NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1871859801 MD
Verify on CMS → Gregory Barron, MD
Rheumatology Physician in Denver, Colorado.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,377 in Rheumatology 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
2K
Medicare Part D claims · 343 beneficiaries · Rheumatology Physician avg: 2K
MIPS score
99/100
▲ 16 pts above national avg 83.5 · Exceptional
Industry payments
$242.82
11 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Gregory Barron, MD reported a CMS MIPS final score of 99/100 - above the 83.5 national average - and filed 1,685 Medicare Part D claims in 2024.
- 99/100
- MIPS score · +16 vs avg
- 2K
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥91st
- 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 Gregory Barron, 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 1871859801), first enumerated 04/04/2012.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,685 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 99/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- 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
- Reported
Industry payment transparency
$242.82 in reported industry payments (11 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 1871859801 · Rheumatology Physician
NPI-10 · ENUM-MID · TAX-MID · MIPS-ELITE · RX-MID · BOOK-THIN · PHOTO-FINISH
- NPI-10 1871859801
- ENUM-MID 2012
- TAX-MID 6K Rheumatology Physician
- MIPS-ELITE 99/100
- RX-MID 1,685
- BOOK-THIN 120 in Colorado
- PHOTO-FINISH Maged Hosny, MD · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Barron · this pr…
Barron · this provider
99 MIPS pts
- Ajay Ajmani, MD …
Ajay Ajmani, MD
99 MIPS pts
- Maged Hosny, MD …
Maged Hosny, MD
99 MIPS pts
- Mohammad Shbeeb,…
Mohammad Shbeeb, M.D.
99.1 MIPS pts
- Sabeen Najam, MD…
Sabeen Najam, MD
99.1 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Gregory Barron, 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.
99 ≥ 91st percentile 91% 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 Gregory Barron, MD sits
This provider among rheumatology physician peers
Across the 1,970 rheumatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Gregory Barron, MD writes more Part D claims than 47% of them and scores higher on MIPS quality than 90% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one rheumatology physician peer from a representative sample of 60; the gold marker is Gregory Barron, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Gregory Barron, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Gregory Barron, MD?
High performer (top quartile)Primary specialty
Rheumatology Physician
Medicare Part D claims
1,685 18% vs specialty avg
MIPS final score
99/100 15.5 pts vs avg
Specialty distribution in Colorado
How Rheumatology Physician compares to other specialties among Colorado providers
Medicare quality performance, MIPS
Gregory Barron, MD's 2023 MIPS final score plotted against the Rheumatology Physician national average
- MIPS Final Score
- 99/100
- 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 | 1871859801 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 04/04/2012 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
99.0393
Final Score
Measured-score avg: 83.5
98.2532
Quality
100
Promoting Interoperability
Reporting: Individual
Hospital and facility affiliations
Facilities where Gregory Barron, 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.
Denver Arthritis Clinic PC
Lone Tree, CO
Denver Health And Hospital Authority
Denver, CO
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 Gregory Barron, MD. Source: openpaymentsdata.cms.gov.
Total received
$243
Largest payer
Kiniksa Pharmaceuticals International, plc
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.
1,685
Total Claims
$913K
Total Drug Cost
343
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,601.633
- Total Day Supply
- 105,356
- Generic Drug Cost
- $38K
- Opioid Claims
- 151 (9.0% rate)
Patient Demographics
- Average Patient Age
- 72.1 years
- Avg HCC Risk Score
- 1.49
- Gender Split
- 69% female / 31% male
- Age Distribution
- <65: 29, 65-74: 191, 75-84: 104, 85+: 19
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Gregory Barron, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Prednisone
Prednisone
191 claims
- Methotrexate
Methotrexate
187 claims
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
152 claims
- Duloxetine Hcl
Duloxetine Hcl
105 claims
- Tramadol Hcl
Tramadol Hcl
98 claims
- Allopurinol
Allopurinol
88 claims
- Celecoxib
Celecoxib
83 claims
- Meloxicam 72
Meloxicam
72 claims
| Drug | Claims |
|---|---|
| Prednisone | 191 |
| Methotrexate Methotrexate Sodium | 187 |
| Hydroxychloroquine Sulfate | 152 |
| Duloxetine Hcl | 105 |
| Tramadol Hcl | 98 |
| Allopurinol | 88 |
| Celecoxib | 83 |
| Meloxicam | 72 |
| Alendronate Sodium | 51 |
| Enbrel Sureclick Etanercept | 48 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Gregory Barron, MD fits within the Rheumatology Physician landscape nationally.
6,377
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,058
Avg Claims per Provider
Gregory Barron, MD's 1,685 claims are below the specialty average of 2,058.
Nationwide Rheumatology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Barron, both outside Colorado so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (99 here).
Same NPPES enumeration year (2012)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Rheumatology Physician Providers in Colorado
Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as Barron.
One of 120 Rheumatology Physician providers enrolled in Colorado, 5 are shown here.
Phyllis Acker
RN
Lafayette, CO
Dr. Vivianne Allsop
MD
Denver, CO
Dr. Bjorn Anderson
MD
Denver, CO
Dr. Christopher Antolini
MD
Denver, CO
Dr. Elizabeth Arena
DO, MPH
Grand Junction, CO
Compare Rheumatology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Gregory Barron, MD's specialty? ▼
Gregory Barron, MD specializes in Rheumatology Physician and practices in Denver, Colorado. Credentials: MD.
How much does Gregory Barron, MD prescribe under Medicare Part D? ▼
In 2024, Gregory Barron, MD wrote 1,685 Medicare Part D claims totaling $913K in drug costs for 343 beneficiaries.
What is Gregory Barron, MD's Medicare quality score? ▼
Gregory Barron, MD has a CMS MIPS Final Score of 99/100 (Quality: 98.3). 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 Gregory Barron, MD located? ▼
Gregory Barron, MD is located at 7111 E LOWRY BLVD STE 200, Denver, CO, 80230. Phone: (303) 394-2828.
What is Gregory Barron, MD's NPI number? ▼
Gregory Barron, MD's National Provider Identifier (NPI) is 1871859801, issued on 04/04/2012.
Does Gregory Barron, MD prescribe opioids? ▼
Yes, Gregory Barron, MD had 151 opioid claims in 2024 with an opioid prescribing rate of 9.0%.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,377 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,058 Medicare Part D claims per year.
What drugs does Gregory Barron, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Gregory Barron, MD's most frequently prescribed drugs include Prednisone, Methotrexate, Hydroxychloroquine Sulfate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gregory Barron, MD accept Medicare? ▼
Gregory Barron, MD appears in CMS Medicare data with 1,685 Part D claims and 343 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Barron, MD's credentials? ▼
Gregory Barron, MD's NPI is 1871859801 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.