Dr. Marc A. Johnson, MD
Internal Medicine (Internal Medicine Physician)
- Medicare participating
At a glance
- Medical school
- Icahn School of Medicine at Mount Sinai (1985)
- Years since graduation
- 41
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 76
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1985Medical school: Icahn School of Medicine at Mount Sinai
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Internal Medicine Physician primary
NC license 2009-00106
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Carolinas Medical Center/behav Health Charlotte, NC
Medical groups
- Carolinas Physicians Network Inc (2,325 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 76
- Services billed
- 7,140
- Patients’ average age
- 62
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 30-39 minutes | 140 | 78 |
| Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | 51 | 22 |
| Administration of influenza virus vaccine | 16 | 14 |
| Influenza vaccine, quadrivalent, preservative free, 0.5 ml dosage | 16 | 14 |
| Administration of vaccine | 11 | 11 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Biktarvy (bictegrav/emtricit/tenofov ala) | 1,217 |
| Dovato (dolutegravir sodium/lamivudine) | 685 |
| Tivicay (dolutegravir sodium) | 379 |
| Symtuza (darunavir/cob/emtri/tenof alaf) | 242 |
| Amlodipine Besylate Other prescribers in Charlotte, NC | 218 |
| Genvoya (elviteg/cob/emtri/tenof alafen) | 209 |
| Juluca (dolutegravir/rilpivirine) | 197 |
| Descovy (emtricitabine/tenofov alafenam) | 157 |
| Atorvastatin Calcium Other prescribers in Charlotte, NC | 154 |
| Lisinopril Other prescribers in Charlotte, NC | 115 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 2 companies reported 63 payments worth $63,884 in total to this clinician.
| Viiv Healthcare Company | $47,498 |
|---|---|
| Gilead Sciences, Inc. | $16,386 |
| Compensation for services other than consulting (speaking, faculty) | $58,995 |
|---|---|
| Travel and Lodging | $3,051 |
| Food and Beverage | $1,837 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Viiv Healthcare Company Mar 31, 2025 | Compensation for services other than consulting (speaking, faculty) CABENUVA · HIV | $7,150 |
| Viiv Healthcare Company Nov 7, 2025 | Compensation for services other than consulting (speaking, faculty) CABENUVA · HIV | $7,150 |
| Gilead Sciences, Inc. Apr 28, 2025 | Compensation for services other than consulting (speaking, faculty) Biktarvy · HIV Company’s description;4023603;GTF;10028975 | $5,400 |
| Viiv Healthcare Company Aug 19, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $2,600 |
| Viiv Healthcare Company Nov 25, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $2,600 |
| Viiv Healthcare Company Aug 19, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $2,600 |
| Viiv Healthcare Company Oct 28, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $2,600 |
| Viiv Healthcare Company Jul 16, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $2,600 |
| Gilead Sciences, Inc. Jun 12, 2025 | Compensation for services other than consulting (speaking, faculty)Company’s description;4111194;AHM;10028975 | $2,450 |
| Gilead Sciences, Inc. Aug 27, 2025 | Compensation for services other than consulting (speaking, faculty) Biktarvy · HIV Company’s description;4176650;AHM;10028975 | $2,450 |
All 38 payments other than meals, newest first
| Company | What it was for | Amount |
|---|---|---|
| Viiv Healthcare Company Dec 11, 2025 | Compensation for services other than consulting (speaking, faculty) CABENUVA · HIV | $1,300 |
| Viiv Healthcare Company Nov 25, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $2,600 |
| Gilead Sciences, Inc. Nov 20, 2025 | Compensation for services other than consulting (speaking, faculty) Biktarvy · HIV Company’s description;4286426;GTF;10028975 | $490 |
| Viiv Healthcare Company Nov 20, 2025 | Travel and Lodging CABENUVA · HIV · travel to Charlotte, NC | $145 |
| Gilead Sciences, Inc. Nov 18, 2025 | Compensation for services other than consulting (speaking, faculty)Company’s description;4262600;AHM;10028975 | $1,230 |
| Viiv Healthcare Company Nov 7, 2025 | Compensation for services other than consulting (speaking, faculty) CABENUVA · HIV | $7,150 |
| Viiv Healthcare Company Oct 29, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $1,300 |
| Viiv Healthcare Company Oct 28, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $2,600 |
| Gilead Sciences, Inc. Oct 28, 2025 | Compensation for services other than consulting (speaking, faculty)Company’s description;4259950;AHM;10028975 | $2,450 |
| Viiv Healthcare Company Oct 18, 2025 | Travel and Lodging travel to Atlanta, GA · in-kind | $75.08 |
| Viiv Healthcare Company Oct 7, 2025 | Travel and Lodging travel to Atlanta, GA · in-kind | $238 |
| Viiv Healthcare Company Sep 23, 2025 | Travel and Lodging travel to Atlanta, GA · in-kind | $622 |
| Viiv Healthcare Company Sep 23, 2025 | Travel and Lodging travel to Atlanta, GA · in-kind | $31.41 |
| Viiv Healthcare Company Sep 10, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $1,300 |
| Gilead Sciences, Inc. Aug 27, 2025 | Compensation for services other than consulting (speaking, faculty) Biktarvy · HIV Company’s description;4176650;AHM;10028975 | $2,450 |
| Viiv Healthcare Company Aug 19, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $2,600 |
| Viiv Healthcare Company Aug 19, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $2,600 |
| Viiv Healthcare Company Aug 6, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $1,625 |
| Viiv Healthcare Company Jul 16, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $2,600 |
| Viiv Healthcare Company Jul 16, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $1,625 |
| Gilead Sciences, Inc. Jun 12, 2025 | Compensation for services other than consulting (speaking, faculty)Company’s description;4111194;AHM;10028975 | $2,450 |
| Viiv Healthcare Company May 20, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $1,300 |
| Viiv Healthcare Company May 20, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $1,300 |
| Gilead Sciences, Inc. May 14, 2025 | Travel and Lodging Biktarvy · HIV · travel to Boston, MA Company’s description;4023894;GTF;10028975 | $84.80 |
| Gilead Sciences, Inc. Apr 28, 2025 | Compensation for services other than consulting (speaking, faculty) Biktarvy · HIV Company’s description;4023603;GTF;10028975 | $5,400 |
| Viiv Healthcare Company Apr 15, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $1,300 |
| Gilead Sciences, Inc. Apr 11, 2025 | Travel and Lodging Biktarvy · HIV · travel to Boston, MA · in-kind Company’s description;4023528;GTF;10028975 | $243 |
| Gilead Sciences, Inc. Apr 11, 2025 | Travel and Lodging Biktarvy · HIV · travel to Boston, MA · in-kind Company’s description;4023454;GTF;10028975 | $120 |
| Gilead Sciences, Inc. Apr 10, 2025 | Travel and Lodging Biktarvy · HIV · travel to Boston, MA · in-kind Company’s description;4023232;GTF;10028975 | $629 |
| Gilead Sciences, Inc. Apr 10, 2025 | Travel and Lodging Biktarvy · HIV · travel to Boston, MA · in-kind Company’s description;4023280;GTF;10028975 | $167 |
| Viiv Healthcare Company Apr 3, 2025 | Compensation for services other than consulting (speaking, faculty) CABENUVA · HIV | $1,300 |
| Viiv Healthcare Company Apr 3, 2025 | Travel and Lodging CABENUVA · HIV · travel to Charlotte, NC | $224 |
| Viiv Healthcare Company Mar 31, 2025 | Compensation for services other than consulting (speaking, faculty) CABENUVA · HIV | $7,150 |
| Viiv Healthcare Company Feb 28, 2025 | Travel and Lodging travel to Hollywood, FL · in-kind | $472 |
| Viiv Healthcare Company Jan 7, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $1,300 |
| Viiv Healthcare Company Jan 7, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $1,300 |
| Viiv Healthcare Company Jan 7, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $975 |
| Viiv Healthcare Company Jan 3, 2025 | Compensation for services other than consulting (speaking, faculty) DOVATO · HIV | $1,300 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.
Industry-funded research
Named as a principal investigator on 2 industry-funded studies in 2025, from 1 companies. The companies reported $50,050 in research payments for these studies, mostly to the institutions running them.
- A phase iiib, multi-center, non-randomized, parallel-group, open-label
Viiv Healthcare Company - A phase 3B, multicenter, single-arm, open-label study evaluating the e
Viiv Healthcare Company
From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.