John Caster, MD
NPI 1902849854 · Internal Medicine Physician · Springfield, MO
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Caster, MD is a Internal Medicine Physician provider in Springfield, MO (NPI 1902849854).
Provider details
- NPI number
- 1902849854
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 108915 (MO)
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
4,782 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 | 622 | $118 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 568 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 519 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 486 | $8 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 408 | $13 |
| Manual Urinalysis Test With Examination Using Microscope, Automated81001 | 400 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 157 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 591 | 154 |
| Amlodipine Besylate | 524 | 135 |
| Levothyroxine Sodium | 495 | 99 |
| Lisinopril | 487 | 128 |
| Omeprazole | 365 | 92 |
| Gabapentin | 336 | 78 |
| Losartan Potassium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,981 across 121 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
- 2006-06-14
- Last updated
- 2017-03-02
Frequently asked questions
- What is John Caster's NPI number?
- John Caster's National Provider Identifier (NPI) is 1902849854, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Caster's specialty?
- John Caster is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Caster located?
- John Caster's practice location on file with NPPES is 1001 E Primrose St, Springfield, MO 65807-5155.
- What is John Caster's phone number?
- The practice phone number listed in the NPPES registry for John Caster is (417) 875-3000.
- Does John Caster accept Medicare?
- John Caster is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Caster's NPI active?
- Yes — John Caster's NPI (1902849854) is active in the NPPES registry as of the last update on 2017-03-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.