuro-ophthalmology covers
A neuro-ophthalmologist is a subspecialist of ophthalmology. This physician evaluates, treats, and studies disorders of the eye, orbit and nervous system having to do with interactions of the visual motor and visual sensory systems with the central nervous system. Neuro-ophthalmologists manage patients with complex and severe neuro-ophthalmological disorders. NUCC Health Care Provider Taxonomy, code 207WX0109X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207WX0109X | Neuro-ophthalmology Physician Neuro-ophthalmology | 24642 | PR | primary |
| 2084N0400X | Neurology Physician Neurology | 24642 | PR |
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 | 1548815681 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 6, 2019 |
| Last updated | May 14, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MD |
| Practice address |
AVE 65 DE INFANTERIA KM 12.3 Carolina, PR 00985 (787) 769-2477 Fax (787) 276-0065 |
| Mailing address |
PO BOX 190990 San Juan, PR 00919 |
| Other identifiers |
24642
· Other (PR) |
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 | 5 | 4 | 8 | 8 | 1 | 5 | 6 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 5 | 8 | 8 | 7 | 1 | 1 | 6 | 7 |
Sum = 69 · next multiple of 10 = 70 · check digit = 1 · actual last digit = 1
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.