Dr. Michael Thomas Massengill , PhD
Ophthalmology β’ Miami, FL
900 Nw 17th St
Miami, FL 331361119
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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Dr. Michael Massengill is listed in NPPES under Ophthalmology.
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NPI assigned on April 8, 2020; this date does not establish years in practice.
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Published CMS data list 357 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Latanoprost β 106 prescription fills, including refills.
- Brimonidine Tartrate β 69 prescription fills, including refills.
- Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) β 45 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 10 records in the table Β· Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 70% of clinicians listed under Ophthalmology in Miami, FL (2024, 151 clinicians with data). Median for this group: 1,076. Middle half: 220 to 2,550.
Fewer Part D prescriptions than 75% of clinicians listed under Ophthalmology in Florida (2024, 1,099 clinicians with data). Median for this group: 1,203. Middle half: 442 to 2,490.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 580 in 2022 to 357 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2022β2024.
Practice Location & Contact Primary Location
900 Nw 17th St
Miami, FL 331361119
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: University Of Miami. 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 Florida College Of Medicine
2020
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
494 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
$14,311 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 β by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $992.86 across 9 records.
By nature of payment
- Food and Beverage: $992.86 across 9 records.
Reporting-company totals (3 largest of 6)
- Bausch & Lomb Americas Inc.: $249.18 across 2 records.
- Alcon Vision LLC: $244.59 across 2 records.
- ABBVIE INC.: $237.00 across 2 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 2025 (published June 30, 2026).
Years since graduation
6 years (graduated 2020)
CMS Doctors and Clinicians data list 2020 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
2020
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, βDoes your provider accept Medicare as full payment?β
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. Massengill 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. Massengill 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 Miami and Florida
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 70% of clinicians listed under Ophthalmology in Miami, FL (2024, 151 clinicians with data). Median for this group: 1,076. Middle half: 220 to 2,550.
Fewer Part D prescriptions than 75% of clinicians listed under Ophthalmology in Florida (2024, 1,099 clinicians with data). Median for this group: 1,203. Middle half: 442 to 2,490.
Part D drug cost
A lower Part D drug cost than 70% of clinicians listed under Ophthalmology in Miami, FL (2024, 151 clinicians with data). Median for this group: $82,567. Middle half: $7,940 to $309,842.
A lower Part D drug cost than 80% of clinicians listed under Ophthalmology in Florida (2024, 1,099 clinicians with data). Median for this group: $114,958. Middle half: $23,858 to $310,282.
223 active clinicians are listed under Ophthalmology with a practice address in Miami, FL (1,582 in Florida).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Miami
11.2% of these 223 clinicians have the CMS telehealth indicator.
60.1% of these 223 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 D prescriptions
Medicare Part D prescriptions decreased 38% from 580 in 2022 to 357 in 2024.
- 2022: 580
- 2023: 498
- 2024: 357
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30-day fills
30-day fills decreased 47% from 937 in 2022 to 494 in 2024.
- 2022: 937
- 2023: 832
- 2024: 494
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Part D drug cost
Part D drug cost decreased 73% from $53,743 in 2022 to $14,311 in 2024.
- 2022: $53,743
- 2023: $27,449
- 2024: $14,311
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Industry payments (Open Payments)
Industry payments (Open Payments) decreased 30% from $1,417.70 in 2024 to $992.86 in 2025.
- 2024: $1,417.70
- 2025: $992.86
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· 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 2025 (payments made January 1 β December 31, 2025): fewer than 11 records totaling $992.86.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Bausch & Lomb Americas Inc. |
Food and Beverage
In-kind items and services
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MIEBO | General | $143.26 |
| Dutch Ophthalmic, USA |
Food and Beverage
In-kind items and services
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EVA, combined machine | General | $127.54 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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OZURDEX | General | $125.00 |
| Alcon Vision LLC |
Food and Beverage
In-kind items and services
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UNITY | General | $122.44 |
| Alcon Vision LLC |
Food and Beverage
In-kind items and services
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Constellation | General | $122.15 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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OZURDEX | General | $112.00 |
| Bausch & Lomb Americas Inc. |
Food and Beverage
In-kind items and services
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Stellaris | General | $105.92 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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EYLEA HD | General | $68.79 |
| Apellis Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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Syfovre | General | $65.76 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
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 | 106 | 4,097 | $760.71 | 28 |
| Brimonidine Tartrate | Brimonidine Tartrate | 69 | 2,079 | $307.57 | 20 |
| Dorzolamide-Timolol | Dorzolamide Hcl/Timolol Maleat | 45 | 2,676 | $650.06 | 22 |
| Prednisolone Acetate | Prednisolone Acetate | 35 | 1,059 | $1,203.20 | 25 |
| Neomycin-Polymyxin-Dexameth | Neomycin/Polymyxin B/Dexametha | 29 | 570 | $387.19 | 21 |
| Cyclosporine | Cyclosporine | 19 | 570 | $4,845.30 | β |
| Dorzolamide Hcl | Dorzolamide Hcl | 17 | 965 | $105.52 | β |
| Lumigan | Bimatoprost | 14 | 483 | $5,811.58 | β |
| Timolol Maleate | Timolol Maleate | 12 | 625 | $141.34 | β |
| Ketorolac Tromethamine | Ketorolac Tromethamine | 11 | 252 | $98.28 | β |
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
Self-certified to NPPES: 2024-08-05NUCC 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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - OPHTHALMOLOGY
I20240716003024
FL
9931527546
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
University Of Miami
900 Nw 17th St, Miami, FL 331361119
Phone: 3052436857
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.)
Student in an Organized Health Care Education/Training Program
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Ophthalmology (license number reported to NPPES: FL ME166869)
Registered at 900 NW 17TH ST, MIAMI, FL 331361119 (Tel: 3053266000)
Registered at 900 NW 17TH ST, MIAMI, FL 331361134 (Tel: 3053266000)
NPI status registered as active in NPPES database
Registered at 1855 W TAYLOR ST, CHICAGO, IL 606127242 (Tel: 3129967774)
Registered at 1855 W TAYLOR ST, CHICAGO, IL 606127242 (Tel: 3129967774)
Recorded as MICHAEL MASSENGILL, PHD
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Ophthalmology Specialists in Miami
- Dr. Sanja Cypen, MD
- Dr. Anna Junk, MD
- Dr. Prashant Parekh, MD, MBA
- Dr. Alison J Lauter, MD
- Dr. Alcina Lidder, MD
- Dr. Juan Ayala-Haedo, MD
Mailing Address
900 Nw 17th St
Miami, FL 331361134
Phone: 3053266000