NPI registry status
Active
2026 NPPES data Adult Medicine Physician NPI 1952665689 M.D.
Verify on CMS → Miguel Rivera-Viera, M.D.
Adult Medicine Physician in Carolina, 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 2,481 in Adult Medicine 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
4K
Medicare Part D claims · 124 beneficiaries · Adult Medicine Physician avg: 3K
Generic prescribing
82%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Miguel Rivera-Viera, M.D. filed 3,596 Medicare Part D claims in 2023 as a Adult Medicine Physician in Carolina, Puerto Rico, prescribing 82% generic.
- 4K
- Part D claims, 2023
- 82%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Miguel Rivera-Viera, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,596 Top 10% higher than 90% 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 certification likely (heuristic, not verified)
Miguel Rivera-Viera, M.D. 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 Miguel Rivera-Viera, M.D.?
Quality data not reportedPrimary specialty
Adult Medicine Physician
Medicare Part D claims
3,596 28% vs specialty avg
Specialty distribution in Puerto Rico
How Adult Medicine 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 Adult Medicine 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).
Miguel Rivera-Viera, M.D. appears in the CMS NPPES registry as a Adult Medicine Physician provider holding M.D. credentials at AVE 65 INFANTERIA, Carolina, PR, 00987, with a listed phone of (787) 757-1800. NPI 1952665689 was issued on 06/27/2012.
Medicare Part D records for calendar year 2023 show 3,596 prescription claims written by this provider, covering 124 Medicare beneficiaries and totaling roughly $214K in drug spend, split 15% brand-name and 82% generic by claim count.
Adult Medicine Physician is a narrow specialty nationwide, with 2,481 enrolled providers across 52 states and an average of 2,807 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 | 1952665689 |
|---|---|
| Specialty | Adult Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/27/2012 |
Hospital and facility affiliations
Facilities where Miguel Rivera-Viera, M.D. 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.
Hpm Foundation Inc
San Juan, PR
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
Miguel Rivera-Viera, M.D. - brand share 15.0%
Adult Medicine Physician average
15% brand-name claims vs 82% generic, on 3,596 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.
3,596
Total Claims
$214K
Total Drug Cost
124
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,085
- Total Day Supply
- 149,823
- Brand vs Generic
- 15% brand / 82% generic
- Brand Drug Cost
- $176K
- Generic Drug Cost
- $35K
Patient Demographics
- Average Patient Age
- 69.8 years
- Avg HCC Risk Score
- 1.29
- Gender Split
- 63% female / 37% male
- Age Distribution
- <65: 16, 65-74: 77, 75-84: 19, 85+: 12
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Miguel Rivera-Viera, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
241 claims
- Losartan Potassium
Losartan Potassium
166 claims
- Simvastatin
Simvastatin
161 claims
- Synthroid
Synthroid
147 claims
- Lisinopril
Lisinopril
146 claims
- Amlodipine Besylate
Amlodipine Besylate
141 claims
- Hydrochlorothiazide
Hydrochlorothiazide
140 claims
- Metformin Hcl
Metformin Hcl
133 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 241 |
| Losartan Potassium | 166 |
| Simvastatin | 161 |
| Synthroid Levothyroxine Sodium | 147 |
| Lisinopril | 146 |
| Amlodipine Besylate | 141 |
| Hydrochlorothiazide | 140 |
| Metformin Hcl | 133 |
| Metoprolol Succinate | 118 |
| Gabapentin | 114 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Adult Medicine Physician Overview
How Miguel Rivera-Viera, M.D. fits within the Adult Medicine Physician landscape nationally.
2,481
Adult Medicine Physician Providers in US
52
States with Adult Medicine Physician
2,807
Avg Claims per Provider
Miguel Rivera-Viera, M.D.'s 3,596 claims are above the specialty average of 2,807.
Nearby Adult Medicine Physician Providers in Puerto Rico
Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Rivera-Viera.
Dr. Esperanza Alvarez Rosales
MD
Arecibo, PR
Dr. Nestor Amador-Chacon
MD
Manati, PR
Dr. Carlos Bujosa
M.D.
Guaynabo, PR
Dr. Julio Luis Cadiz Velazquez
M.D
Ponce, PR
Dr. Oreste Castellanos
M.D.
Mayaguez, PR
Compare Adult Medicine 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 Adult Medicine 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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Medical Specialties Explained
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Frequently Asked Questions
What is Miguel Rivera-Viera, M.D.'s specialty? ▼
Miguel Rivera-Viera, M.D. specializes in Adult Medicine Physician and practices in Carolina, Puerto Rico. Credentials: M.D..
How much does Miguel Rivera-Viera, M.D. prescribe under Medicare Part D? ▼
In 2023, Miguel Rivera-Viera, M.D. wrote 3,596 Medicare Part D claims totaling $214K in drug costs for 124 beneficiaries.
Where is Miguel Rivera-Viera, M.D. located? ▼
Miguel Rivera-Viera, M.D. is located at AVE 65 INFANTERIA, Carolina, PR, 00987. Phone: (787) 757-1800.
What is Miguel Rivera-Viera, M.D.'s NPI number? ▼
Miguel Rivera-Viera, M.D.'s National Provider Identifier (NPI) is 1952665689, issued on 06/27/2012.
Does Miguel Rivera-Viera, M.D. prescribe more brand-name or generic drugs? ▼
Miguel Rivera-Viera, M.D.'s prescribing is 15% brand-name and 82% generic drugs by claim count, with $176K in brand drug costs.
How many Adult Medicine Physician providers are there in the US? ▼
There are 2,481 Adult Medicine Physician providers across 52 states in the US. The average Adult Medicine Physician provider writes 2,807 Medicare Part D claims per year.
What drugs does Miguel Rivera-Viera, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Miguel Rivera-Viera, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Losartan Potassium, Simvastatin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Miguel Rivera-Viera, M.D. accept Medicare? ▼
Miguel Rivera-Viera, M.D. appears in CMS Medicare data with 3,596 Part D claims and 124 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Miguel Rivera-Viera, M.D.'s credentials? ▼
Miguel Rivera-Viera, M.D.'s NPI is 1952665689 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.