David Jaffe, MD
David Jaffe, MD is a Dermatology Physician in Havre De Grace, MD, registered under NPI 1427023811. This provider registers 4 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 930 REVOLUTION ST, Havre De Grace, MD 21078. 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 |
|---|---|---|
| D0045614 | MD | Dermatology Physician primary |
| D0045614 | MD | Dermatopathology Physician |
| D0045614 | MD | Pediatric Dermatology Physician |
| D0045614 | MD | Clinical & Laboratory Dermatological… |
This provider holds licence D0045614 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 - Dermatology
- PAC ID
- 0446234843
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Maryland | I20090219000498 | Practitioner - Dermatology |
| New Mexico | I20110510000313 | Practitioner - Dermatology |
Medicare enrolment is recorded as approved under the provider type Practitioner - Dermatology. There are 2 separate enrolment records across 2 states (MD, NM). 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 Dermatology covers
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging. NUCC Health Care Provider Taxonomy, code 207N00000X
All registered taxonomy codes
This provider registers 4 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207N00000X | Dermatology Physician | D0045614 | MD | primary |
| 207ND0900X | Dermatopathology Physician Dermatopathology | D0045614 | MD | |
| 207NP0225X | Pediatric Dermatology Physician Pediatric Dermatology | D0045614 | MD | |
| 207NI0002X | Clinical & Laboratory Dermatological Immunology Physician Clinical & Laboratory Dermatological Immunology | D0045614 | 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 | 1427023811 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 21, 2006 |
| Last updated | Mar 30, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MD |
| Practice address |
930 REVOLUTION ST Havre De Grace, MD 21078 (410) 939-0961 Fax (410) 939-7832 |
| Mailing address |
7300 RANCH ROAD 2222, BLDG 1, STE 200 Austin, TX 78730 |
| Other identifiers |
53092201
· Other (MD) S0450021 · Other (MD) F5190001 · Other (MD) 53092204 · 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 | 4 | 2 | 7 | 0 | 2 | 3 | 8 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 4 | 7 | 0 | 2 | 6 | 8 | 2 |
Sum = 59 · next multiple of 10 = 60 · 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.