John Halphen, M.D.
John Halphen, M.D. is a Geriatric Medicine (Family Medicine) Physician in Bellaire, TX, registered under NPI 1639289978.
Getting there
The practice address on file is 6500 WEST LOOP S STE 200, Bellaire, TX 77401. 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 |
|---|---|---|
| K3583 | TX | Geriatric Medicine (Family Medicine)… primary |
This provider holds licence K3583 issued in TX. 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 - Geriatric Medicine
- PAC ID
- 8729036967
- Enrollment ID
- I20080423000230
Medicare enrolment is recorded as approved under the provider type Practitioner - Geriatric Medicine. 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 Geriatric Medicine covers
A family medicine physician with special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes, and the hospital. NUCC Health Care Provider Taxonomy, code 207QG0300X
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 | 1639289978 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 30, 2006 |
| Last updated | Jun 7, 2025 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | M.D. |
| Practice address |
6500 WEST LOOP S STE 200 Bellaire, TX 77401 (713) 468-5150 |
| Mailing address |
1608 OAKDALE ST Houston, TX 77004 |
| Other identifiers |
096577403
· Medicaid (TX) 8W6316 · Other |
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 | 6 | 3 | 9 | 2 | 8 | 9 | 9 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 6 | 9 | 4 | 8 | 9 | 9 | 5 |
Sum = 82 · next multiple of 10 = 90 · check digit = 8 · actual last digit = 8
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.