Frederick Jacobsen, MD
Frederick Jacobsen, MD is a Sleep Medicine (Psychiatry & Neurology) Physician in Washington, DC, registered under NPI 1235256827. This provider registers 6 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 908 NEW HAMPSHIRE AVE NW STE 700, Washington, DC 20037. 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 |
|---|---|---|
| 14701 | DC | Sleep Medicine (Psychiatry & Neurology)… primary |
| 14701 | DC | Public Health & General Preventive… |
| 14701 | DC | Neurology Physician |
| 14701 | DC | Psychiatry Physician |
| 14701 | DC | Geriatric Psychiatry Physician |
| 14701 | DC | Clinical Pharmacology Physician |
This provider holds licence 14701 issued in DC. 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 Sleep Medicine covers
A Psychiatrist or Neurologist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic testing, diagnosis, management and prevention of sleep and circadian rhythm disorders. Sleep specialists treat patients of any age and use multidisciplinary approaches. Disorders managed by sleep specialists include, but are not limited to, sleep related breathing disorders, insomnia, hypersomnias, circadian rhythm sleep disorders, parasomnias and sleep related movement disorders. NUCC Health Care Provider Taxonomy, code 2084S0012X
All registered taxonomy codes
This provider registers 6 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2084S0012X | Sleep Medicine (Psychiatry & Neurology) Physician Sleep Medicine | 14701 | DC | primary |
| 2083P0901X | Public Health & General Preventive Medicine Physician Public Health & General Preventive Medicine | 14701 | DC | |
| 2084N0400X | Neurology Physician Neurology | 14701 | DC | |
| 2084P0800X | Psychiatry Physician Psychiatry | 14701 | DC | |
| 2084P0805X | Geriatric Psychiatry Physician Geriatric Psychiatry | 14701 | DC | |
| 208U00000X | Clinical Pharmacology Physician | 14701 | DC |
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 | 1235256827 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 26, 2007 |
| Last updated | Aug 12, 2008 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
908 NEW HAMPSHIRE AVE NW STE 700 Washington, DC 20037 (202) 234-1742 |
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 | 2 | 3 | 5 | 2 | 5 | 6 | 8 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 6 | 5 | 4 | 5 | 3 | 8 | 4 |
Sum = 63 · next multiple of 10 = 70 · check digit = 7 · actual last digit = 7
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.