NPI registry status
Active
2026 NPPES data Neurology Physician NPI 1649236191 M.D.
Verify on CMS → Simon Oh, M.D.
Neurology 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 19,885 in Neurology 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
3K
Medicare Part D claims · 551 beneficiaries · Neurology Physician avg: 1K
Generic prescribing
65%
generic claims · 34% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
100/100
▲ 17 pts above national avg 83.1 · Exceptional
Industry payments
$7.4K
174 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Simon Oh, M.D. reported a CMS MIPS final score of 100/100 - above the 83.1 national average - and filed 3,158 Medicare Part D claims in 2023.
- 100/100
- MIPS score · +17 vs avg
- 3K
- Part D claims, 2023
- 65%
- 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.
Simon Oh, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
100 Top 7% higher than 93% of 477,587 scored providers
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 Simon Oh, M.D. sits
This provider among neurology physician peers
Across the 5,437 neurology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Simon Oh, M.D. writes more Part D claims than 84% of them and scores higher on MIPS quality than 92% - placing this provider in the high-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
Each dot is one neurology physician peer from a representative sample of 60; the gold marker is Simon Oh, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Simon Oh, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Simon Oh, M.D.?
High performer (top quartile)Primary specialty
Neurology Physician
Medicare Part D claims
3,158 141% vs specialty avg
MIPS final score
100/100 16.9 pts vs avg
Specialty distribution in Colorado
How Neurology Physician compares to other specialties among Colorado providers
Medicare quality performance, MIPS
Simon Oh, M.D.'s 2023 MIPS final score plotted against the Neurology Physician national average
- MIPS Final Score
- 100/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Neurology Physician) - 100/100 vs national avg 83.1
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).
Simon Oh, M.D. appears in the CMS NPPES registry as a Neurology Physician provider holding M.D. credentials at 1444 S. POTOMAC ST, Aurora, CO, 80012, with a listed phone of (303) 481-0030. NPI 1649236191 was issued on 04/25/2006.
Medicare Part D records for calendar year 2023 show 3,158 prescription claims written by this provider, covering 551 Medicare beneficiaries and totaling roughly $6.0 million in drug spend, split 34% brand-name and 65% generic by claim count, with an opioid prescribing rate of 3.4%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 100/100 for the 2023 performance year (Quality 100), compared with the national average of 83.1.
Neurology Physician is a mid-sized specialty nationwide, with 19,885 enrolled providers across 54 states and an average of 1,309 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
Provider Details
| NPI | 1649236191 |
|---|---|
| Specialty | Neurology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 04/25/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
100
Final Score
Avg: 83.1
100
Quality
Reporting: Individual
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 Simon Oh, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$7.4K
Largest payer
LivaNova USA, 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.
Brand vs generic prescribing mix · Above average
Simon Oh, M.D. - brand share 34.0%
Neurology Physician average
34% brand-name claims vs 65% generic, on 3,158 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.
3,158
Total Claims
$6.0M
Total Drug Cost
551
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,516
- Total Day Supply
- 159,292
- Brand vs Generic
- 34% brand / 65% generic
- Brand Drug Cost
- $5.9M
- Generic Drug Cost
- $113K
- Opioid Claims
- 107 (3.4% rate)
Patient Demographics
- Average Patient Age
- 72.5 years
- Avg HCC Risk Score
- 1.73
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 73, 65-74: 227, 75-84: 210, 85+: 41
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Simon Oh, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Gabapentin
Gabapentin
400 claims
- Gamunex-C
Gamunex-C
357 claims
- Pregabalin
Pregabalin
251 claims
- Carbidopa-Levodopa
Carbidopa-Levodopa
163 claims
- Aimovig Autoinjector 143
Aimovig Autoinjector
143 claims
- Sodium Chloride 124
Sodium Chloride
124 claims
- Gammagard Liquid 89
Gammagard Liquid
89 claims
- Propranolol Hcl 73
Propranolol Hcl
73 claims
| Drug | Claims |
|---|---|
| Gabapentin | 400 |
| Gamunex-C Immune Globul G/Gly/Iga Avg 46 | 357 |
| Pregabalin | 251 |
| Carbidopa-Levodopa Carbidopa/Levodopa | 163 |
| Aimovig Autoinjector Erenumab-Aooe | 143 |
| Sodium Chloride 0.9 % Sodium Chloride | 124 |
| Gammagard Liquid Immun Glob G(Igg)/Gly/Iga Ov50 | 89 |
| Propranolol Hcl | 73 |
| Ubrelvy Ubrogepant | 69 |
| Levetiracetam | 65 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Neurology Physician Overview
How Simon Oh, M.D. fits within the Neurology Physician landscape nationally.
19,885
Neurology Physician Providers in US
54
States with Neurology Physician
1,309
Avg Claims per Provider
Simon Oh, M.D.'s 3,158 claims are above the specialty average of 1,309.
Nearby Neurology Physician Providers in Colorado
Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as Oh.
Dr. Elizabeth Ackley
M.D.
Aurora, CO
Dr. Gregory Ales
D.O.
Colorado Springs, CO
Dr. Mihaela Alexander
M.D.
Littleton, CO
Hayder Alhashim
Aurora, CO
Dr. Maysun Ali
D.O.
Englewood, CO
Compare Neurology 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 Neurology 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Colorado
Frequently Asked Questions
What is Simon Oh, M.D.'s specialty? ▼
Simon Oh, M.D. specializes in Neurology Physician and practices in Aurora, Colorado. Credentials: M.D..
How much does Simon Oh, M.D. prescribe under Medicare Part D? ▼
In 2023, Simon Oh, M.D. wrote 3,158 Medicare Part D claims totaling $6.0M in drug costs for 551 beneficiaries.
What is Simon Oh, M.D.'s Medicare quality score? ▼
Simon Oh, M.D. has a CMS MIPS Final Score of 100/100 (Quality: 100). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Simon Oh, M.D. located? ▼
Simon Oh, M.D. is located at 1444 S. POTOMAC ST, Aurora, CO, 80012. Phone: (303) 481-0030.
What is Simon Oh, M.D.'s NPI number? ▼
Simon Oh, M.D.'s National Provider Identifier (NPI) is 1649236191, issued on 04/25/2006.
Does Simon Oh, M.D. prescribe more brand-name or generic drugs? ▼
Simon Oh, M.D.'s prescribing is 34% brand-name and 65% generic drugs by claim count, with $5.9M in brand drug costs.
Does Simon Oh, M.D. prescribe opioids? ▼
Yes, Simon Oh, M.D. had 107 opioid claims in 2023 with an opioid prescribing rate of 3.4%.
How many Neurology Physician providers are there in the US? ▼
There are 19,885 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,309 Medicare Part D claims per year.
What drugs does Simon Oh, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Simon Oh, M.D.'s most frequently prescribed drugs include Gabapentin, Gamunex-C, Pregabalin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Simon Oh, M.D. accept Medicare? ▼
Simon Oh, M.D. appears in CMS Medicare data with 3,158 Part D claims and 551 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Simon Oh, M.D.'s credentials? ▼
Simon Oh, M.D.'s NPI is 1649236191 with credentials M.D.. 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 (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.
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 May 2026.