William Giles, MD
NPI 1386662419 · Internal Medicine Physician · Gun Barrel City, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Giles, MD is a Internal Medicine Physician provider in Gun Barrel City, TX (NPI 1386662419).
Provider details
- NPI number
- 1386662419
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- M0730 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
543 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Outpatient Heart Rehabilitation With Electrocardiogram (ecg) Monitoring, Quality Health Care Professional Services93798 | 543 | $13 |
Typical Medicare-allowed amounts for these services range $13–$13 (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 · 156 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,165 | 340 |
| Levothyroxine Sodium | 546 | 156 |
| Losartan Potassium | 515 | 152 |
| Metformin Hcl | 409 | 124 |
| Lisinopril | 379 | 118 |
| Pantoprazole Sodium | 368 | 126 |
| Omeprazole |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,155 across 57 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-17
- Last updated
- 2009-01-08
Frequently asked questions
- What is William Giles's NPI number?
- William Giles's National Provider Identifier (NPI) is 1386662419, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Giles's specialty?
- William Giles is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Giles located?
- William Giles's practice location on file with NPPES is 126 W Main St, Gun Barrel City, TX 75156-5297.
- What is William Giles's phone number?
- The practice phone number listed in the NPPES registry for William Giles is (903) 713-1582.
- Does William Giles accept Medicare?
- William Giles is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Giles's NPI active?
- Yes — William Giles's NPI (1386662419) is active in the NPPES registry as of the last update on 2009-01-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.