John Clark, MD
NPI 1194798595 · Critical Care Medicine (Internal Medicine) Physician · Spartanburg, SC
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Clark, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Spartanburg, SC (NPI 1194798595).
Provider details
- NPI number
- 1194798595
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 19596 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
2,212 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 436 | $72 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 335 | $117 |
| Test to Measure Expiratory Airflow and Volume94010 | 243 | $25 |
| X-Ray of Chest, 2 Views71046 | 205 | $30 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 184 | $84 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 149 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 573 | 116 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 520 | 152 |
| Prednisone | 331 | 172 |
| Budesonide/Glycopyr/Formoterolbrand: Breztri Aerosphere | 150 | 39 |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 119 | 26 |
| Montelukast Sodium | 68 | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,799 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
- 2006-02-08
- Last updated
- 2015-12-28
Frequently asked questions
- What is John Clark's NPI number?
- John Clark's National Provider Identifier (NPI) is 1194798595, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Clark's specialty?
- John Clark is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is John Clark located?
- John Clark's practice location on file with NPPES is 2030 North Church Place, Spartanburg, SC 29303.
- What is John Clark's phone number?
- The practice phone number listed in the NPPES registry for John Clark is (864) 582-6858.
- Does John Clark accept Medicare?
- John Clark is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Clark's NPI active?
- Yes — John Clark's NPI (1194798595) is active in the NPPES registry as of the last update on 2015-12-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.