NPI registry status
Active
2026 NPPES data Retina Specialist (Ophthalmology) Physician NPI 1609879105 M.D.
Verify on CMS → Stephen Meffert, M.D.
Retina Specialist (Ophthalmology) Physician in Santa Rosa, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 917 in Retina Specialist (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
460
Medicare Part D claims · 124 beneficiaries · Retina Specialist (Ophthalmology) Physician avg: 558
Generic prescribing
56%
generic claims · 44% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
98.3/100
▲ 15 pts above national avg 83.1 · Exceptional
Industry payments
$125.59
2 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
Stephen Meffert, M.D. reported a CMS MIPS final score of 98.3/100 - above the 83.1 national average - and filed 460 Medicare Part D claims in 2023.
- 98.3/100
- MIPS score · +15 vs avg
- 460
- Part D claims, 2023
- 56%
- 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.
Stephen Meffert, 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
98 Top 11% higher than 89% 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 Stephen Meffert, M.D. sits
This provider among retina specialist (ophthalmology) physician peers
Across the 583 retina specialist (ophthalmology) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Stephen Meffert, M.D. writes more Part D claims than 54% of them and scores higher on MIPS quality than 53% - 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 retina specialist (ophthalmology) physician peer from a representative sample of 60; the gold marker is Stephen Meffert, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Stephen Meffert, 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 Stephen Meffert, M.D.?
High performer (top quartile)Primary specialty
Retina Specialist (Ophthalmology) Physician
Medicare Part D claims
460 18% vs specialty avg
MIPS final score
98.3/100 15.2 pts vs avg
Specialty distribution in California
How Retina Specialist (Ophthalmology) Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Stephen Meffert, M.D.'s 2023 MIPS final score plotted against the Retina Specialist (Ophthalmology) Physician national average
- MIPS Final Score
- 98.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Retina Specialist (Ophthalmology) Physician) - 98.3/100 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).
Stephen Meffert, M.D. appears in the CMS NPPES registry as a Retina Specialist (Ophthalmology) Physician provider holding M.D. credentials at 3536 MENDOCINO AVE, Santa Rosa, CA, 95403, with a listed phone of (707) 575-5353. NPI 1609879105 was issued on 05/27/2005.
Medicare Part D records for calendar year 2023 show 460 prescription claims written by this provider, covering 124 Medicare beneficiaries and totaling roughly $28K in drug spend, split 44% brand-name and 56% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 98.3/100 for the 2023 performance year, compared with the national average of 83.1.
Retina Specialist (Ophthalmology) Physician is a narrow specialty nationwide, with 917 enrolled providers across 48 states and an average of 558 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 | 1609879105 |
|---|---|
| Specialty | Retina Specialist (Ophthalmology) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 05/27/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
98.3
Final Score
Avg: 83.1
98
Promoting Interoperability
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 Stephen Meffert, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$126
Largest payer
Alcon Vision LLC
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.
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Stephen Meffert, M.D.. To verify Stephen Meffert, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Stephen Meffert, M.D. - brand share 44.0%
Retina Specialist (Ophthalmology) Physician average
44% brand-name claims vs 56% generic, on 460 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.
460
Total Claims
$28K
Total Drug Cost
124
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 766
- Total Day Supply
- 21,799
- Brand vs Generic
- 44% brand / 56% generic
- Brand Drug Cost
- $20K
- Generic Drug Cost
- $9K
Patient Demographics
- Average Patient Age
- 74.3 years
- Avg HCC Risk Score
- 1.13
- Gender Split
- 51% female / 49% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Stephen Meffert, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisolone Acetate
Prednisolone Acetate
135 claims
- Ketorolac Trometha…
Ketorolac Tromethamine
84 claims
- Atropine Sulfate
Atropine Sulfate
74 claims
- Ofloxacin
Ofloxacin
69 claims
- Difluprednate 24
Difluprednate
24 claims
- Prolensa 21
Prolensa
21 claims
| Drug | Claims |
|---|---|
| Prednisolone Acetate | 135 |
| Ketorolac Tromethamine | 84 |
| Atropine Sulfate | 74 |
| Ofloxacin | 69 |
| Difluprednate | 24 |
| Prolensa Bromfenac Sodium | 21 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Retina Specialist (Ophthalmology) Physician in CA →
All providers in California →
Compare specialties →
Retina Specialist (Ophthalmology) Physician Overview
How Stephen Meffert, M.D. fits within the Retina Specialist (Ophthalmology) Physician landscape nationally.
917
Retina Specialist (Ophthalmology) Physician Providers in US
48
States with Retina Specialist (Ophthalmology) Physician
558
Avg Claims per Provider
Stephen Meffert, M.D.'s 460 claims are below the specialty average of 558.
Nearby Retina Specialist (Ophthalmology) Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Meffert.
Dr. Sean Adrean
M.D.
Fullerton, CA
Dr. Anita Agarwal
MD
San Francisco, CA
Dr. Robert Avery
M.D.
Santa Barbara, CA
Dr. Amr Azzam
MD, PHD
Loma Linda, CA
Dr. Nika Bagheri
M.D.
Simi Valley, CA
Compare Retina Specialist (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 California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Retina Specialist (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 Stephen Meffert, M.D.'s specialty? ▼
Stephen Meffert, M.D. specializes in Retina Specialist (Ophthalmology) Physician and practices in Santa Rosa, California. Credentials: M.D..
How much does Stephen Meffert, M.D. prescribe under Medicare Part D? ▼
In 2023, Stephen Meffert, M.D. wrote 460 Medicare Part D claims totaling $28K in drug costs for 124 beneficiaries.
What is Stephen Meffert, M.D.'s Medicare quality score? ▼
Stephen Meffert, M.D. has a CMS MIPS Final Score of 98.3/100. The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Stephen Meffert, M.D. located? ▼
Stephen Meffert, M.D. is located at 3536 MENDOCINO AVE, Santa Rosa, CA, 95403. Phone: (707) 575-5353.
What is Stephen Meffert, M.D.'s NPI number? ▼
Stephen Meffert, M.D.'s National Provider Identifier (NPI) is 1609879105, issued on 05/27/2005.
Does Stephen Meffert, M.D. prescribe more brand-name or generic drugs? ▼
Stephen Meffert, M.D.'s prescribing is 44% brand-name and 56% generic drugs by claim count, with $20K in brand drug costs.
How many Retina Specialist (Ophthalmology) Physician providers are there in the US? ▼
There are 917 Retina Specialist (Ophthalmology) Physician providers across 48 states in the US. The average Retina Specialist (Ophthalmology) Physician provider writes 558 Medicare Part D claims per year.
What drugs does Stephen Meffert, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Stephen Meffert, M.D.'s most frequently prescribed drugs include Prednisolone Acetate, Ketorolac Tromethamine, Atropine Sulfate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stephen Meffert, M.D. accept Medicare? ▼
Stephen Meffert, M.D. appears in CMS Medicare data with 460 Part D claims and 124 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stephen Meffert, M.D.'s credentials? ▼
Stephen Meffert, M.D.'s NPI is 1609879105 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.