2026 NPPES data Rheumatology Physician NPI 1871859801 MD
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GREGORY BARRON, MD

Rheumatology Physician in DENVER, Colorado. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
1K
Medicare Part D claims · 295 beneficiaries · Rheumatology Physician avg: 2K
MIPS score
99.0393/100
▲ 16 pts above national avg 83.1 · [object Object]
Industry payments
$242.82
11 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: GREGORY BARRON, MD is a Rheumatology Physician ([object Object]) practicing in DENVER, Colorado with a Medicare Part D prescribing footprint of 1K claims across 295 beneficiaries . Their CMS MIPS Final Score of 99.0393/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities . Industry payments of $242.82 across 11 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: GREGORY BARRON, MD reported a CMS MIPS final score of 99.0393 out of 100, above the 83.1 national average, and filed 1,360 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

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).

GREGORY BARRON, MD at a glance

High performer (top quartile)

NPI registry status

Active

Issued 04/04/2012

NPI 1871859801

Primary specialty

Rheumatology Physician

Mid-sized

6,181 US NPIs in this specialty

Medicare Part D claims

1,360 34% vs specialty avg

2023 prescription claims

Specialty avg: 2,054

MIPS final score

99.0393/100 15.939300000000003% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Colorado

How Rheumatology Physician compares to other specialties among Colorado providers

Colorado providers

Rheumatology Physician share within Colorado

1. Rheumatology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Rheumatology Physician share within Colorado

Medicare quality performance — MIPS

GREGORY BARRON, MD's 2023 MIPS final score plotted against the Rheumatology Physician national average

High performer (top quartile)
MIPS Final Score
99.0393/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Rheumatology Physician) — 99.0393/100 vs national avg 83.1

0%100%National avg83%99%
MIPS final score (Rheumatology Physician) — 99.0393/100 vs national avg 83.1

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).

GREGORY BARRON, MD is a Rheumatology Physician provider practicing in DENVER, Colorado, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1871859801. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

GREGORY BARRON, MD appears in the CMS NPPES registry as a Rheumatology Physician provider holding MD credentials at 7111 E LOWRY BLVD STE 200, DENVER, CO, 80230, with a listed phone of (303) 394-2828. NPI 1871859801 was issued on 04/04/2012. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BARRON most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 1,360 prescription claims written by this provider, covering 295 Medicare beneficiaries and totaling roughly $690K in drug spend, with an opioid prescribing rate of 8.3%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 99.0393/100 for the 2023 performance year (Quality 98.2532), compared with the national average of 83.1.

Rheumatology Physician is a mid-sized specialty nationwide, with 6,181 enrolled providers across 52 states and an average of 2,054 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

7111 E LOWRY BLVD STE 200
DENVER, CO 80230

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
Avg: 83.1
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 2023.

1,360
Total Claims
$690K
Total Drug Cost
295
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,954
Total Day Supply
86,644
Generic Drug Cost
$37K
Opioid Claims
113 (8.3% rate)

Patient Demographics

Average Patient Age
71.8 years
Avg HCC Risk Score
1.31
Gender Split
68% female / 32% male
Age Distribution
<65: 26, 65-74: 161, 75-84: 95, 85+: 13

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Prednisone
143
Methotrexate
Methotrexate Sodium
126
Duloxetine Hcl
124
Hydroxychloroquine Sulfate
106
Allopurinol
88
Celecoxib
77
Meloxicam
75
Tramadol Hcl
68
Enbrel Sureclick
Etanercept
46
Cyclobenzaprine Hcl
45

* 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.

6,181
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider

GREGORY BARRON, MD's 1,360 claims are below the specialty average of 2,054.

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.

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 2023, GREGORY BARRON, MD wrote 1,360 Medicare Part D claims totaling $690K in drug costs for 295 beneficiaries.
What is GREGORY BARRON, MD's Medicare quality score?
GREGORY BARRON, MD has a CMS MIPS Final Score of 99.0393/100 (Quality: 98.2532). The national average MIPS Final Score is 83.1. 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 113 opioid claims in 2023 with an opioid prescribing rate of 8.3%.
How many Rheumatology Physician providers are there in the US?
There are 6,181 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
What drugs does GREGORY BARRON, MD prescribe most often?
Based on 2023 Medicare Part D data, GREGORY BARRON, MD's most frequently prescribed drugs include Prednisone, Methotrexate, Duloxetine Hcl. 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 1,360 Part D claims and 295 Medicare beneficiaries in 2023. 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

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.
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 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