Alan Keister, M.D.
NPI 1255373635 · Internal Medicine Physician · Amarillo, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alan Keister, M.D. is a Internal Medicine Physician provider in Amarillo, TX (NPI 1255373635).
Provider details
- NPI number
- 1255373635
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- K9315 (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
25,489 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 3,178 | $16 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 2,016 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 1,969 | $10 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 1,939 | $60 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 1,845 | $8 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 203 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 1,042 | 262 |
| Atorvastatin Calcium | 713 | 206 |
| Gabapentin | 529 | 149 |
| Lisinopril | 496 | 151 |
| Omeprazole | 396 | 130 |
| Tramadol Hcl | 389 | 114 |
| Potassium Chloride | 378 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,732 across 107 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
- 2006-06-12
- Last updated
- 2025-09-25
- Certified
- 2025-09-25
Frequently asked questions
- What is Alan Keister's NPI number?
- Alan Keister's National Provider Identifier (NPI) is 1255373635, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alan Keister's specialty?
- Alan Keister is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alan Keister located?
- Alan Keister's practice location on file with NPPES is 9092 Westgate Pkwy W, Amarillo, TX 79124-2441.
- What is Alan Keister's phone number?
- The practice phone number listed in the NPPES registry for Alan Keister is (806) 355-9741.
- Does Alan Keister accept Medicare?
- Alan Keister is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alan Keister's NPI active?
- Yes — Alan Keister's NPI (1255373635) is active in the NPPES registry as of the last update on 2025-09-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.