NATIONAL INSTITUTES OF HEALTH
NATIONAL INSTITUTES OF HEALTH is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1891992848, based in Bethesda, MD. The organization lists 2 taxonomy classifications, with Orthoptist recorded as primary.
Getting there
The practice address on file is 10 CENTER DR BUILDING 10 ROOM 10D45, Bethesda, MD 20892. 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 |
|---|---|---|
| 43401 - JCAHPO | MN | Orthoptist primary |
This provider holds licence 43401 - JCAHPO issued in MN. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
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.
What Orthoptist covers
An orthoptist is an allied health professional skilled in evaluation and treatment of children and adults with eye movement difficulties. Their specialty is strabismus, amblyopia, and double vision. NUCC Health Care Provider Taxonomy, code 156FX1900X
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 | |
|---|---|---|---|---|
| 156FX1900X | Orthoptist Orthoptist | 43401 - JCAHPO | MN | primary |
| 251K00000X | Public Health or Welfare Agency | — | IL |
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1891992848 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Jul 2, 2007 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Practice address |
10 CENTER DR BUILDING 10 ROOM 10D45 Bethesda, MD 20892 (301) 402-2863 Fax (301) 480-1566 |
| Mailing address |
25716 WOODFIELD RD Damascus, MD 20872 |
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 | 8 | 9 | 1 | 9 | 9 | 2 | 8 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 9 | 1 | 9 | 9 | 4 | 8 | 8 |
Sum = 82 · next multiple of 10 = 90 · 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.