Christine Callahan, MD
NPI 1811910581 · Ophthalmology Physician · Hershey, PA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christine Callahan, MD is a Ophthalmology Physician provider in Hershey, PA (NPI 1811910581).
Provider details
- NPI number
- 1811910581
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- ME87870 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1,084 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 Complete Exam of Visual System92014 | 348 | $71 |
| Established Patient Problem Focused Exam of Visual System92012 | 255 | $47 |
| Imaging of Optic Nerve92133 | 249 | $20 |
| Exam of Visual Field With Extended Testing92083 | 101 | $25 |
| Exam of the Internal Drainage System of Eye92020 | 42 | $19 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 28 | $28 |
| Imaging of Retina92134 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 609 | 163 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 317 | 85 |
| Timolol Maleate | 252 | 85 |
| Prednisolone Acetate | 192 | 104 |
| Brimonidine Tartrate | 121 | 36 |
| Moxifloxacin Hclbrand: Moxifloxacin | 104 | 53 |
| Ketorolac Tromethamine | 101 | 54 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$5,418 across 1 record (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
- 2006-07-25
- Last updated
- 2017-04-07
Frequently asked questions
- What is Christine Callahan's NPI number?
- Christine Callahan's National Provider Identifier (NPI) is 1811910581, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christine Callahan's specialty?
- Christine Callahan is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Christine Callahan located?
- Christine Callahan's practice location on file with NPPES is 500 University Dr, Hershey, PA 17033-2360.
- What is Christine Callahan's phone number?
- The practice phone number listed in the NPPES registry for Christine Callahan is (717) 531-5690.
- Does Christine Callahan accept Medicare?
- Christine Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christine Callahan's NPI active?
- Yes — Christine Callahan's NPI (1811910581) is active in the NPPES registry as of the last update on 2017-04-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.