John Leiner, M.D.
NPI 1962571596 · Internal Medicine Physician · Quincy, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Leiner, M.D. is a Internal Medicine Physician provider in Quincy, IL (NPI 1962571596).
Provider details
- NPI number
- 1962571596
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 0101224017 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
897 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) |
|---|---|---|
| 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 | 413 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 378 | $93 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 68 | $63 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 21 | $138 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 17 | $128 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 93 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 280 | 81 |
| Amlodipine Besylate | 251 | 73 |
| Lisinopril | 228 | 70 |
| Rosuvastatin Calcium | 174 | 64 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 156 | 42 |
| Empagliflozinbrand: Jardiance | 103 | 35 |
Practice location
Mailing address
Additional practice locations (1)
- 4800 Maine StQuincy, IL 62305-5875Phone: (217) 223-8400Fax: (217) 224-9383
Registry dates
- Enumerated
- 2006-11-07
- Last updated
- 2025-01-20
- Certified
- 2025-01-20
Frequently asked questions
- What is John Leiner's NPI number?
- John Leiner's National Provider Identifier (NPI) is 1962571596, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Leiner's specialty?
- John Leiner is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Leiner located?
- John Leiner's practice location on file with NPPES is 927 Broadway St, Quincy, IL 62301-2719.
- What is John Leiner's phone number?
- The practice phone number listed in the NPPES registry for John Leiner is (217) 224-6423.
- Does John Leiner accept Medicare?
- John Leiner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Leiner's NPI active?
- Yes — John Leiner's NPI (1962571596) is active in the NPPES registry as of the last update on 2025-01-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.