Diane Karalekas, M.D.
NPI 1992742944 · Ophthalmology Physician · Marlborough, MA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diane Karalekas, M.D. is a Ophthalmology Physician provider in Marlborough, MA (NPI 1992742944).
Provider details
- NPI number
- 1992742944
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 81373 (MA)
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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,733 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 Complete Exam of Visual System92014 | 829 | $132 |
| Imaging of Optic Nerve92133 | 405 | $37 |
| Exam of Visual Field With Extended Testing92083 | 332 | $67 |
| Established Patient Problem Focused Exam of Visual System92012 | 312 | $94 |
| Photography of the Retina92250 | 231 | $36 |
| Imaging of Retina92134 | 141 | $42 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 720 | 237 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 205 | 71 |
| Timolol Maleate | 166 | 62 |
| Brimonidine Tartrate | 160 | 63 |
| Dorzolamide Hcl | 81 | 32 |
| Ketorolac Tromethamine | 80 | 78 |
| Brinzolamide | 33 | 13 |
| Bimatoprostbrand: Lumigan |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-31
- Last updated
- 2020-04-21
- Certified
- 2020-04-21
Frequently asked questions
- What is Diane Karalekas's NPI number?
- Diane Karalekas's National Provider Identifier (NPI) is 1992742944, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diane Karalekas's specialty?
- Diane Karalekas is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Diane Karalekas located?
- Diane Karalekas's practice location on file with NPPES is 65 Boston Post Rd W, Marlborough, MA 01752-1872.
- What is Diane Karalekas's phone number?
- The practice phone number listed in the NPPES registry for Diane Karalekas is (508) 481-0815.
- Does Diane Karalekas accept Medicare?
- Diane Karalekas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diane Karalekas's NPI active?
- Yes — Diane Karalekas's NPI (1992742944) is active in the NPPES registry as of the last update on 2020-04-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.