Dr. John T Knapp , MD
Ophthalmology โข Saint Paul, MN
2500 Como Ave
Saint Paul, MN 55108
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 April 9, 2007; this date does not establish years in practice.
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Published CMS data list 573 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 92134 โ Imaging of retina: 76 service units.
- 92014 โ Established patient complete exam of visual system: 68 service units.
- 92136 โ Measurement of corneal curvature and depth of eye: 66 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 13 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 854 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Latanoprost โ 312 prescription fills, including refills.
- Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) โ 136 prescription fills, including refills.
- Timolol Maleate โ 108 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 15 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 60% of clinicians listed under Ophthalmology in Saint Paul, MN (2024, 11 clinicians with data). Median for this group: 561. Middle half: 242 to 2,191.
Fewer Medicare Part B services than 65% of clinicians listed under Ophthalmology in Minnesota (2024, 252 clinicians with data). Median for this group: 1,102. Middle half: 457 to 1,797.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 974 in 2020 to 573 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
2500 Como Ave
Saint Paul, MN 55108
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in St. Paul, MN. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Group Health Plan Inc. 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 Minnesota Medical School
2006
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
199 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 โ by Provider, 2024.
Medicare-allowed amount
About $66,420 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 โ by Provider and Service, 2024.
Paid by Medicare
About $47,316 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 โ by Provider and Service, 2024.
30-day fills
1,825 standardized 30-day fills in 2024
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
$61,278 in 2024
The total cost of these prescriptions in 2024, 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 โ by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019โ2025.
Years since graduation
20 years (graduated 2006)
CMS Doctors and Clinicians data list 2006 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
2007
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, โDoes your provider accept Medicare as full payment?โ
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. Knapp 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. Knapp 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 Saint Paul and Minnesota
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 60% of clinicians listed under Ophthalmology in Saint Paul, MN (2024, 11 clinicians with data). Median for this group: 561. Middle half: 242 to 2,191.
Fewer Medicare Part B services than 65% of clinicians listed under Ophthalmology in Minnesota (2024, 252 clinicians with data). Median for this group: 1,102. Middle half: 457 to 1,797.
Medicare-allowed amount
Close to the middle for clinicians listed under Ophthalmology in Saint Paul, MN (2024, 11 clinicians with data). Median for this group: $66,420. Middle half: $18,569 to $168,207.
A lower Medicare-allowed amount than 70% of clinicians listed under Ophthalmology in Minnesota (2024, 252 clinicians with data). Median for this group: $132,426. Middle half: $55,265 to $226,147.
Paid by Medicare
A higher Medicare payment amount than 60% of clinicians listed under Ophthalmology in Saint Paul, MN (2024, 11 clinicians with data). Median for this group: $46,590. Middle half: $13,851 to $118,273.
A lower Medicare payment amount than 70% of clinicians listed under Ophthalmology in Minnesota (2024, 252 clinicians with data). Median for this group: $95,219. Middle half: $34,256 to $160,946.
Medicare Part D prescriptions
More Part D prescriptions than 80% of clinicians listed under Ophthalmology in Saint Paul, MN (2024, 11 clinicians with data). Median for this group: 456. Middle half: 286 to 707.
Close to the middle for clinicians listed under Ophthalmology in Minnesota (2024, 274 clinicians with data). Median for this group: 917. Middle half: 326 to 1,879.
Part D drug cost
A higher Part D drug cost than 90% of clinicians listed under Ophthalmology in Saint Paul, MN (2024, 11 clinicians with data). Median for this group: $22,722. Middle half: $14,177 to $47,696.
Close to the middle for clinicians listed under Ophthalmology in Minnesota (2024, 274 clinicians with data). Median for this group: $45,837. Middle half: $11,257 to $132,065.
15 active clinicians are listed under Ophthalmology with a practice address in Saint Paul, MN (434 in Minnesota).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Saint Paul
0% of these 15 clinicians have the CMS telehealth indicator.
66.7% of these 15 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 41% from 974 in 2020 to 573 in 2024.
- 2020: 974
- 2021: 736
- 2022: 669
- 2023: 658
- 2024: 573
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Medicare-allowed amount
Medicare-allowed amount decreased 49% from $130,932 in 2020 to $66,420 in 2024.
- 2020: $130,932
- 2021: $95,177
- 2022: $81,685
- 2023: $80,024
- 2024: $66,420
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Paid by Medicare
Paid by Medicare decreased 50% from $93,885 in 2020 to $47,316 in 2024.
- 2020: $93,885
- 2021: $67,232
- 2022: $57,436
- 2023: $56,153
- 2024: $47,316
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Medicare Part D prescriptions
Medicare Part D prescriptions varied from year to year: 782 in 2020 and 854 in 2024.
- 2020: 782
- 2021: 1,122
- 2022: 1,100
- 2023: 1,049
- 2024: 854
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30-day fills
30-day fills increased 33% from 1,376 in 2020 to 1,825 in 2024.
- 2020: 1,376
- 2021: 2,104
- 2022: 2,134
- 2023: 2,181
- 2024: 1,825
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Part D drug cost
Part D drug cost decreased 13% from $70,489 in 2020 to $61,278 in 2024.
- 2020: $70,489
- 2021: $110,783
- 2022: $111,843
- 2023: $108,340
- 2024: $61,278
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 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 โ by Provider and Service data, 2017โ2024; 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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92134
Imaging of retina
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76 | 72 | $188.00 | $38.49 |
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92014
Established patient complete exam of visual system
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68 | 68 | $473.00 | $122.75 |
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92136
Measurement of corneal curvature and depth of eye
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66 | 46 | $187.27 | $39.29 |
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92133
Imaging of optic nerve
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64 | 58 | $171.00 | $34.16 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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57 | 52 | $478.00 | $124.36 |
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66984
Removal of cataract with insertion of prosthetic lens
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51 | 29 | $2510.00 | $521.35 |
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92083
Exam of visual field with extended testing
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48 | 46 | $292.00 | $62.89 |
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G2211
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
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35 | 31 | $62.00 | $15.71 |
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99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
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30 | 28 | $669.00 | $174.00 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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27 | 26 | $338.00 | $85.19 |
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92004
New patient complete exam of visual system
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18 | 18 | $559.00 | $146.74 |
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G2212
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or
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18 | 14 | $120.00 | $30.77 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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15 | 15 | $622.00 | $160.50 |
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.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Latanoprost | Latanoprost | 312 | 20,130 | $4,914.65 | 94 |
| Dorzolamide-Timolol | Dorzolamide Hcl/Timolol Maleat | 136 | 9,578 | $3,278.97 | 39 |
| Timolol Maleate | Timolol Maleate | 108 | 8,263 | $1,398.36 | 40 |
| Lumigan | Bimatoprost | 45 | 2,729 | $23,990.36 | 11 |
| Prednisolone Acetate | Prednisolone Acetate | 45 | 1,532 | $1,529.97 | 26 |
| Brimonidine Tartrate | Brimonidine Tartrate | 44 | 2,530 | $3,072.88 | 16 |
| Dorzolamide Hcl | Dorzolamide Hcl | 29 | 2,775 | $587.36 | โ |
| Brimonidine Tartrate-Timolol | Brimonidine Tartrate/Timolol | 25 | 1,375 | $5,730.17 | โ |
| Travoprost | Travoprost | 22 | 1,137 | $3,758.48 | โ |
| Simbrinza | Brinzolamide/Brimonidine Tart | 18 | 1,106 | $5,870.62 | โ |
| Bromfenac Sodium | Bromfenac Sodium | 16 | 584 | $4,089.02 | โ |
| Ketorolac Tromethamine | Ketorolac Tromethamine | 15 | 673 | $348.51 | โ |
| Erythromycin | Erythromycin Base | 13 | 232 | $225.96 | โ |
| Dorzolamide-Timolol | Dorzolamide/Timolol/Pf | 13 | 370 | $1,034.60 | โ |
| Tafluprost | Tafluprost/Pf | 13 | 390 | $1,447.60 | โ |
Source: CMS Part D by Provider and Drug, 2024; 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
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - OPHTHALMOLOGY
I20070817000048
MN
4981796174
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
Group Health Plan Inc
401 Phalen Blvd, Saint Paul, MN 551305302
Phone: 6512547400
Secondary Practice Locations
401 Phalen Blvd - Ms 41102e, Healthpartners Specialty Center 401
St. Paul, MN 551305302
Phone: 6512547500
401 Phalen Blvd - Ms 41102e, Healthpartners Specialty Center 401
St. Paul, MN 551305302
Phone: 6512547500
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Family Medicine - Sports Medicine
Doctor of Medicine (M.D.)
Preventive Medicine - Occupational Medicine
Doctor of Medicine (M.D.)
Dentist - General Practice
Doctor of Dental Surgery
Dentist - Orofacial Pain
Doctor of Dental Surgery, Master of Science
Family Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 2500 COMO AVE, SAINT PAUL, MN 55108 (Tel: 6516416200)
NPI status registered as active in NPPES database
Registered at 401 PHALEN BLVD - MS 41102E, HEALTHPARTNERS SPECIALTY CENTER 401, ST. PAUL, MN 551305302 (Tel: 6512547500)
Registered at 8170 33RD AVE S, MS21110Q, MINNEAPOLIS, MN 554254516 (Tel: 9528835375)
Recorded as JOHN KNAPP, MD
Ophthalmology (license number reported to NPPES: MN 49774)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Ophthalmology Specialists in Saint Paul
- Dr. Gene Chen, MD
- Dr. Esther Nwankwo, MD
- Dr. John Zeyer, MD
- Dr. Mark Wedul, MD
- Dr. Matthew Cossack, MD
- Dr. David Eilers, MD
Mailing Address
8170 33rd Ave S, Ms21110q
Minneapolis, MN 554254516
Phone: 6516416200