NPI registry status
Active
2026 NPPES data Specialist NPI 1588659957 MD
Verify on CMS → Glen Diacon, MD
Specialist in Ada, Oklahoma.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 69,567 in Specialist, 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
6K
Medicare Part D claims · 1K beneficiaries · Specialist avg: 2K
MIPS score
12/100
▼ 71 pts below national avg 83.5 · Penalty band
Industry payments
$332.72
18 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Glen Diacon, MD reported a CMS MIPS final score of 12/100 - below the 83.5 national average - and filed 5,574 Medicare Part D claims in 2024.
- 12/100
- MIPS score · -71 vs avg
- 6K
- Part D claims, 2024
- $332.72
- industry payments (Sunshine Act)
- ≥2nd
- pct among measured MIPS (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 Glen Diacon, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1588659957), first enumerated 09/13/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 5,574 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 12/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Hospital affiliations
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$332.72 in reported industry payments (18 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 1588659957 · Specialist
NPI-10 · ENUM-LEGACY · TAX-MEGA · MIPS-LOW · RX-MID · BOOK-THIN · PHOTO-FINISH
- NPI-10 1588659957
- ENUM-LEGACY 2005
- TAX-MEGA 70K Specialist
- MIPS-LOW 12/100
- RX-MID 5,574
- BOOK-THIN 479 in Oklahoma
- PHOTO-FINISH Alfonso Barbati · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Katayoun Toosie …
Katayoun Toosie
11.9 MIPS pts
- Diacon · this pr…
Diacon · this provider
12 MIPS pts
- Alfonso Barbati …
Alfonso Barbati
12 MIPS pts
- Gordon Lui · hig…
Gordon Lui
12.1 MIPS pts
- Terence Delaney …
Terence Delaney
12.1 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Glen Diacon, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
12 ≥ 2nd percentile 2% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Glen Diacon, MD sits
This provider among specialist peers
Across the 4,261 specialist providers who report both Medicare Part D prescribing and a MIPS quality score, Glen Diacon, MD writes more Part D claims than 92% of them and scores higher on MIPS quality than 9% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one specialist peer from a representative sample of 60; the gold marker is Glen Diacon, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Glen Diacon, MD?
Below national averagePrimary specialty
Specialist
Medicare Part D claims
5,574 266% vs specialty avg
MIPS final score
12/100 71.5 pts vs avg
Specialty distribution in Oklahoma
How Specialist compares to other specialties among Oklahoma providers
Medicare quality performance, MIPS
Glen Diacon, MD's 2023 MIPS final score plotted against the Specialist national average
- MIPS Final Score
- 12/100
- vs 83.5 national avg · 2023 performance year
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 | 1588659957 |
|---|---|
| Specialty | Specialist |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 09/13/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
12.0463
Final Score
Measured-score avg: 83.5
0
Quality
40.1543
Cost
Reporting: Individual
Hospital and facility affiliations
Facilities where Glen Diacon, 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.
Chickasaw Nation Division OF Health
Ada, OK
Southern Oklahoma Urology, Inc
Ada, OK
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 Glen Diacon, MD. Source: openpaymentsdata.cms.gov.
Total received
$333
Largest payer
Medtronic, 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
5,574
Total Claims
$558K
Total Drug Cost
1,113
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,266.633
- Total Day Supply
- 172,694
- Generic Drug Cost
- $109K
- Opioid Claims
- 532 (9.5% rate)
- Antibiotic Claims
- 1,941
Patient Demographics
- Average Patient Age
- 71.7 years
- Avg HCC Risk Score
- 1.41
- Gender Split
- 38% female / 62% male
- Age Distribution
- <65: 187, 65-74: 453, 75-84: 364, 85+: 109
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Glen Diacon, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Tamsulosin Hcl
Tamsulosin Hcl
759 claims
- Ciprofloxacin Hcl
Ciprofloxacin Hcl
546 claims
- Oxycodone-Acetamin…
Oxycodone-Acetaminophen
482 claims
- Nitrofurantoin
Nitrofurantoin
471 claims
- Sulfamethoxazole-T… 232
Sulfamethoxazole-Trimethoprim
232 claims
- Oxybutynin Chloride 209
Oxybutynin Chloride
209 claims
- Methenamine Hippur… 203
Methenamine Hippurate
203 claims
- Escitalopram Oxalate 196
Escitalopram Oxalate
196 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 759 |
| Ciprofloxacin Hcl | 546 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 482 |
| Nitrofurantoin Nitrofurantoin Macrocrystal | 471 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 232 |
| Oxybutynin Chloride | 209 |
| Methenamine Hippurate | 203 |
| Escitalopram Oxalate | 196 |
| Levofloxacin | 193 |
| Cephalexin | 176 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Specialist Overview
How Glen Diacon, MD fits within the Specialist landscape nationally.
69,567
Specialist Providers in US
55
States with Specialist
1,524
Avg Claims per Provider
Glen Diacon, MD's 5,574 claims are above the specialty average of 1,524.
Nationwide Specialist peers with similar MIPS or enrollment year
Two federal-record peer sets for Diacon, both outside Oklahoma so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (12 here).
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Specialist Providers in Oklahoma
Other clinicians with the same primary specialty enrolled in Oklahoma, drawn from the same CMS NPPES roster as Diacon.
One of 479 Specialist providers enrolled in Oklahoma, 5 are shown here.
Keri Abbott
COSMETOLOGIST
Noble, OK
Kelley Abney
Okmulgee, OK
Kathleen Adams
RN, IBCLC
Broken Arrow, OK
Dr. Henry Allen
D.O.
Oklahoma City, OK
Shelby Allen
COTA
Lawton, OK
Compare Specialist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Glen Diacon, MD's specialty? ▼
Glen Diacon, MD specializes in Specialist and practices in Ada, Oklahoma. Credentials: MD.
How much does Glen Diacon, MD prescribe under Medicare Part D? ▼
In 2024, Glen Diacon, MD wrote 5,574 Medicare Part D claims totaling $558K in drug costs for 1,113 beneficiaries.
What is Glen Diacon, MD's Medicare quality score? ▼
Glen Diacon, MD has a CMS MIPS Final Score of 12/100 (Quality: 0, Cost: 40.2). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Glen Diacon, MD located? ▼
Glen Diacon, MD is located at 1414 ARLINGTON ST, Ada, OK, 74820. Phone: (580) 332-0112.
What is Glen Diacon, MD's NPI number? ▼
Glen Diacon, MD's National Provider Identifier (NPI) is 1588659957, issued on 09/13/2005.
Does Glen Diacon, MD prescribe opioids? ▼
Yes, Glen Diacon, MD had 532 opioid claims in 2024 with an opioid prescribing rate of 9.5%.
How many Specialist providers are there in the US? ▼
There are 69,567 Specialist providers across 55 states in the US. The average Specialist provider writes 1,524 Medicare Part D claims per year.
What drugs does Glen Diacon, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Glen Diacon, MD's most frequently prescribed drugs include Tamsulosin Hcl, Ciprofloxacin Hcl, Oxycodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Glen Diacon, MD accept Medicare? ▼
Glen Diacon, MD appears in CMS Medicare data with 5,574 Part D claims and 1,113 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Glen Diacon, MD's credentials? ▼
Glen Diacon, MD's NPI is 1588659957 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.