John Douglas Clark, MD
Critical Care Medicine (Internal Medicine) Physician · Spartanburg, SC
John Douglas Clark, MD is a critical care medicine (internal medicine) physician with a practice address in Spartanburg, South Carolina, and NPI 1194798595, issued on Feb 8, 2006. Check the license (South Carolina 19596, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John Douglas Clark
- Credential
- MD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- 19596 SC
Self-reported in NPPES; status is on the state search - Practice location
- 2030 North Church Place, Spartanburg, SC 29303
- Phone
- (864) 582-6858
- Enumerated
- Feb 8, 2006
- Record last updated
- Dec 28, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (864) 585-0999
- Medicaid ID
- T36609 SC
- Medicare enrollment
- Enrolled (PECOS I20051020000955); accepts Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 1985
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 78 in South Carolina → Look up another NPI →
Also registered at 2030 North Church Place
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicole Crockford, PA-CPhysician Assistant1265480065
Verify John Douglas Clark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 19596Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.6 times the Medicare Part D claims of the average critical care medicine (internal medicine) physician in 2024
2,490 Medicare Part D claims for 430 beneficiaries, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D. Brand-name drugs were 63% of claims.
Most prescribed
- Trelegy Ellipta573 claims
- Albuterol Sulfate Hfa520 claims
- Prednisone331 claims
- Breztri Aerosphere150 claims
- Breo Ellipta119 claims
- Montelukast Sodium68 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,799.40
107 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 2,708 providers of this specialty with any payment received $2,958.68 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
John Douglas Clark among 78 critical care medicine (internal medicine) physician records in South Carolina
John Douglas Clark, MD is one of 78 critical care medicine (internal medicine) physician records with a practice address in South Carolina. 99% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 74% newer
- In a Medicare fileYes · 99% of these records are
- In the CMS Doctors and Clinicians fileYes · 92% of these records are
- Graduated1985 · median 2005 among the 72 with a school on file
- Record last updated2015 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in South Carolina
There are 78 critical care medicine (internal medicine) physician records in South Carolina.
All 78 in South Carolina → Every provider in Spartanburg → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Ryan Lapointe, MDSpartanburg, SC 293031184967929
- Rico V Mendoza, MDSpartanburg, SC 293031861466021
- Ikenna Onyebueke, MDSpartanburg, SC 293031700043106
- Christopher Powers, MDSpartanburg, SC 293031285605295
- Stuart Reynolds, M.D.Spartanburg, SC 293031316215171
- Max Rosenthal, MDSpartanburg, SC 293031326656224
- Wilson Smith, MDSpartanburg, SC 293031982675625
- Tatsiana Beiko, M.D.Charleston, SC 294011295037836
Common questions
What is John Douglas Clark, MD's NPI number?
John Douglas Clark, MD's National Provider Identifier (NPI) is 1194798595, issued on Feb 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Douglas Clark, MD located?
The NPPES record lists a practice address at 2030 North Church Place, Spartanburg, SC, 29303. Phone: (864) 582-6858. Providers update this record themselves, so call before visiting.
How can I verify John Douglas Clark, MD's license?
NPPES lists South Carolina license number 19596, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Douglas Clark, MD prescribe under Medicare Part D?
In 2024, John Douglas Clark, MD had 2,490 Medicare Part D claims for 430 beneficiaries; the average among critical care medicine (internal medicine) physician prescribers was 696. Part D covers Medicare prescriptions only.
What is John Douglas Clark, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.