Dr. Patrick Michael Monahan , MD
Specialist • Campbell, CA
3803 S Bascom Ave, Ste 104
Campbell, CA 950087317
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 11, 2005; this date does not establish years in practice.
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Published CMS data list 9,042 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:
- 92134 — Imaging of retina: 2,504 service units.
- J2778 — Injection, ranibizumab, 0.1 mg: 1,698 service units.
- 92014 — Established patient complete exam of visual system: 1,259 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 16 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 84 Medicare Part D prescriptions, including refills, in 2022.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2022. Published rows only; this is not a quality measure.
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Published Part D records, 2022:
- Tobramycin-Dexamethasone (Tobramycin/Dexamethasone) — 53 prescription fills, including refills.
- Prednisolone Acetate — 31 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2022. 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 8,694 in 2018 to 9,042 in 2022.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2018–2022.
Practice Location & Contact Primary Location
3803 S Bascom Ave
Ste 104
Campbell, CA 950087317
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
Specialist: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $1,884,008 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 $1,460,280 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
109 standardized 30-day fills in 2022
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
$5,872 in 2022
The total cost of these prescriptions in 2022, 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, 2022.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $24.48 in 2022
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2022.
NPI first issued
2005
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 Campbell and California
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Monahan are from 2022.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Monahan are from 2022.
11 active clinicians are listed under Specialist with a practice address in Campbell, CA (5,756 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Campbell
9.1% of these 11 clinicians have the CMS telehealth indicator.
27.3% 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 stayed about the same: 8,694 in 2018 and 9,042 in 2022.
- 2018: 8,694
- 2019: 8,818
- 2020: 7,635
- 2021: 8,960
- 2022: 9,042
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Medicare-allowed amount
Medicare-allowed amount increased 41% from $1,334,143 in 2018 to $1,884,008 in 2022.
- 2018: $1,334,143
- 2019: $1,418,600
- 2020: $1,504,843
- 2021: $1,916,591
- 2022: $1,884,008
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Paid by Medicare
Paid by Medicare increased 42% from $1,030,237 in 2018 to $1,460,280 in 2022.
- 2018: $1,030,237
- 2019: $1,097,336
- 2020: $1,173,047
- 2021: $1,511,533
- 2022: $1,460,280
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 44% from 151 in 2018 to 84 in 2022.
- 2018: 151
- 2019: 141
- 2020: 75
- 2021: 84
- 2022: 84
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30-day fills
30-day fills decreased 48% from 209 in 2018 to 109 in 2022.
- 2018: 209
- 2019: 203
- 2020: 108
- 2021: 118
- 2022: 109
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Part D drug cost
Part D drug cost decreased 47% from $11,091 in 2018 to $5,872 in 2022.
- 2018: $11,091
- 2019: $13,911
- 2020: $5,576
- 2021: $5,692
- 2022: $5,872
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $52.58 in 2019 to $24.48 in 2022.
- 2019: $52.58
- 2020: $59.46
- 2022: $24.48
Sources: CMS Medicare Physician & Other Practitioners (2022), CMS Medicare Part D Prescribers (2022), CMS Open Payments (2022), 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 2022 (payments made January 1 – December 31, 2022): fewer than 11 records totaling $24.48.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Genentech, Inc. |
Food and Beverage
In-kind items and services
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VABYSMO | General | $24.48 |
Source: CMS Open Payments, program year 2022, 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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92134
Imaging of retina
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2,504 | 996 | $281.00 | $48.63 |
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J2778
Injection, ranibizumab, 0.1 mg
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1,698 | 97 | $700.00 | $278.54 |
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92014
Established patient complete exam of visual system
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1,259 | 773 | $243.00 | $152.04 |
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92012
Established patient problem focused exam of visual system
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1,045 | 318 | $173.00 | $107.76 |
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67028
Injection of drug into eye
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934 | 247 | $733.91 | $133.13 |
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J0178
Injection, aflibercept, 1 mg
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792 | 102 | $2000.00 | $897.74 |
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92004
New patient complete exam of visual system
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163 | 163 | $287.00 | $178.95 |
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76512
2d ultrasound scan of eye tissue and structures
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158 | 102 | $265.00 | $56.19 |
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J7999
Compounded drug, not otherwise classified
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145 | 55 | $160.00 | $93.10 |
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92250
Photography of the retina
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103 | 102 | $428.00 | $41.15 |
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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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100 | 100 | $302.00 | $191.04 |
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92235
Exam of retinal blood vessels using a special camera after injection of a dye
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43 | 43 | $481.00 | $157.51 |
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67228
Destruction of leaking blood vessels of retina using laser
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33 | 11 | $2585.00 | $407.84 |
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67036
Removal of eye fluid (vitreous) between lens and retina
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30 | 26 | $4388.00 | $1063.82 |
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67145
Photocoagulation treatment to prevent detachment of retina
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23 | 21 | $1550.00 | $272.22 |
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67041
Removal of membrane of retina
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12 | 12 | $7454.00 | $1383.39 |
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 2022.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Tobramycin-Dexamethasone | Tobramycin/Dexamethasone | 53 | 1,348 | $3,908.93 | 44 |
| Prednisolone Acetate | Prednisolone Acetate | 31 | 1,630 | $1,963.41 | 18 |
Source: CMS Part D by Provider and Drug, 2022; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 174400000X
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
Additional State Medicaid & Healthcare Payer Identifiers
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated October 11, 2005.
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 Specialists in Campbell
- Dr. Khalil Fattahi, MD
- Dr. R. Laurence Berkowitz, MD
- Dr. Polyxene Kokinos, MD
- Dr. Felicia Radu-Radulescu, MD
Mailing Address
3395 S Bascom Ave Ste 140
Campbell, CA 950086770
Phone: 4085590666