Dr. Samuel Alexander Mainieri , OD
Optometrist • Berkeley, CA
200 Minor Ln
Berkeley, CA 947200001
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on June 16, 2023; this date does not establish years in practice.
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Published CMS data list 31 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 92014 — Established patient complete exam of visual system: 19 service units.
- 92004 — New patient complete exam of visual system: 12 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Fewer Medicare Part B services than 75% of clinicians listed under Optometrist in Berkeley, CA (2024, 37 clinicians with data). Median for this group: 106. Middle half: 31 to 247.
Fewer Medicare Part B services than 80% of clinicians listed under Optometrist in California (2024, 2,094 clinicians with data). Median for this group: 155. Middle half: 52 to 416.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
Practice Location & Contact Primary Location
200 Minor Ln
Berkeley, CA 947200001
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Regents Of The University Of California At Berkeley. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
University Of California - School Of Optometry
2023
What Public CMS Data Show
Optometrist: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
46 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $4,060 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $3,152 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Open Payments general payments, program year 2023
All general payments: $229.66 across 3 records.
By nature of payment
- Food and Beverage: $149.09 across 2 records.
- Travel and Lodging: $80.57 across 1 record.
Reporting-company totals
- Carl Zeiss Meditec, Inc.: $229.66 across 3 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2023 (published June 30, 2026).
Years since graduation
3 years (graduated 2023)
CMS Doctors and Clinicians data list 2023 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2023
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Mainieri has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Mainieri as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Berkeley and California
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 75% of clinicians listed under Optometrist in Berkeley, CA (2024, 37 clinicians with data). Median for this group: 106. Middle half: 31 to 247.
Fewer Medicare Part B services than 80% of clinicians listed under Optometrist in California (2024, 2,094 clinicians with data). Median for this group: 155. Middle half: 52 to 416.
Medicare-allowed amount
A lower Medicare-allowed amount than 70% of clinicians listed under Optometrist in Berkeley, CA (2024, 37 clinicians with data). Median for this group: $11,453. Middle half: $3,812 to $27,899.
A lower Medicare-allowed amount than 80% of clinicians listed under Optometrist in California (2024, 2,094 clinicians with data). Median for this group: $15,581. Middle half: $5,434 to $39,022.
Paid by Medicare
A lower Medicare payment amount than 70% of clinicians listed under Optometrist in Berkeley, CA (2024, 37 clinicians with data). Median for this group: $7,958. Middle half: $2,932 to $21,184.
A lower Medicare payment amount than 75% of clinicians listed under Optometrist in California (2024, 2,094 clinicians with data). Median for this group: $10,496. Middle half: $3,625 to $26,794.
126 active clinicians are listed under Optometrist with a practice address in Berkeley, CA (8,312 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Berkeley
0% of these 126 clinicians have the CMS telehealth indicator.
57.1% of these 126 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
CMS data for Medicare Part B services are available for 2024 only.
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Medicare-allowed amount
CMS data for Medicare-allowed amount are available for 2024 only.
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Paid by Medicare
CMS data for Medicare payment amount are available for 2024 only.
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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2023 only.
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Open Payments (2023), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2023 (payments made January 1 – December 31, 2023): fewer than 11 records totaling $229.66.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Carl Zeiss Meditec, Inc. |
Food and Beverage
In-kind items and services
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— | General | $120.65 |
| Carl Zeiss Meditec, Inc. |
Travel and Lodging
In-kind items and services
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CIRRUS HD-OCT | General | $80.57 |
| Carl Zeiss Meditec, Inc. |
Food and Beverage
In-kind items and services
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CIRRUS HD-OCT | General | $28.44 |
Source: CMS Open Payments, program year 2023, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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92014
Established patient complete exam of visual system
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19 | 19 | $130.05 | $127.98 |
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92004
New patient complete exam of visual system
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12 | 12 | $137.75 | $135.69 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2023-06-16NUCC Taxonomy Code: 152W00000X
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - OPTOMETRY
I20230901003168
CA
6608239934
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Regents Of The University Of California At Berkeley
200 Minor Hall, Berkeley, CA 947202020
Phone: 5106422020
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Optometrist
Doctor of Optometry
Optometrist
Doctor of Optometry
Optometrist
Doctor of Optometry
Optometrist - Corneal and Contact Management
Doctor of Optometry
Optometrist
Doctor of Optometry
Optometrist
Doctor of Optometry
Career & Practice History
NPI enumerated June 16, 2023.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from July 2023 to August 2026.
NPI Administrative Meta
Other Optometrists in Berkeley
- Dr. Lyndsay Stewart, OD
- Dr. Daphne Chan, OD
- Dr. Kathryn Johnson, OD
- Dr. Jasmine Junge, OD
- Dr. Carl Jacobsen, OD
- Dr. Kuniyoshi Kanai, OD
Mailing Address
738 Promontory Ter
San Ramon, CA 945831564
Phone: 6362848248