NPI registry status
Active
2026 NPPES data Hospitalist Physician NPI 1225322654 MD
Verify on CMS → Norwin Rivera-Guzman, MD
Hospitalist 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 16,938 in Hospitalist 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 · 219 beneficiaries · Hospitalist Physician avg: 888
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, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Norwin Rivera-Guzman, MD filed 1,480 Medicare Part D claims in 2023 as a Hospitalist Physician in Bayamon, Puerto Rico, prescribing 88% generic.
- 1K
- Part D claims, 2023
- 88%
- generic prescribing
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.
Norwin Rivera-Guzman, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,480 Top 20% higher than 80% 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)
Norwin Rivera-Guzman, MD 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 Norwin Rivera-Guzman, MD?
Quality data not reportedPrimary specialty
Hospitalist Physician
Medicare Part D claims
1,480 67% vs specialty avg
Specialty distribution in Puerto Rico
How Hospitalist 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 Hospitalist 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).
Norwin Rivera-Guzman, MD appears in the CMS NPPES registry as a Hospitalist Physician provider holding MD credentials at PASEO SAN PABLO #100, Bayamon, PR, 00961, with a listed phone of (787) 786-6792. NPI 1225322654 was issued on 06/02/2011.
Medicare Part D records for calendar year 2023 show 1,480 prescription claims written by this provider, covering 219 Medicare beneficiaries and totaling roughly $129K in drug spend, split 12% brand-name and 88% generic by claim count.
Hospitalist Physician is a mid-sized specialty nationwide, with 16,938 enrolled providers across 54 states and an average of 888 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 | 1225322654 |
|---|---|
| Specialty | Hospitalist Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/02/2011 |
Brand vs generic prescribing mix · Typical
Norwin Rivera-Guzman, MD - brand share 12.0%
Hospitalist Physician average
12% brand-name claims vs 88% generic, on 1,480 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.
1,480
Total Claims
$129K
Total Drug Cost
219
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,940
- Total Day Supply
- 57,932
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $113K
- Generic Drug Cost
- $15K
Patient Demographics
- Average Patient Age
- 73.6 years
- Avg HCC Risk Score
- 1.73
- Gender Split
- 65% female / 35% male
- Age Distribution
- <65: 20, 65-74: 101, 75-84: 75, 85+: 23
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Norwin Rivera-Guzman, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amlodipine Besylate
Amlodipine Besylate
286 claims
- Metoprolol Succinate
Metoprolol Succinate
149 claims
- Atorvastatin Calcium
Atorvastatin Calcium
120 claims
- Hydrochlorothiazide
Hydrochlorothiazide
120 claims
- Losartan Potassium 91
Losartan Potassium
91 claims
- Eliquis 76
Eliquis
76 claims
- Rosuvastatin Calcium 65
Rosuvastatin Calcium
65 claims
- Lisinopril 47
Lisinopril
47 claims
| Drug | Claims |
|---|---|
| Amlodipine Besylate | 286 |
| Metoprolol Succinate | 149 |
| Atorvastatin Calcium | 120 |
| Hydrochlorothiazide | 120 |
| Losartan Potassium | 91 |
| Eliquis Apixaban | 76 |
| Rosuvastatin Calcium | 65 |
| Lisinopril | 47 |
| Losartan-Hydrochlorothiazide Losartan/Hydrochlorothiazide | 44 |
| Isosorbide Mononitrate Er Isosorbide Mononitrate | 43 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hospitalist Physician Overview
How Norwin Rivera-Guzman, MD fits within the Hospitalist Physician landscape nationally.
16,938
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider
Norwin Rivera-Guzman, MD's 1,480 claims are above the specialty average of 888.
Nearby Hospitalist 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-Guzman.
Dr. Jose Adaime Martinez
MD
San Juan, PR
Dr. Diana Allende
M.D.
Mayaguez, PR
Dr. Nelson Alvarez Cardin
MD
San Juan, PR
Dr. Miguel Anzalota Del Toro
MD, MPH
Guaynabo, PR
Dr. Sylvia Arce
M.D.
Mayaguez, PR
Compare Hospitalist 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 Hospitalist 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 Norwin Rivera-Guzman, MD's specialty? ▼
Norwin Rivera-Guzman, MD specializes in Hospitalist Physician and practices in Bayamon, Puerto Rico. Credentials: MD.
How much does Norwin Rivera-Guzman, MD prescribe under Medicare Part D? ▼
In 2023, Norwin Rivera-Guzman, MD wrote 1,480 Medicare Part D claims totaling $129K in drug costs for 219 beneficiaries.
Where is Norwin Rivera-Guzman, MD located? ▼
Norwin Rivera-Guzman, MD is located at PASEO SAN PABLO #100, Bayamon, PR, 00961. Phone: (787) 786-6792.
What is Norwin Rivera-Guzman, MD's NPI number? ▼
Norwin Rivera-Guzman, MD's National Provider Identifier (NPI) is 1225322654, issued on 06/02/2011.
Does Norwin Rivera-Guzman, MD prescribe more brand-name or generic drugs? ▼
Norwin Rivera-Guzman, MD's prescribing is 12% brand-name and 88% generic drugs by claim count, with $113K in brand drug costs.
How many Hospitalist Physician providers are there in the US? ▼
There are 16,938 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does Norwin Rivera-Guzman, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Norwin Rivera-Guzman, MD's most frequently prescribed drugs include Amlodipine Besylate, Metoprolol Succinate, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Norwin Rivera-Guzman, MD accept Medicare? ▼
Norwin Rivera-Guzman, MD appears in CMS Medicare data with 1,480 Part D claims and 219 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Norwin Rivera-Guzman, MD's credentials? ▼
Norwin Rivera-Guzman, MD's NPI is 1225322654 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.
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.