Dr. William Corbin Kritzer , OD
Optometrist • Crystal River, FL
1661 Se Us Highway 19
Crystal River, FL 344294830
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 October 16, 2006; this date does not establish years in practice.
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Published CMS data list 704 Original Medicare Part B services in 2022.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022. Published rows only; this is not a quality measure.
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Published Part B service records, 2022:
- 92250 — Photography of the retina: 291 service units.
- 92014 — Established patient complete exam of visual system: 252 service units.
- 92012 — Established patient problem focused exam of visual system: 94 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2021 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2022). CPT notice
See all 6 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 25 Medicare Part D prescriptions, including refills, in 2020.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020. Published rows only; this is not a quality measure.
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Published Part D records, 2020:
- Neomycin-Polymyxin-Dexameth (Neomycin/Polymyxin B/Dexametha) — 14 prescription fills, including refills.
- Tobramycin — 11 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Medicare Part B services went from 584 in 2018 to 704 in 2022.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2018–2022.
Practice Location & Contact Primary Location
1661 Se Us Highway 19
Crystal River, FL 344294830
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
University Of Houston - College Of Optometry
1987
What Public CMS Data Show
Optometrist: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $50,910 in 2022
The total amount Medicare approved for these services in 2022. 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, 2022.
Paid by Medicare
About $34,600 in 2022
The part of the Medicare-allowed amount that Medicare itself paid in 2022, 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, 2022.
30-day fills
25 standardized 30-day fills in 2020
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
$310 in 2020
The total cost of these prescriptions in 2020, 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, 2020.
Open Payments general payments, program year 2021
All general payments: $173.26 across 4 records.
By nature of payment
- Food and Beverage: $173.26 across 4 records.
Reporting-company totals
- Alcon Vision LLC: $135.98 across 2 records.
- Novartis Pharmaceuticals Corporation: $21.94 across 1 record.
- TISSUETECH, INC.: $15.34 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 2021 (published June 30, 2026).
Years since graduation
39 years (graduated 1987)
CMS Doctors and Clinicians data list 1987 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
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.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
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. Kritzer 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. Kritzer 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 Crystal River and Florida
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Kritzer are from 2022.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Kritzer are from 2020.
3 active clinicians are listed under Optometrist with a practice address in Crystal River, FL (3,595 in Florida).
Addresses are self-reported to NPPES and may be out of date.
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 increased 21% from 584 in 2018 to 704 in 2022.
- 2018: 584
- 2019: 755
- 2020: 614
- 2021: 780
- 2022: 704
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Medicare-allowed amount
Medicare-allowed amount increased 49% from $34,131 in 2018 to $50,910 in 2022.
- 2018: $34,131
- 2019: $46,318
- 2020: $41,365
- 2021: $56,128
- 2022: $50,910
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Paid by Medicare
Paid by Medicare increased 58% from $21,868 in 2018 to $34,600 in 2022.
- 2018: $21,868
- 2019: $31,081
- 2020: $25,804
- 2021: $36,743
- 2022: $34,600
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 14% from 22 in 2018 to 25 in 2020.
- 2018: 22
- 2020: 25
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30-day fills
30-day fills increased 11% from 23 in 2018 to 25 in 2020.
- 2018: 23
- 2020: 25
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Part D drug cost
Part D drug cost decreased 85% from $2,088 in 2018 to $310 in 2020.
- 2018: $2,088
- 2020: $310
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $291.06 in 2019 to $173.26 in 2021.
- 2019: $291.06
- 2020: $124.70
- 2021: $173.26
Sources: CMS Medicare Physician & Other Practitioners (2022), CMS Medicare Part D Prescribers (2020), CMS Open Payments (2021), 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 2021 (payments made January 1 – December 31, 2021): fewer than 11 records totaling $173.26.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Alcon Vision LLC |
Food and Beverage
In-kind items and services
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AcrySof IQ PanOptix | General | $79.35 |
| Alcon Vision LLC |
Food and Beverage
In-kind items and services
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ILUX | General | $56.63 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
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XIIDRA | General | $21.94 |
| TISSUETECH, INC. |
Food and Beverage
In-kind items and services
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PROKERA | General | $15.34 |
Source: CMS Open Payments, program year 2021, 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 2016–2021 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, 2017–2022; 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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92250
Photography of the retina
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291 | 267 | $36.78 | $35.84 |
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92014
Established patient complete exam of visual system
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252 | 235 | $109.74 | $108.65 |
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92012
Established patient problem focused exam of visual system
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94 | 80 | $100.21 | $86.79 |
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92134
Imaging of retina
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25 | 24 | $65.00 | $38.45 |
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92004
New patient complete exam of visual system
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23 | 23 | $124.00 | $122.79 |
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92083
Exam of visual field with extended testing
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19 | 19 | $100.00 | $60.88 |
Source: CMS Part B by Provider and Service, 2022; 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 2020.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Neomycin-Polymyxin-Dexameth | Neomycin/Polymyxin B/Dexametha | 14 | 95 | $235.32 | — |
| Tobramycin | Tobramycin | 11 | 174 | $75.13 | 11 |
Source: CMS Part D by Provider and Drug, 2020; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2026-03-03NUCC 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.
NUCC Taxonomy Code: 152WC0802X
The professional activities performed by an Optometrist related to the fitting of contact lenses to an eye, ongoing evaluation of the cornea's ability to sustain successful contact lens wear, and treatment of any external eye or corneal condition which can affect contact lens wear.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - OPTOMETRY
I20260331001403
FL
7618131582
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 1661 SE US HIGHWAY 19, CRYSTAL RIVER, FL 344294830 (Tel: 3525631666)
Registered at 7400 GALL BLVD, ZEPHYRHILLS, FL 335414371 (Tel: 8137824546)
Registered at 7400 GALL BLVD, ZEPHYRHILLS, FL 335414371 (Tel: 8137824546)
Recorded as WILLIAM KRITZER, OD
Optometrist (license number reported to NPPES: FL OPC6791)
NPI status registered as active in NPPES database
Registered at 321 N ALLEN DR, ALLEN, TX 750132539 (Tel: 9727275717)
Registered at 2816 SHASTA DR, PLANO, TX 750254100 (Tel: 9727275501)
Recorded as WILLIAM KRITZER, O.D.
Optometrist (license number reported to NPPES: TX 3810TG)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Mailing Address
7400 Gall Blvd
Zephyrhills, FL 335414371
Phone: 8137824546