2026 NPPES data Hematology & Oncology Physician NPI 1336496785 MD
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Gemlyn George, MD

Hematology & Oncology Physician in Aurora, 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 11,215 in Hematology & Oncology 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
589
Medicare Part D claims · 55 beneficiaries · Hematology & Oncology Physician avg: 847
Generic prescribing
72%
generic claims · 28% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
97.6/100
▲ 14 pts above national avg 83.1 · Exceptional
Industry payments
$383.81
5 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Gemlyn George, MD reported a CMS MIPS final score of 97.6/100 - above the 83.1 national average - and filed 589 Medicare Part D claims in 2023.

97.6/100
MIPS score · +14 vs avg
589
Part D claims, 2023
72%
generic prescribing
Likely
board-certified (heuristic)

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.

Gemlyn George, MD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure

98 Top 15% higher than 85% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90+: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored 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.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Gemlyn George, MD sits

This provider among hematology & oncology physician peers

Across the 4,233 hematology & oncology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Gemlyn George, MD writes more Part D claims than 41% of them and scores higher on MIPS quality than 82% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Part D claim volume vs MIPS quality, by specialty percentile

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100024.148.372.496.6Part D claim volume, percentile in specialtyMIPS quality, percentilePart D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 8Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 63Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 40Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 23Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 60Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 78Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 72Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 25Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 35Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 57Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 47Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 10Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 73Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 2Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 33Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 47Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 90Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 40Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 83Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 37Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 38Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 47Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 70Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 80Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 87Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 15Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 3Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 75Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 53Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 17Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 45Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 28Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 7Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 68Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 53Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 12Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 58Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 12Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 5Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 43Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 85Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 32Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 65Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 62Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 92Gemlyn George, MD-Part D claim volume, percentile in specialty: 41 · MIPS quality, percentile: 82
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one hematology & oncology physician peer from a representative sample of 60; the gold marker is Gemlyn George, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

Board certification likely (heuristic, not verified)

Gemlyn George, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - 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 Gemlyn George, MD?

High performer (top quartile)

NPI registry status

Active

Issued 08/04/2012

NPI 1336496785

Primary specialty

Hematology & Oncology Physician

Mid-sized

11,215 US NPIs in this specialty

Medicare Part D claims

589 30% vs specialty avg

2023 prescription claims

Specialty avg: 847

MIPS final score

97.6/100 14.5 pts vs avg

Exceptional band

vs 83.1 national avg

Specialty distribution in Colorado

How Hematology & Oncology Physician compares to other specialties among Colorado providers

Colorado providers

Largest specialties in Colorado (% of in-state providers)

Behavior Technician - 7.8%Behavior Technician7.8%Mental Health Counselor - 6.2%Mental Health Counselor6.2%Physical Therapist - 4.2%Physical Therapist4.2%Clinical Social Worker - 4.2%Clinical Social Worker4.2%Professional Counselor - 3.7%Professional Counselor3.7%Registered Nurse - 3.6%Registered Nurse3.6%Hematology & Oncology Physician - 0.1%Hematology & Oncology Physician0.1%
Largest specialties in Colorado (% of in-state providers)

Medicare quality performance, MIPS

Gemlyn George, MD's 2023 MIPS final score plotted against the Hematology & Oncology Physician national average

High performer (top quartile)
MIPS Final Score
97.6/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Hematology & Oncology Physician) - 97.6/100 vs national avg 83.1

0%100%National avg83%97.6%
MIPS final score (Hematology & Oncology Physician) - 97.6/100 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).

Gemlyn George, MD appears in the CMS NPPES registry as a Hematology & Oncology Physician provider holding MD credentials at 1665 AURORA CT FL 3, Aurora, CO, 80045, with a listed phone of (720) 848-0000. NPI 1336496785 was issued on 08/04/2012. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what George 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 589 prescription claims written by this provider, covering 55 Medicare beneficiaries and totaling roughly $554K in drug spend, split 28% brand-name and 72% generic by claim count, with an opioid prescribing rate of 61.8%. 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 97.6/100 for the 2023 performance year (Quality 86.5), compared with the national average of 83.1.

Hematology & Oncology Physician is a mid-sized specialty nationwide, with 11,215 enrolled providers across 54 states and an average of 847 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

1665 AURORA CT FL 3
Aurora, CO 80045

Provider Details

NPI 1336496785
Specialty Hematology & Oncology Physician
Credentials MD
Gender Male
NPI Issued 08/04/2012

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

97.5814
Final Score
Avg: 83.1
86.5348
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where Gemlyn George, 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.

University Physicians Incorporated
Aurora, 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 Gemlyn George, MD. Source: openpaymentsdata.cms.gov.

Total received

$384

Largest payer

GENZYME CORPORATION

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 · Above average

Gemlyn George, MD - brand share 28.0%
Hematology & Oncology Physician average

28% brand-name claims vs 72% generic, on 589 2023 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 2023.

589
Total Claims
$554K
Total Drug Cost
55
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
768
Total Day Supply
16,927
Brand vs Generic
28% brand / 72% generic
Brand Drug Cost
$488K
Generic Drug Cost
$66K
Opioid Claims
364 (61.8% rate)

Patient Demographics

Average Patient Age
57.1 years
Avg HCC Risk Score
3.47
Gender Split
62% female / 38% male
Age Distribution
<65: 29, 65-74: 16, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What Gemlyn George, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Oxycodone Hcl
123
Hydromorphone Hcl
60
Oxycontin
Oxycodone Hcl
52
Methadone Hcl
48
Hydroxyurea
36
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
33
Morphine Sulfate Er
Morphine Sulfate
33
Oxbryta
Voxelotor
27
Deferasirox
25
Xarelto
Rivaroxaban
25

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Hematology & Oncology Physician Overview

How Gemlyn George, MD fits within the Hematology & Oncology Physician landscape nationally.

11,215
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
847
Avg Claims per Provider

Gemlyn George, MD's 589 claims are below the specialty average of 847.

Nearby Hematology & Oncology Physician Providers in Colorado

Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as George.

Compare Hematology & Oncology Physician nationally: see state-by-state distribution →

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Colorado medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Hematology & Oncology Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Gemlyn George, MD's specialty?
Gemlyn George, MD specializes in Hematology & Oncology Physician and practices in Aurora, Colorado. Credentials: MD.
How much does Gemlyn George, MD prescribe under Medicare Part D?
In 2023, Gemlyn George, MD wrote 589 Medicare Part D claims totaling $554K in drug costs for 55 beneficiaries.
What is Gemlyn George, MD's Medicare quality score?
Gemlyn George, MD has a CMS MIPS Final Score of 97.6/100 (Quality: 86.5). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Gemlyn George, MD located?
Gemlyn George, MD is located at 1665 AURORA CT FL 3, Aurora, CO, 80045. Phone: (720) 848-0000.
What is Gemlyn George, MD's NPI number?
Gemlyn George, MD's National Provider Identifier (NPI) is 1336496785, issued on 08/04/2012.
Does Gemlyn George, MD prescribe more brand-name or generic drugs?
Gemlyn George, MD's prescribing is 28% brand-name and 72% generic drugs by claim count, with $488K in brand drug costs.
Does Gemlyn George, MD prescribe opioids?
Yes, Gemlyn George, MD had 364 opioid claims in 2023 with an opioid prescribing rate of 61.8%.
How many Hematology & Oncology Physician providers are there in the US?
There are 11,215 Hematology & Oncology Physician providers across 54 states in the US. The average Hematology & Oncology Physician provider writes 847 Medicare Part D claims per year.
What drugs does Gemlyn George, MD prescribe most often?
Based on 2023 Medicare Part D data, Gemlyn George, MD's most frequently prescribed drugs include Oxycodone Hcl, Hydromorphone Hcl, Oxycontin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gemlyn George, MD accept Medicare?
Gemlyn George, MD appears in CMS Medicare data with 589 Part D claims and 55 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gemlyn George, MD's credentials?
Gemlyn George, MD's NPI is 1336496785 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

Compiled from official public sources by the PlainDoctor editorial team.