NPI registry status
Active
2026 NPPES data Hematology & Oncology Physician NPI 1487659462 M.D.
Verify on CMS → Carlos Chiesa, M.D.
Hematology & Oncology Physician in Bayamon, Puerto Rico.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 11,215 in Hematology & Oncology 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
510
Medicare Part D claims · 97 beneficiaries · Hematology & Oncology Physician avg: 847
Industry payments
$1.9K
77 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Carlos Chiesa, M.D. filed 510 Medicare Part D claims in 2023 as a Hematology & Oncology Physician in Bayamon, Puerto Rico.
- 510
- Part D claims, 2023
- $1.9K
- industry payments (Sunshine Act)
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.
Carlos Chiesa, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
510 Top 34% higher than 66% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Carlos Chiesa, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Carlos Chiesa, M.D.?
Quality data not reportedPrimary specialty
Hematology & Oncology Physician
Medicare Part D claims
510 40% vs specialty avg
Specialty distribution in Puerto Rico
How Hematology & Oncology Physician compares to other specialties among Puerto Rico 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 Hematology & Oncology 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).
Carlos Chiesa, M.D. appears in the CMS NPPES registry as a Hematology & Oncology Physician provider holding M.D. credentials at #66 SANTA CRUZ ST., Bayamon, PR, 00960, with a listed phone of (787) 787-5045. NPI 1487659462 was issued on 06/16/2005.
Medicare Part D records for calendar year 2023 show 510 prescription claims written by this provider, covering 97 Medicare beneficiaries and totaling roughly $1.3 million in drug spend, with an opioid prescribing rate of 5.3%.
Hematology & Oncology Physician is a mid-sized specialty nationwide, with 11,215 enrolled providers across 54 states and an average of 847 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1487659462 |
|---|---|
| Specialty | Hematology & Oncology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/16/2005 |
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 Chiesa, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$1.9K
Largest payer
Janssen Pharmaceuticals, Inc
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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
510
Total Claims
$1.3M
Total Drug Cost
97
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 553
- Total Day Supply
- 14,698
- Generic Drug Cost
- $124K
- Opioid Claims
- 27 (5.3% rate)
- Antibiotic Claims
- 12
Patient Demographics
- Average Patient Age
- 75.3 years
- Avg HCC Risk Score
- 2.22
- Gender Split
- 58% female / 42% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Carlos Chiesa, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Anastrozole
Anastrozole
59 claims
- Prednisone
Prednisone
37 claims
- Ondansetron Hcl
Ondansetron Hcl
30 claims
- Verzenio
Verzenio
28 claims
- Dexamethasone
Dexamethasone
25 claims
- Hydroxyurea 19
Hydroxyurea
19 claims
- Rosuvastatin Calcium 15
Rosuvastatin Calcium
15 claims
- Inqovi 13
Inqovi
13 claims
| Drug | Claims |
|---|---|
| Anastrozole | 59 |
| Prednisone | 37 |
| Ondansetron Hcl | 30 |
| Verzenio Abemaciclib | 28 |
| Dexamethasone | 25 |
| Hydroxyurea | 19 |
| Rosuvastatin Calcium | 15 |
| Inqovi Decitabine/Cedazuridine | 13 |
| Tramadol Hcl | 13 |
| Imatinib Mesylate | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hematology & Oncology Physician Overview
How Carlos Chiesa, M.D. fits within the Hematology & Oncology Physician landscape nationally.
11,215
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
847
Avg Claims per Provider
Carlos Chiesa, M.D.'s 510 claims are below the specialty average of 847.
Nearby Hematology & Oncology Physician Providers in Puerto Rico
Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Chiesa.
Dr. Jose Abreu Arbelo
MD
San Juan, PR
Dr. Luis Acaba
M.D.
San Juan, PR
Sifredo Acaron
Mayaguez, PR
Dr. Myrna Andino-Camacho
MD
Bayamon, PR
Dr. Antonio Aponte Gracia
M.D
Mayaguez, PR
Compare Hematology & Oncology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Puerto Rico medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hematology & Oncology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Carlos Chiesa, M.D.'s specialty? ▼
Carlos Chiesa, M.D. specializes in Hematology & Oncology Physician and practices in Bayamon, Puerto Rico. Credentials: M.D..
How much does Carlos Chiesa, M.D. prescribe under Medicare Part D? ▼
In 2023, Carlos Chiesa, M.D. wrote 510 Medicare Part D claims totaling $1.3M in drug costs for 97 beneficiaries.
Where is Carlos Chiesa, M.D. located? ▼
Carlos Chiesa, M.D. is located at #66 SANTA CRUZ ST., Bayamon, PR, 00960. Phone: (787) 787-5045.
What is Carlos Chiesa, M.D.'s NPI number? ▼
Carlos Chiesa, M.D.'s National Provider Identifier (NPI) is 1487659462, issued on 06/16/2005.
Does Carlos Chiesa, M.D. prescribe opioids? ▼
Yes, Carlos Chiesa, M.D. had 27 opioid claims in 2023 with an opioid prescribing rate of 5.3%.
How many Hematology & Oncology Physician providers are there in the US? ▼
There are 11,215 Hematology & Oncology Physician providers across 54 states in the US. The average Hematology & Oncology Physician provider writes 847 Medicare Part D claims per year.
What drugs does Carlos Chiesa, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Carlos Chiesa, M.D.'s most frequently prescribed drugs include Anastrozole, Prednisone, Ondansetron Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Carlos Chiesa, M.D. accept Medicare? ▼
Carlos Chiesa, M.D. appears in CMS Medicare data with 510 Part D claims and 97 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Carlos Chiesa, M.D.'s credentials? ▼
Carlos Chiesa, M.D.'s NPI is 1487659462 with credentials M.D.. 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
Compiled from official public sources by the PlainDoctor editorial team.