NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1891805164 MD
Verify on CMS → Guireida Rivera Colon, MD
Endocrinology, Diabetes & Metabolism Physician in Juana Diaz, 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 7,852 in Endocrinology, Diabetes & Metabolism 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
13K
Medicare Part D claims · 866 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
61%
generic claims · 35% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$36.82
2 payments · CMS Open Payments (Sunshine Act)
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
Guireida Rivera Colon, MD filed 13,422 Medicare Part D claims in 2023 as a Endocrinology, Diabetes & Metabolism Physician in Juana Diaz, Puerto Rico, prescribing 61% generic.
- 13K
- Part D claims, 2023
- 61%
- 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.
Guireida Rivera Colon, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
13,422 Top 2% higher than 98% 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)
Guireida Rivera Colon, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Guireida Rivera Colon, MD?
Quality data not reportedPrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
13,422 5× vs specialty avg
Specialty distribution in Puerto Rico
How Endocrinology, Diabetes & Metabolism 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 Endocrinology, Diabetes & Metabolism 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).
Guireida Rivera Colon, MD appears in the CMS NPPES registry as a Endocrinology, Diabetes & Metabolism Physician provider holding MD credentials at 24 CALLE DR VEVE, Juana Diaz, PR, 00795, with a listed phone of (787) 837-5952. NPI 1891805164 was issued on 08/30/2006.
Medicare Part D records for calendar year 2023 show 13,422 prescription claims written by this provider, covering 866 Medicare beneficiaries and totaling roughly $1.7 million in drug spend, split 35% brand-name and 61% generic by claim count.
Endocrinology, Diabetes & Metabolism Physician is a mid-sized specialty nationwide, with 7,852 enrolled providers across 54 states and an average of 2,639 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 | 1891805164 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 08/30/2006 |
Hospital and facility affiliations
Facilities where Guireida Rivera Colon, 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.
Med Centro Inc
Ponce, PR
Nutrition Metabolism Education And Treatment Center
Ponce, 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).
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 Guireida Rivera Colon, MD. Source: openpaymentsdata.cms.gov.
Total received
$37
Largest payer
AstraZeneca Pharmaceuticals LP
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 · Above average
Guireida Rivera Colon, MD - brand share 35.0%
Endocrinology, Diabetes & Metabolism Physician average
35% brand-name claims vs 61% generic, on 13,422 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.
13,422
Total Claims
$1.7M
Total Drug Cost
866
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 22,675
- Total Day Supply
- 674,837
- Brand vs Generic
- 35% brand / 61% generic
- Brand Drug Cost
- $1.6M
- Generic Drug Cost
- $132K
- Antibiotic Claims
- 32
Patient Demographics
- Average Patient Age
- 72.3 years
- Avg HCC Risk Score
- 1.68
- Gender Split
- 72% female / 28% male
- Age Distribution
- <65: 110, 65-74: 401, 75-84: 291, 85+: 64
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Guireida Rivera Colon, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Synthroid
Synthroid
1,915 claims
- Levothyroxine Sodium 744
Levothyroxine Sodium
744 claims
- Rosuvastatin Calcium 718
Rosuvastatin Calcium
718 claims
- Glimepiride 454
Glimepiride
454 claims
- Atorvastatin Calcium 416
Atorvastatin Calcium
416 claims
- Janumet 398
Janumet
398 claims
- Gabapentin 391
Gabapentin
391 claims
- Losartan Potassium 387
Losartan Potassium
387 claims
| Drug | Claims |
|---|---|
| Synthroid Levothyroxine Sodium | 1,915 |
| Levothyroxine Sodium | 744 |
| Rosuvastatin Calcium | 718 |
| Glimepiride | 454 |
| Atorvastatin Calcium | 416 |
| Janumet Sitagliptin Phos/Metformin Hcl | 398 |
| Gabapentin | 391 |
| Losartan Potassium | 387 |
| Calcitriol | 306 |
| Simvastatin | 282 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Endocrinology, Diabetes & Metabolism Physician in PR →
All providers in Puerto Rico →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Guireida Rivera Colon, MD fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
7,852
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider
Guireida Rivera Colon, MD's 13,422 claims are above the specialty average of 2,639.
Nearby Endocrinology, Diabetes & Metabolism 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 Colon.
Dr. Anardi Agosto Mujica
M.D.
Cayey, PR
Dr. Manuel Alegre-Hernandez
MD
San Juan, PR
Dr. Myriam Allende-Vigo
MD
Humacao, PR
Dr. Milliette Alvarado-Santiago
M.D.
Rio Piedras, PR
Dr. Isabel Arroyo Gomez
MD
San Juan, PR
Compare Endocrinology, Diabetes & Metabolism 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 Endocrinology, Diabetes & Metabolism 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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How insurance networks affect your costs
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Frequently Asked Questions
What is Guireida Rivera Colon, MD's specialty? ▼
Guireida Rivera Colon, MD specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Juana Diaz, Puerto Rico. Credentials: MD.
How much does Guireida Rivera Colon, MD prescribe under Medicare Part D? ▼
In 2023, Guireida Rivera Colon, MD wrote 13,422 Medicare Part D claims totaling $1.7M in drug costs for 866 beneficiaries.
Where is Guireida Rivera Colon, MD located? ▼
Guireida Rivera Colon, MD is located at 24 CALLE DR VEVE, Juana Diaz, PR, 00795. Phone: (787) 837-5952.
What is Guireida Rivera Colon, MD's NPI number? ▼
Guireida Rivera Colon, MD's National Provider Identifier (NPI) is 1891805164, issued on 08/30/2006.
Does Guireida Rivera Colon, MD prescribe more brand-name or generic drugs? ▼
Guireida Rivera Colon, MD's prescribing is 35% brand-name and 61% generic drugs by claim count, with $1.6M in brand drug costs.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 7,852 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,639 Medicare Part D claims per year.
What drugs does Guireida Rivera Colon, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Guireida Rivera Colon, MD's most frequently prescribed drugs include Synthroid, Levothyroxine Sodium, Rosuvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Guireida Rivera Colon, MD accept Medicare? ▼
Guireida Rivera Colon, MD appears in CMS Medicare data with 13,422 Part D claims and 866 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Guireida Rivera Colon, MD's credentials? ▼
Guireida Rivera Colon, MD's NPI is 1891805164 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
Compiled from official public sources by the PlainDoctor editorial team.