Erik Mark Massenzio, BA
Ophthalmology Physician · Philadelphia, PA
Erik Mark Massenzio, BA is an ophthalmology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1093394769, issued on Apr 7, 2021. Check the license (Pennsylvania MD489432, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Erik Mark Massenzio
- Credential
- BA
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- MD489432 PA
Self-reported in NPPES; status is on the state search - Practice location
- 840 Walnut St Ste 1020, Philadelphia, PA 19107
- Phone
- (800) 331-6634
- Enumerated
- Apr 7, 2021
- Record last updated
- Jun 23, 2025
- Medicare enrollment
- Enrolled (PECOS I20250509001982); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 2021
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 1,088 in Pennsylvania → Look up another NPI →
Also registered at 840 Walnut St Ste 1020
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jordan Deaner, MDOphthalmology Physician1407234123
Verify Erik Mark Massenzio in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD489432Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average ophthalmology physician in 2024
460 Medicare Part D claims for 174 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 32% of claims.
Most prescribed
- Erythromycin73 claims
- Prednisolone Acetate68 claims
- Dorzolamide-Timolol49 claims
- Ofloxacin42 claims
- Ketorolac Tromethamine36 claims
- Latanoprost33 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,024.30
14 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Retinovitreous Associates LtdPhiladelphia, PA
- Wills Eye Ophthalmology Clinic, IncPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Erik Mark Massenzio among 1,088 ophthalmology physician records in Pennsylvania
Erik Mark Massenzio, BA is one of 1,088 ophthalmology physician records with a practice address in Pennsylvania. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 94% of them.
- NPI issued2021 · 94% of these records are older, 4% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2021 · median 2000 among the 734 with a school on file
- Record last updated2025 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Pennsylvania
There are 1,088 ophthalmology physician records in Pennsylvania.
All 1,088 in Pennsylvania → Every provider in Philadelphia → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Yelena Doych, MDPhiladelphia, PA 191071669419545
- Alan Forman, M.D.Philadelphia, PA 191071174524771
- Janice Gault, MDPhiladelphia, PA 191071780673137
- Kammi GuntonPhiladelphia, PA 191071750383600
- Julia Haller, M.D.Philadelphia, PA 191071871542514
- Daniel Kane, MDPhiladelphia, PA 191071700847282
- Lawrence Kenney, M.D.Philadelphia, PA 191071972582633
- Peter Laibson, MDPhiladelphia, PA 191071194723841
Common questions
What is Erik Mark Massenzio, BA's NPI number?
Erik Mark Massenzio, BA's National Provider Identifier (NPI) is 1093394769, issued on Apr 7, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Erik Mark Massenzio, BA located?
The NPPES record lists a practice address at 840 Walnut St Ste 1020, Philadelphia, PA, 19107. Phone: (800) 331-6634. Providers update this record themselves, so call before visiting.
How can I verify Erik Mark Massenzio, BA's license?
NPPES lists Pennsylvania license number MD489432, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Erik Mark Massenzio, BA prescribe under Medicare Part D?
In 2024, Erik Mark Massenzio, BA had 460 Medicare Part D claims for 174 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.