John Mackovjak, M.D.
NPI 1386932945 · Ophthalmology Physician · Mt Pleasant, MI
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Mackovjak, M.D. is a Ophthalmology Physician provider in Mt Pleasant, MI (NPI 1386932945).
Provider details
- NPI number
- 1386932945
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4301099081 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
6 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
2,567 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 478 | $86 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 470 | $372 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 424 | $38 |
| Established Patient Complete Exam of Visual System92014 | 185 | $116 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 170 | $159 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 1,332 | 876 |
| Ketorolac Tromethamine | 1,162 | 725 |
| Ofloxacin | 880 | 660 |
| Latanoprost | 588 | 180 |
| Timolol Maleate | 200 | 67 |
| Brimonidine Tartrate | 191 | 55 |
| Bimatoprostbrand: Lumigan | 140 | 42 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol |
Practice location
Mailing address
Additional practice locations (5)
- 3600 Capital Ave Sw Ste 203Battle Creek, MI 49015-9393Phone: (269) 979-6383Fax: (269) 979-6381
- 2001 Coolidge RdEast Lansing, MI 48823-1378Phone: (517) 337-1668Fax: (517) 337-1779
- 1005 Charlevoix Dr Ste 200Grand Ledge, MI 48837-8186Phone: (517) 627-3030Fax: (517) 627-8088
- 2790 W Grand River Ave Ste 200Howell, MI 48843-8424Phone: (517) 548-3571Fax: (517) 545-2543
- 5100 Marsh Rd Ste HOkemos, MI 48864-1195Phone: (517) 349-0150Fax: (517) 349-0157
Registry dates
- Enumerated
- 2011-07-18
- Last updated
- 2023-08-16
- Certified
- 2023-08-16
Frequently asked questions
- What is John Mackovjak's NPI number?
- John Mackovjak's National Provider Identifier (NPI) is 1386932945, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Mackovjak's specialty?
- John Mackovjak is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is John Mackovjak located?
- John Mackovjak's practice location on file with NPPES is 1535 E Broomfield St, Mt Pleasant, MI 48858-4489.
- What is John Mackovjak's phone number?
- The practice phone number listed in the NPPES registry for John Mackovjak is (989) 772-3339.
- Does John Mackovjak accept Medicare?
- John Mackovjak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Mackovjak's NPI active?
- Yes — John Mackovjak's NPI (1386932945) is active in the NPPES registry as of the last update on 2023-08-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.