Daniel John, M.D.
Daniel John, M.D. is an Undersea and Hyperbaric Medicine (Preventive Medicine) Physician in Baltimore, MD, registered under NPI 1306868773. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 6701 N CHARLES ST RM 4375, Baltimore, MD 21204. 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 |
|---|---|---|
| D33353 | MD | Undersea and Hyperbaric Medicine… primary |
| D33353 | MD | Surgery Physician |
This provider holds licence D33353 issued in MD. 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 - General Practice
- PAC ID
- 8729135017
- Enrollment ID
- I20180326000600
Medicare enrolment is recorded as approved under the provider type Practitioner - General Practice. 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 Undersea and Hyperbaric Medicine covers
A specialist who treats decompression illness and diving accident cases and uses hyperbaric oxygen therapy to treat such conditions as carbon monoxide poisoning, gas gangrene, non-healing wounds, tissue damage from radiation and burns and bone infections. This specialist also serves as consultant to other physicians in all aspects of hyperbaric chamber operations and assesses risks and applies appropriate standards to prevent disease and disability in divers and other persons working in altered atmospheric conditions. NUCC Health Care Provider Taxonomy, code 2083P0011X
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 | |
|---|---|---|---|---|
| 2083P0011X | Undersea and Hyperbaric Medicine (Preventive Medicine) Physician Undersea and Hyperbaric Medicine | D33353 | MD | primary |
| 208600000X | Surgery Physician | D33353 | MD |
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 | 1306868773 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 24, 2006 |
| Last updated | Nov 29, 2007 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
6701 N CHARLES ST RM 4375 Baltimore, MD 21204 (443) 849-8919 |
| Mailing address |
PO BOX 631568 Baltimore, MD 21263 |
| Other identifiers |
S1330002
· Other (MD) KJ66/52098202 · Other (MD) |
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 | 3 | 0 | 6 | 8 | 6 | 8 | 7 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 3 | 0 | 6 | 7 | 6 | 7 | 7 | 5 |
Sum = 67 · next multiple of 10 = 70 · check digit = 3 · actual last digit = 3
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.