NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1376571984 M.D.
Verify on CMS → Myriam Rios, M.D.
Family Medicine Physician in Caguas, 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 150,125 in Family 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
687
Medicare Part D claims · 73 beneficiaries · Family Medicine Physician avg: 4K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Myriam Rios, M.D. filed 687 Medicare Part D claims in 2024 as a Family Medicine Physician in Caguas, Puerto Rico, prescribing 88% generic.
- 687
- Part D claims, 2024
- 88%
- generic prescribing
- ≥68th
- 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.
Federal trust snapshot
What official records show about Myriam Rios, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1376571984), first enumerated 06/30/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 687 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1376571984 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1376571984
- ENUM-LEGACY 2006
- TAX-MEGA 150K Family Medicine
- RX-LIGHT 687
- BOOK-LIGHT 582 in Puerto Rico
- PHOTO-ENUM Joel Nilles · 2006
Myriam Rios, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
687 ≥ 68th percentile 68% of 1,416,883 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 · 2024
◑
Board-eligible specialty (heuristic, not verified)
Myriam Rios, 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 Myriam Rios, M.D.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
687 80% vs specialty avg
Specialty distribution in Puerto Rico
How Family 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 Family 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).
Practice Address
Provider Details
| NPI | 1376571984 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 06/30/2006 |
Brand vs generic prescribing mix · Typical
Myriam Rios, M.D. - brand share 12.0%
Family Medicine Physician average
12% brand-name claims vs 88% generic, on 687 2024 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 2024.
687
Total Claims
$29K
Total Drug Cost
73
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,380.767
- Total Day Supply
- 40,545
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $20K
- Generic Drug Cost
- $9K
Patient Demographics
- Average Patient Age
- 81.8 years
- Avg HCC Risk Score
- 1.37
- Gender Split
- 41% female / 59% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Myriam Rios, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
59 claims
- Losartan Potassium
Losartan Potassium
40 claims
- Amlodipine Besylate
Amlodipine Besylate
35 claims
- Gabapentin
Gabapentin
32 claims
- Synthroid
Synthroid
29 claims
- Pantoprazole Sodium
Pantoprazole Sodium
28 claims
- Levothyroxine Sodium
Levothyroxine Sodium
25 claims
- Memantine Hcl
Memantine Hcl
25 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 59 |
| Losartan Potassium | 40 |
| Amlodipine Besylate | 35 |
| Gabapentin | 32 |
| Synthroid Levothyroxine Sodium | 29 |
| Pantoprazole Sodium | 28 |
| Levothyroxine Sodium | 25 |
| Memantine Hcl | 25 |
| Sertraline Hcl | 25 |
| Tamsulosin Hcl | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Myriam Rios, M.D. fits within the Family Medicine Physician landscape nationally.
150,125
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,519
Avg Claims per Provider
Myriam Rios, M.D.'s 687 claims are below the specialty average of 3,519.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Rios, both outside Puerto Rico so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family 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 Rios.
One of 582 Family Medicine Physician providers enrolled in Puerto Rico, 5 are shown here.
Dr. Luis Acevedo-Marty
M.D.
Aguadilla, PR
Dr. Humberto Acosta
M.D.
Cabo Rojo, PR
Dr. Sheila Acosta
MD
Manati, PR
Dr. Greisha Adorno-Robles
MD
Barceloneta, PR
Dr. Georgina Aguirre
M.D.
Ponce, PR
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Myriam Rios, M.D.'s specialty? ▼
Myriam Rios, M.D. specializes in Family Medicine Physician and practices in Caguas, Puerto Rico. Credentials: M.D..
How much does Myriam Rios, M.D. prescribe under Medicare Part D? ▼
In 2024, Myriam Rios, M.D. wrote 687 Medicare Part D claims totaling $29K in drug costs for 73 beneficiaries.
Where is Myriam Rios, M.D. located? ▼
Myriam Rios, M.D. is located at T1-11 CALLE 28, Caguas, PR, 00727. Phone: (787) 744-8370.
What is Myriam Rios, M.D.'s NPI number? ▼
Myriam Rios, M.D.'s National Provider Identifier (NPI) is 1376571984, issued on 06/30/2006.
Does Myriam Rios, M.D. prescribe more brand-name or generic drugs? ▼
Myriam Rios, M.D.'s prescribing is 12% brand-name and 88% generic drugs by claim count, with $20K in brand drug costs.
How many Family Medicine Physician providers are there in the US? ▼
There are 150,125 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,519 Medicare Part D claims per year.
What drugs does Myriam Rios, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Myriam Rios, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Losartan Potassium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Myriam Rios, M.D. accept Medicare? ▼
Myriam Rios, M.D. appears in CMS Medicare data with 687 Part D claims and 73 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Myriam Rios, M.D.'s credentials? ▼
Myriam Rios, M.D.'s NPI is 1376571984 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.