John Halphen, M.D.
NPI 1639289978 · Geriatric Medicine (Family Medicine) Physician · Bellaire, TX
Enrolled with Medicare as Practitioner - Geriatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Halphen, M.D. is a Geriatric Medicine (Family Medicine) Physician provider in Bellaire, TX (NPI 1639289978).
Provider details
- NPI number
- 1639289978
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Family Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- K3583 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
124 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 45 | $127 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 44 | $223 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 22 | $182 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 13 | $169 |
Typical Medicare-allowed amounts for these services range $127–$223 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 38 | 11 |
| Tamsulosin Hcl | 36 | 12 |
| Sertraline Hcl | 36 | — |
| Atorvastatin Calcium | 35 | 15 |
| Levothyroxine Sodium | 33 | 12 |
| Gabapentin | 29 | — |
| Amlodipine Besylate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-30
- Last updated
- 2025-06-07
- Certified
- 2025-06-06
Frequently asked questions
- What is John Halphen's NPI number?
- John Halphen's National Provider Identifier (NPI) is 1639289978, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Halphen's specialty?
- John Halphen is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is John Halphen located?
- John Halphen's practice location on file with NPPES is 6500 West Loop S Ste 200, Bellaire, TX 77401-3535.
- What is John Halphen's phone number?
- The practice phone number listed in the NPPES registry for John Halphen is (713) 468-5150.
- Does John Halphen accept Medicare?
- John Halphen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Halphen's NPI active?
- Yes — John Halphen's NPI (1639289978) is active in the NPPES registry as of the last update on 2025-06-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.