Dr. Frederick Wayne Knapp , DO
Ophthalmology • Oceanside, CA
2420 Vista Way Ste 101
Oceanside, CA 920546190
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 September 1, 2006; this date does not establish years in practice.
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Published CMS data list 1,092 Original Medicare Part B services in 2020.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Published rows only; this is not a quality measure.
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Published Part B service records, 2020:
- 92014 — Established patient complete exam of visual system: 341 service units.
- 92083 — Exam of visual field with extended testing: 262 service units.
- 92081 — Exam of visual field with limited testing: 161 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2019 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2020). CPT notice
See all 11 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 186 Medicare Part D prescriptions, including refills, in 2021.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2021. Published rows only; this is not a quality measure.
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Published Part D records, 2021:
- Timolol Maleate — 45 prescription fills, including refills.
- Acyclovir — 32 prescription fills, including refills.
- Prednisone — 22 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2021. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 8 records in the table · Guide: How to read Medicare Part D prescriber data
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Medicare Part B services went from 1,410 in 2017 to 1,092 in 2020.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017–2020.
Practice Location & Contact Primary Location
2420 Vista Way Ste 101
Oceanside, CA 920546190
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $192,029 in 2020
The total amount Medicare approved for these services in 2020. 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, 2020.
Paid by Medicare
About $137,685 in 2020
The part of the Medicare-allowed amount that Medicare itself paid in 2020, 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, 2020.
30-day fills
263 standardized 30-day fills in 2021
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$15,777 in 2021
The total cost of these prescriptions in 2021, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2021.
Open Payments general payments, program year 2020
All general payments: $419.76 across 9 records.
By nature of payment
- Food and Beverage: $419.76 across 9 records.
Reporting-company totals (3 largest of 4)
- Bausch Health Americas, Inc.: $144.30 across 4 records.
- Sun Pharmaceutical Industries Inc.: $137.72 across 2 records.
- Sight Sciences, Inc.: $102.38 across 1 record.
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 2020 (published June 30, 2026).
NPI first issued
2006
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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.
Compared with the same specialty in Oceanside and California
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Knapp are from 2020.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Knapp are from 2021.
11 active clinicians are listed under Ophthalmology with a practice address in Oceanside, CA (2,902 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Oceanside
18.2% of these 11 clinicians have the CMS telehealth indicator.
45.5% of these 11 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
Medicare Part B services decreased 23% from 1,410 in 2017 to 1,092 in 2020.
- 2017: 1,410
- 2018: 1,331
- 2019: 1,192
- 2020: 1,092
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Medicare-allowed amount
Medicare-allowed amount decreased 26% from $260,704 in 2017 to $192,029 in 2020.
- 2017: $260,704
- 2018: $251,119
- 2019: $204,481
- 2020: $192,029
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Paid by Medicare
Paid by Medicare decreased 27% from $187,472 in 2017 to $137,685 in 2020.
- 2017: $187,472
- 2018: $179,716
- 2019: $144,086
- 2020: $137,685
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 85% from 1,244 in 2017 to 186 in 2021.
- 2017: 1,244
- 2018: 1,306
- 2019: 989
- 2020: 1,067
- 2021: 186
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30-day fills
30-day fills decreased 83% from 1,546 in 2017 to 263 in 2021.
- 2017: 1,546
- 2018: 1,709
- 2019: 1,366
- 2020: 1,510
- 2021: 263
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Part D drug cost
Part D drug cost decreased 91% from $184,404 in 2017 to $15,777 in 2021.
- 2017: $184,404
- 2018: $238,207
- 2019: $181,289
- 2020: $179,797
- 2021: $15,777
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Industry payments (Open Payments)
Industry payments (Open Payments) decreased 82% from $2,295.27 in 2019 to $419.76 in 2020.
- 2019: $2,295.27
- 2020: $419.76
Sources: CMS Medicare Physician & Other Practitioners (2020), CMS Medicare Part D Prescribers (2021), CMS Open Payments (2020), 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 2020 (payments made January 1 – December 31, 2020): fewer than 11 records totaling $419.76.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Sun Pharmaceutical Industries Inc. |
Food and Beverage
Cash or cash equivalent
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CEQUA | General | $120.00 |
| Bausch Health Americas, Inc. |
Food and Beverage
In-kind items and services
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LOTEMAX | General | $120.00 |
| Sight Sciences, Inc. |
Food and Beverage
In-kind items and services
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OMNI | General | $102.38 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
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XIIDRA | General | $24.00 |
| Bausch Health Americas, Inc. |
Food and Beverage
In-kind items and services
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LOTEMAX SM | General | $18.41 |
| Sun Pharmaceutical Industries Inc. |
Food and Beverage
Cash or cash equivalent
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XELPROS | General | $17.72 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
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XIIDRA | General | $11.36 |
| Bausch Health Americas, Inc. |
Food and Beverage
In-kind items and services
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BESIVANCE | General | $3.00 |
| Bausch Health Americas, Inc. |
Food and Beverage
In-kind items and services
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VYZULTA | General | $2.89 |
Source: CMS Open Payments, program year 2020, 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 2016–2019 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, 2017–2020; 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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341 | 248 | $150.00 | $127.07 |
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92083
Exam of visual field with extended testing
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262 | 256 | $95.00 | $64.50 |
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92081
Exam of visual field with limited testing
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161 | 144 | $60.00 | $34.14 |
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67924
Extensive repair of turning-inward eyelid defect
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77 | 40 | $687.40 | $648.97 |
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65855
Laser repair to improve eye fluid flow
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72 | 67 | $490.00 | $246.33 |
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67825
Removal of eyelashes
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58 | 47 | $150.00 | $133.38 |
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66762
Creation of opening of iris for eye fluid drainage using a laser
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42 | 39 | $590.00 | $476.83 |
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92004
New patient complete exam of visual system
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35 | 35 | $165.86 | $152.15 |
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67917
Extensive repair of turning-outward eyelid defect
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20 | 11 | $690.00 | $623.48 |
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67210
Destruction of growth of retina using a laser
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12 | 12 | $690.00 | $513.06 |
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67961
Removal of up to 1/4 of eyelid margin and repair of eyelid
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12 | 11 | $610.42 | $573.46 |
Source: CMS Part B by Provider and Service, 2020; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2021.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Timolol Maleate | Timolol Maleate | 45 | 2,480 | $501.34 | 19 |
| Acyclovir | Acyclovir | 32 | 1,320 | $1,937.97 | 13 |
| Prednisone | Prednisone | 22 | 720 | $291.00 | — |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 22 | 314 | $171.68 | — |
| Hydroxychloroquine Sulfate | Hydroxychloroquine Sulfate | 20 | 840 | $1,273.90 | — |
| Latanoprost | Latanoprost | 17 | 484 | $214.04 | — |
| Restasis | Cyclosporine | 15 | 510 | $11,096.32 | — |
| Dorzolamide Hcl | Dorzolamide Hcl | 13 | 767 | $291.21 | — |
Source: CMS Part D by Provider and Drug, 2021; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207W00000X
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
Additional State Medicaid & Healthcare Payer Identifiers
Career & Practice History
NPI enumerated September 01, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Ophthalmology Specialists in Oceanside
- Dr. Ann Quan, MD
- Dr. Dana Chan, MD
- Dr. James Davies, MD
- Dr. Peter Krall, MD
- Alexandria Li
- Dr. Robert Pendleton, MD PHD
Mailing Address
2420 Vista Way Ste 101
Oceanside, CA 920546190
Phone: 7607225900