Cathy Gao, M.D.
Cathy Gao, M.D. is a Pain Medicine (Physical Medicine & Rehabilitation) Physician in Ellicott City, MD, registered under NPI 1487639720. 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 4801 DORSEY HALL DR SUITE 226, Ellicott City, MD 21042. 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 |
|---|---|---|
| D57718 | MD | Pain Medicine (Physical Medicine &… primary |
This provider holds licence D57718 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 - Physical Medicine And Rehabilitation
- PAC ID
- 7618952169
- Enrollment ID
- I20040621000483
Medicare enrolment is recorded as approved under the provider type Practitioner - Physical Medicine And Rehabilitation. 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 Pain Medicine covers
A physician who provides a high level of care, either as a primary physician or consultant, for patients experiencing problems with acute, chronic or cancer pain in both hospital and ambulatory settings. Patient care needs may also be coordinated with other specialists. NUCC Health Care Provider Taxonomy, code 2081P2900X
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 | 1487639720 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 9, 2005 |
| Last updated | Jan 16, 2014 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | M.D. |
| Practice address |
4801 DORSEY HALL DR SUITE 226 Ellicott City, MD 21042 (410) 992-7440 Fax (443) 276-0349 |
| Mailing address |
11601 QUARTERFIELD RD Ellicott City, MD 21042 |
| Other identifiers |
409914100
· 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 | 4 | 8 | 7 | 6 | 3 | 9 | 7 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 7 | 7 | 3 | 3 | 9 | 7 | 4 |
Sum = 70 · next multiple of 10 = 70 · check digit = 0 · actual last digit = 0
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.