NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1699731661 M.D.
Verify on CMS → John Rivera, M.D.
Family Medicine Physician in Milldale, Connecticut.
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
142
Medicare Part D claims · 79 beneficiaries · Family Medicine Physician avg: 4K
Generic prescribing
47%
generic claims · 53% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$196.02
10 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
John Rivera, M.D. filed 142 Medicare Part D claims in 2024 as a Family Medicine Physician in Milldale, Connecticut, prescribing 47% generic.
- 142
- Part D claims, 2024
- 47%
- generic prescribing
- $196.02
- industry payments (Sunshine Act)
- ≥34th
- 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 John Rivera, 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 1699731661), first enumerated 04/26/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 142 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.
- Reported
Industry payment transparency
$196.02 in reported industry payments (10 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1699731661 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1699731661
- ENUM-LEGACY 2006
- TAX-MEGA 150K Family Medicine
- RX-LIGHT 142
- BOOK-LIGHT 923 in Connecticut
- PHOTO-ENUM Sandra McCormack · 2006
John Rivera, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
142 ≥ 34th percentile 34% 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)
John Rivera, 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 John Rivera, M.D.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
142 96% vs specialty avg
Specialty distribution in Connecticut
How Family Medicine Physician compares to other specialties among Connecticut 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 | 1699731661 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 04/26/2006 |
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 John Rivera, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$196
Largest payer
ABBVIE 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.
Brand vs generic prescribing mix · Brand-heavy
John Rivera, M.D. - brand share 53.0%
Family Medicine Physician average
53% brand-name claims vs 47% generic, on 142 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.
142
Total Claims
$24K
Total Drug Cost
79
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 205.2
- Total Day Supply
- 4,237
- Brand vs Generic
- 53% brand / 47% generic
- Brand Drug Cost
- $23K
- Generic Drug Cost
- $2K
Patient Demographics
- Average Patient Age
- 73.7 years
- Avg HCC Risk Score
- 1.05
- Gender Split
- 49% female / 51% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What John Rivera, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Abrysvo
Abrysvo
37 claims
- Shingrix
Shingrix
21 claims
- Montelukast Sodium
Montelukast Sodium
15 claims
- Boostrix Tdap 12
Boostrix Tdap
12 claims
| Drug | Claims |
|---|---|
| Abrysvo Rsv Vacc, Pref A And Pref B/Pf | 37 |
| Shingrix Varicella-Zoster Ge/As01b/Pf | 21 |
| Montelukast Sodium | 15 |
| Boostrix Tdap Diphth,pertuss(Acell),tet Vac | 12 |
* 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 John Rivera, 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
John Rivera, M.D.'s 142 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 Rivera, both outside Connecticut 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 Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Rivera.
One of 923 Family Medicine Physician providers enrolled in Connecticut, 5 are shown here.
Dr. Thomas Abbenante
M.D.
Milford, CT
Dr. Yadira Acevedo
MD
Portland, CT
Dr. Rodrigo Acosta
M.D.
Stamford, CT
Dr. Momina Afrede
DO
Vernon, CT
Dr. Alireza Afshar
MD
Newtown, CT
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is John Rivera, M.D.'s specialty? ▼
John Rivera, M.D. specializes in Family Medicine Physician and practices in Milldale, Connecticut. Credentials: M.D..
How much does John Rivera, M.D. prescribe under Medicare Part D? ▼
In 2024, John Rivera, M.D. wrote 142 Medicare Part D claims totaling $24K in drug costs for 79 beneficiaries.
Where is John Rivera, M.D. located? ▼
John Rivera, M.D. is located at 1753 MERIDEN WATERBURY RD, Milldale, CT, 06467. Phone: (860) 621-5554.
What is John Rivera, M.D.'s NPI number? ▼
John Rivera, M.D.'s National Provider Identifier (NPI) is 1699731661, issued on 04/26/2006.
Does John Rivera, M.D. prescribe more brand-name or generic drugs? ▼
John Rivera, M.D.'s prescribing is 53% brand-name and 47% generic drugs by claim count, with $23K 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 John Rivera, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, John Rivera, M.D.'s most frequently prescribed drugs include Abrysvo, Shingrix, Montelukast Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Rivera, M.D. accept Medicare? ▼
John Rivera, M.D. appears in CMS Medicare data with 142 Part D claims and 79 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Rivera, M.D.'s credentials? ▼
John Rivera, M.D.'s NPI is 1699731661 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.