John Chandler, MD
NPI 1518958701 · Internal Medicine Physician · Amarillo, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Chandler, MD is a Internal Medicine Physician provider in Amarillo, TX (NPI 1518958701).
Provider details
- NPI number
- 1518958701
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- L7684 (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
20 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
642 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 465 | $121 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 75 | $14 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 60 | $87 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 22 | $172 |
| Transitional Care Management Services for Problem of at Least Moderate Complexity99495 | 20 | $196 |
Typical Medicare-allowed amounts for these services range $14–$196 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 90 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 237 | 67 |
| Losartan Potassium | 216 | 57 |
| Atorvastatin Calcium | 178 | 49 |
| Metformin Hcl | 159 | 46 |
| Potassium Chloride | 153 | 48 |
| Amlodipine Besylate | 151 | 39 |
| Furosemide | 141 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 across 1 record (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
- 2005-11-04
- Last updated
- 2009-11-23
Frequently asked questions
- What is John Chandler's NPI number?
- John Chandler's National Provider Identifier (NPI) is 1518958701, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Chandler's specialty?
- John Chandler is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Chandler located?
- John Chandler's practice location on file with NPPES is 6000 W 9th Ave, Amarillo, TX 79106-1702.
- What is John Chandler's phone number?
- The practice phone number listed in the NPPES registry for John Chandler is (806) 355-9531.
- Does John Chandler accept Medicare?
- John Chandler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Chandler's NPI active?
- Yes — John Chandler's NPI (1518958701) is active in the NPPES registry as of the last update on 2009-11-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.