NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1982831939 MD
Verify on CMS → Alphonsus Diamond, MD
Family Medicine Physician in Monticello, Indiana.
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
8K
Medicare Part D claims · 508 beneficiaries · Family Medicine Physician avg: 4K
Generic prescribing
86%
generic claims · 13% 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
Alphonsus Diamond, MD filed 7,958 Medicare Part D claims in 2024 as a Family Medicine Physician in Monticello, Indiana, prescribing 86% generic.
- 8K
- Part D claims, 2024
- 86%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥97th
- 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 Alphonsus Diamond, MD
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 1982831939), first enumerated 06/17/2009.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 7,958 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
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- 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 1982831939 · Family Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1982831939
- ENUM-MID 2009
- TAX-MEGA 150K Family Medicine
- RX-MID 7,958
- BOOK-LIGHT 3,367 in Indiana
- PHOTO-ENUM Rebecca Siemers · 2009
Alphonsus Diamond, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
7,958 ≥ 97th percentile 97% 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 certification likely (heuristic, not verified)
Alphonsus Diamond, 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 Alphonsus Diamond, MD?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
7,958 126% vs specialty avg
Specialty distribution in Indiana
How Family Medicine Physician compares to other specialties among Indiana 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 | 1982831939 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/17/2009 |
Hospital and facility affiliations
Facilities where Alphonsus Diamond, 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.
Arnett Clinic LLC
Lafayette, IN
IU Health Medical Group LLC
Indianapolis, IN
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
Alphonsus Diamond, MD - brand share 13.0%
Family Medicine Physician average
13% brand-name claims vs 86% generic, on 7,958 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.
7,958
Total Claims
$1.0M
Total Drug Cost
508
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 17,786.267
- Total Day Supply
- 517,954
- Brand vs Generic
- 13% brand / 86% generic
- Brand Drug Cost
- $885K
- Generic Drug Cost
- $112K
- Opioid Claims
- 108 (1.4% rate)
- Antibiotic Claims
- 206
Patient Demographics
- Average Patient Age
- 71.6 years
- Avg HCC Risk Score
- 1.30
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 75, 65-74: 245, 75-84: 146, 85+: 42
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Alphonsus Diamond, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
567 claims
- Lisinopril
Lisinopril
342 claims
- Amlodipine Besylate
Amlodipine Besylate
299 claims
- Omeprazole
Omeprazole
288 claims
- Levothyroxine Sodium
Levothyroxine Sodium
272 claims
- Gabapentin
Gabapentin
229 claims
- Metoprolol Succinate 183
Metoprolol Succinate
183 claims
- Metformin Hcl Er 172
Metformin Hcl Er
172 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 567 |
| Lisinopril | 342 |
| Amlodipine Besylate | 299 |
| Omeprazole | 288 |
| Levothyroxine Sodium | 272 |
| Gabapentin | 229 |
| Metoprolol Succinate | 183 |
| Metformin Hcl Er Metformin Hcl | 172 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 170 |
| Losartan Potassium | 158 |
* 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 Alphonsus Diamond, MD 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
Alphonsus Diamond, MD's 7,958 claims are above the specialty average of 3,519.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Diamond, both outside Indiana so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Indiana
Other clinicians with the same primary specialty enrolled in Indiana, drawn from the same CMS NPPES roster as Diamond.
One of 3,367 Family Medicine Physician providers enrolled in Indiana, 5 are shown here.
Dr. Faryaal Aamir
MD
Boonville, IN
Dr. Melody Abadpour
MD
Lafayette, IN
Dr. Troy Abbott
MD
Muncie, IN
Dr. Musa Abdalla
M. D.
Lagrange, IN
Dr. Azra Abdullah
M.D.
Indianapolis, IN
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Alphonsus Diamond, MD's specialty? ▼
Alphonsus Diamond, MD specializes in Family Medicine Physician and practices in Monticello, Indiana. Credentials: MD.
How much does Alphonsus Diamond, MD prescribe under Medicare Part D? ▼
In 2024, Alphonsus Diamond, MD wrote 7,958 Medicare Part D claims totaling $1.0M in drug costs for 508 beneficiaries.
Where is Alphonsus Diamond, MD located? ▼
Alphonsus Diamond, MD is located at 810 S 6TH ST, Monticello, IN, 47960. Phone: (574) 583-6543.
What is Alphonsus Diamond, MD's NPI number? ▼
Alphonsus Diamond, MD's National Provider Identifier (NPI) is 1982831939, issued on 06/17/2009.
Does Alphonsus Diamond, MD prescribe more brand-name or generic drugs? ▼
Alphonsus Diamond, MD's prescribing is 13% brand-name and 86% generic drugs by claim count, with $885K in brand drug costs.
Does Alphonsus Diamond, MD prescribe opioids? ▼
Yes, Alphonsus Diamond, MD had 108 opioid claims in 2024 with an opioid prescribing rate of 1.4%.
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 Alphonsus Diamond, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Alphonsus Diamond, MD's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Alphonsus Diamond, MD accept Medicare? ▼
Alphonsus Diamond, MD appears in CMS Medicare data with 7,958 Part D claims and 508 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alphonsus Diamond, MD's credentials? ▼
Alphonsus Diamond, MD's NPI is 1982831939 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 (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.