NPI registry status
Active
2026 NPPES data Transplant Surgery Physician NPI 1205979564 MD
Verify on CMS → Carlos Zayas, MD
Transplant Surgery Physician in Greenville, South Carolina.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,025 in Transplant Surgery Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
1K
Medicare Part D claims · 169 beneficiaries · Transplant Surgery Physician avg: 275
Generic prescribing
90%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$286.4
4 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Carlos Zayas, MD filed 1,467 Medicare Part D claims in 2023 as a Transplant Surgery Physician in Greenville, South Carolina, prescribing 90% generic.
- 1K
- Part D claims, 2023
- 90%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥80th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
CMS NPPES provider registry desk
NPI 1205979564 · Transplant Surgery Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1205979564
- ENUM-MID 2007
- TAX-NARROW 1,025
- RX-MID 1,467
- BOOK-THIN 14 in South Carolina
- PHOTO-ENUM Dan Hale · 2007
Carlos Zayas, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,467 ≥ 80th percentile 80% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Carlos Zayas, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Carlos Zayas, MD?
Quality data not reportedPrimary specialty
Transplant Surgery Physician
Medicare Part D claims
1,467 5× vs specialty avg
Specialty distribution in South Carolina
How Transplant Surgery Physician compares to other specialties among South Carolina providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Transplant Surgery Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1205979564 |
|---|---|
| Specialty | Transplant Surgery Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 02/15/2007 |
Hospital and facility affiliations
Facilities where Carlos Zayas, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Prisma Health University Medical Group
Duncan, SC
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Carlos Zayas, MD. Source: openpaymentsdata.cms.gov.
Total received
$286
Largest payer
SANOFI-AVENTIS U.S. LLC
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Generic-heavy
Carlos Zayas, MD - brand share 9.0%
Transplant Surgery Physician average
9% brand-name claims vs 90% generic, on 1,467 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,467
Total Claims
$198K
Total Drug Cost
169
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,264
- Total Day Supply
- 63,311
- Brand vs Generic
- 9% brand / 90% generic
- Brand Drug Cost
- $103K
- Generic Drug Cost
- $94K
- Opioid Claims
- 35 (2.4% rate)
- Antibiotic Claims
- 207
Patient Demographics
- Average Patient Age
- 61.1 years
- Avg HCC Risk Score
- 6.07
- Gender Split
- 55% female / 45% male
- Age Distribution
- <65: 82, 65-74: 62, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Carlos Zayas, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Sulfamethoxazole-T…
Sulfamethoxazole-Trimethoprim
122 claims
- Famotidine
Famotidine
114 claims
- Valganciclovir Hcl
Valganciclovir Hcl
89 claims
- Carvedilol
Carvedilol
68 claims
- Prednisone
Prednisone
56 claims
- Amlodipine Besylate
Amlodipine Besylate
51 claims
- Metoprolol Succinate 38
Metoprolol Succinate
38 claims
- Pantoprazole Sodium 37
Pantoprazole Sodium
37 claims
| Drug | Claims |
|---|---|
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 122 |
| Famotidine | 114 |
| Valganciclovir Hcl | 89 |
| Carvedilol | 68 |
| Prednisone | 56 |
| Amlodipine Besylate | 51 |
| Metoprolol Succinate | 38 |
| Pantoprazole Sodium | 37 |
| Nystatin | 33 |
| Atorvastatin Calcium | 31 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Transplant Surgery Physician Overview
How Carlos Zayas, MD fits within the Transplant Surgery Physician landscape nationally.
1,025
Transplant Surgery Physician Providers in US
48
States with Transplant Surgery Physician
275
Avg Claims per Provider
Carlos Zayas, MD's 1,467 claims are above the specialty average of 275.
Nationwide Transplant Surgery Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Zayas, both outside South Carolina so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Transplant Surgery Physician Providers in South Carolina
Other clinicians with the same primary specialty enrolled in South Carolina, drawn from the same CMS NPPES roster as Zayas.
One of 14 Transplant Surgery Physician providers enrolled in South Carolina, 5 are shown here.
Dr. Carolyn Britten
MD
Charleston, SC
Dr. Guido Cerilli
M.D.
Hilton Head, SC
Derek Dubay
Greenville, SC
Dr. Mahesh Gopasetty
MBBS, MS, MRCS
Charleston, SC
Siddharth Jain
Charleston, SC
Compare Transplant Surgery Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Carlos Zayas, MD's specialty? ▼
Carlos Zayas, MD specializes in Transplant Surgery Physician and practices in Greenville, South Carolina. Credentials: MD.
How much does Carlos Zayas, MD prescribe under Medicare Part D? ▼
In 2023, Carlos Zayas, MD wrote 1,467 Medicare Part D claims totaling $198K in drug costs for 169 beneficiaries.
Where is Carlos Zayas, MD located? ▼
Carlos Zayas, MD is located at 203 MILLS AVE # 9159, Greenville, SC, 29605. Phone: (864) 271-1844.
What is Carlos Zayas, MD's NPI number? ▼
Carlos Zayas, MD's National Provider Identifier (NPI) is 1205979564, issued on 02/15/2007.
Does Carlos Zayas, MD prescribe more brand-name or generic drugs? ▼
Carlos Zayas, MD's prescribing is 9% brand-name and 90% generic drugs by claim count, with $103K in brand drug costs.
Does Carlos Zayas, MD prescribe opioids? ▼
Yes, Carlos Zayas, MD had 35 opioid claims in 2023 with an opioid prescribing rate of 2.4%.
How many Transplant Surgery Physician providers are there in the US? ▼
There are 1,025 Transplant Surgery Physician providers across 48 states in the US. The average Transplant Surgery Physician provider writes 275 Medicare Part D claims per year.
What drugs does Carlos Zayas, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Carlos Zayas, MD's most frequently prescribed drugs include Sulfamethoxazole-Trimethoprim, Famotidine, Valganciclovir Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Carlos Zayas, MD accept Medicare? ▼
Carlos Zayas, MD appears in CMS Medicare data with 1,467 Part D claims and 169 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Carlos Zayas, MD's credentials? ▼
Carlos Zayas, MD's NPI is 1205979564 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.