Nancy Markus, M.D.
Nancy Markus, M.D. is a Surgical Oncology Physician in Rockville, MD, registered under NPI 1972509875. 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 9711 MEDICAL CENTER DR STE 112, Rockville, MD 20850. 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 |
|---|---|---|
| D0046514 | MD | Surgical Oncology Physician primary |
| D0046514 | MD | Specialist |
This provider holds licence D0046514 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 Surgery
- PAC ID
- 0345146965
- Enrollment ID
- I20031215000253
Medicare enrolment is recorded as approved under the provider type Practitioner - General Surgery. 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 Surgical Oncology covers
A surgical oncologist is a well-qualified surgeon who has obtained additional training and experience in the multidisciplinary approach to the prevention, diagnosis, treatment, and rehabilitation of cancer patients, and devotes a major portion of his or her professional practice to these activities and cancer research. NUCC Health Care Provider Taxonomy, code 2086X0206X
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 | |
|---|---|---|---|---|
| 2086X0206X | Surgical Oncology Physician Surgical Oncology | D0046514 | MD | primary |
| 174400000X | Specialist | D0046514 | 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 | 1972509875 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 24, 2005 |
| Last updated | Jan 27, 2015 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
9711 MEDICAL CENTER DR STE 112 Rockville, MD 20850 (301) 251-7797 Fax (301) 251-9145 |
| Mailing address |
9715 MEDICAL CENTER DR STE 327 Rockville, MD 20850 |
| Other identifiers |
553300700
· Medicaid (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 | 9 | 7 | 2 | 5 | 0 | 9 | 8 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 5 | 2 | 1 | 0 | 9 | 8 | 5 |
Sum = 65 · next multiple of 10 = 70 · check digit = 5 · actual last digit = 5
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.