Marcus Muallem, MD
NPI 1194927335 · Ophthalmology Physician · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marcus Muallem, MD is a Ophthalmology Physician provider in Grand Rapids, MI (NPI 1194927335).
Provider details
- NPI number
- 1194927335
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301090063 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
983 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 199 | $122 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 165 | $38 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 155 | $498 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 120 | $160 |
| Imaging of Retina92134 | 98 | $37 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 1,120 | 642 |
| Moxifloxacin Hclbrand: Moxifloxacin | 941 | 584 |
| Diclofenac Sodium | 873 | 491 |
| Latanoprost | 509 | 166 |
| Timolol Maleate | 309 | 92 |
| Brimonidine Tartrate | 166 | 45 |
| Ketorolac Tromethamine | 130 | 90 |
| Dorzolamide Hcl | 123 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,741 across 35 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-06-01
- Last updated
- 2008-06-09
Frequently asked questions
- What is Marcus Muallem's NPI number?
- Marcus Muallem's National Provider Identifier (NPI) is 1194927335, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcus Muallem's specialty?
- Marcus Muallem is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Marcus Muallem located?
- Marcus Muallem's practice location on file with NPPES is 750 E Beltline Ave Ne, Grand Rapids, MI 49525-6049.
- What is Marcus Muallem's phone number?
- The practice phone number listed in the NPPES registry for Marcus Muallem is (616) 949-2600.
- Does Marcus Muallem accept Medicare?
- Marcus Muallem is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marcus Muallem's NPI active?
- Yes — Marcus Muallem's NPI (1194927335) is active in the NPPES registry as of the last update on 2008-06-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.