NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1366757387 D.O.
Verify on CMS → Michael Chamberlain, D.O.
Ophthalmology Physician in Jenks, 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 22,082 in Ophthalmology 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
597
Medicare Part D claims · 238 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
71%
generic claims · 29% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
83.4/100
▲ 0 pts above national avg 83.1 · Above neutral
Industry payments
$604.77
16 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
Michael Chamberlain, D.O. reported a CMS MIPS final score of 83.4/100 - above the 83.1 national average - and filed 597 Medicare Part D claims in 2023.
- 83.4/100
- MIPS score · +0 vs avg
- 597
- Part D claims, 2023
- 71%
- 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.
Michael Chamberlain, D.O.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
83 42nd percentile higher than 42% 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 Michael Chamberlain, D.O. sits
This provider among ophthalmology physician peers
Across the 9,866 ophthalmology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Michael Chamberlain, D.O. writes more Part D claims than 30% of them and scores higher on MIPS quality than 41% - placing this provider in the lower-volume, lower-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 ophthalmology physician peer from a representative sample of 60; the gold marker is Michael Chamberlain, D.O.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Michael Chamberlain, D.O. 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 Michael Chamberlain, D.O.?
Near national averagePrimary specialty
Ophthalmology Physician
Medicare Part D claims
597 58% vs specialty avg
MIPS final score
83.4/100 0.3 pts vs avg
Specialty distribution in Oklahoma
How Ophthalmology Physician compares to other specialties among Oklahoma providers
Medicare quality performance, MIPS
Michael Chamberlain, D.O.'s 2023 MIPS final score plotted against the Ophthalmology Physician national average
- MIPS Final Score
- 83.4/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Ophthalmology Physician) - 83.4/100 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).
Michael Chamberlain, D.O. appears in the CMS NPPES registry as an Ophthalmology Physician provider holding D.O. credentials at 244 S. GATEWAY PL., Jenks, OK, 74037, with a listed phone of (918) 747-2020. NPI 1366757387 was issued on 08/13/2010.
Medicare Part D records for calendar year 2023 show 597 prescription claims written by this provider, covering 238 Medicare beneficiaries and totaling roughly $23K in drug spend, split 29% brand-name and 71% generic by claim count, with an opioid prescribing rate of 17.1%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 83.4/100 for the 2023 performance year (Quality 100, Cost 44.5), compared with the national average of 83.1.
Ophthalmology Physician is a mid-sized specialty nationwide, with 22,082 enrolled providers across 56 states and an average of 1,420 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 | 1366757387 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 08/13/2010 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
83.3545
Final Score
Avg: 83.1
100
Quality
44.515
Cost
Reporting: Group practice
Hospital and facility affiliations
Facilities where Michael Chamberlain, D.O. 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.
Oklahoma Medical Eye Group
Jenks, 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 Michael Chamberlain, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$605
Largest payer
Amgen 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
Michael Chamberlain, D.O. - brand share 29.0%
Ophthalmology Physician average
29% brand-name claims vs 71% generic, on 597 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.
597
Total Claims
$23K
Total Drug Cost
238
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 614
- Total Day Supply
- 8,271
- Brand vs Generic
- 29% brand / 71% generic
- Brand Drug Cost
- $14K
- Generic Drug Cost
- $9K
- Opioid Claims
- 102 (17.1% rate)
- Antibiotic Claims
- 14
Patient Demographics
- Average Patient Age
- 73.0 years
- Avg HCC Risk Score
- 1.02
- Gender Split
- 61% female / 39% male
- Age Distribution
- <65: 18, 65-74: 123, 75-84: 82, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Michael Chamberlain, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Neomycin-Polymyxin…
Neomycin-Polymyxin-Dexameth
227 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
98 claims
- Triamcinolone Acet… 60
Triamcinolone Acetonide
60 claims
- Prednisolone Acetate 45
Prednisolone Acetate
45 claims
- Erythromycin 43
Erythromycin
43 claims
- Ketorolac Trometha… 34
Ketorolac Tromethamine
34 claims
- Moxifloxacin 31
Moxifloxacin
31 claims
| Drug | Claims |
|---|---|
| Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha | 227 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 98 |
| Triamcinolone Acetonide | 60 |
| Prednisolone Acetate | 45 |
| Erythromycin Erythromycin Base | 43 |
| Ketorolac Tromethamine | 34 |
| Moxifloxacin Moxifloxacin Hcl | 31 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How Michael Chamberlain, D.O. fits within the Ophthalmology Physician landscape nationally.
22,082
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider
Michael Chamberlain, D.O.'s 597 claims are below the specialty average of 1,420.
Nearby Ophthalmology Physician Providers in Oklahoma
Other clinicians with the same primary specialty enrolled in Oklahoma, drawn from the same CMS NPPES roster as Chamberlain.
Dr. Ahmad Abdel-Aty
MD, MHS
Oklahoma City, OK
Ethan Adre
Oklahoma City, OK
Dr. Mary Ahluwalia
D.O.
Tulsa, OK
Dr. Mark Allison
MD
Tulsa, OK
Dr. Manek Anklesaria
MD
Tulsa, OK
Compare Ophthalmology 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 Oklahoma medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Ophthalmology 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.
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Frequently Asked Questions
What is Michael Chamberlain, D.O.'s specialty? ▼
Michael Chamberlain, D.O. specializes in Ophthalmology Physician and practices in Jenks, Oklahoma. Credentials: D.O..
How much does Michael Chamberlain, D.O. prescribe under Medicare Part D? ▼
In 2023, Michael Chamberlain, D.O. wrote 597 Medicare Part D claims totaling $23K in drug costs for 238 beneficiaries.
What is Michael Chamberlain, D.O.'s Medicare quality score? ▼
Michael Chamberlain, D.O. has a CMS MIPS Final Score of 83.4/100 (Quality: 100, Cost: 44.5). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Michael Chamberlain, D.O. located? ▼
Michael Chamberlain, D.O. is located at 244 S. GATEWAY PL., Jenks, OK, 74037. Phone: (918) 747-2020.
What is Michael Chamberlain, D.O.'s NPI number? ▼
Michael Chamberlain, D.O.'s National Provider Identifier (NPI) is 1366757387, issued on 08/13/2010.
Does Michael Chamberlain, D.O. prescribe more brand-name or generic drugs? ▼
Michael Chamberlain, D.O.'s prescribing is 29% brand-name and 71% generic drugs by claim count, with $14K in brand drug costs.
Does Michael Chamberlain, D.O. prescribe opioids? ▼
Yes, Michael Chamberlain, D.O. had 102 opioid claims in 2023 with an opioid prescribing rate of 17.1%.
How many Ophthalmology Physician providers are there in the US? ▼
There are 22,082 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does Michael Chamberlain, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, Michael Chamberlain, D.O.'s most frequently prescribed drugs include Neomycin-Polymyxin-Dexameth, Hydrocodone-Acetaminophen, Triamcinolone Acetonide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Chamberlain, D.O. accept Medicare? ▼
Michael Chamberlain, D.O. appears in CMS Medicare data with 597 Part D claims and 238 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Chamberlain, D.O.'s credentials? ▼
Michael Chamberlain, D.O.'s NPI is 1366757387 with credentials D.O.. 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.