Lindsay Machen, M.D.
NPI 1649667452 · Ophthalmology Physician · Langhorne, PA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lindsay Machen, M.D. is a Ophthalmology Physician provider in Langhorne, PA (NPI 1649667452).
Provider details
- NPI number
- 1649667452
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- MD466646 (PA)
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
11 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
2,664 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 | 724 | $131 |
| Exam of Visual Field With Extended Testing92083 | 361 | $65 |
| Imaging of Optic Nerve92133 | 316 | $36 |
| Established Patient Complete Exam of Visual System92014 | 204 | $128 |
| Established Patient Problem Focused Exam of Visual System92012 | 166 | $91 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 166 | $93 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 2,976 | 750 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 1,668 | 392 |
| Brimonidine Tartrate | 1,013 | 279 |
| Prednisolone Acetate | 677 | 350 |
| Timolol Maleate | 652 | 211 |
| Dorzolamide Hcl | 273 | 67 |
| Ketorolac Tromethamine | 242 | 139 |
| Moxifloxacin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$582 across 12 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
- 2015-04-20
- Last updated
- 2020-06-05
- Certified
- 2020-06-05
Frequently asked questions
- What is Lindsay Machen's NPI number?
- Lindsay Machen's National Provider Identifier (NPI) is 1649667452, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lindsay Machen's specialty?
- Lindsay Machen is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Lindsay Machen located?
- Lindsay Machen's practice location on file with NPPES is 360 Middletown Blvd Ste 402, Langhorne, PA 19047-1863.
- What is Lindsay Machen's phone number?
- The practice phone number listed in the NPPES registry for Lindsay Machen is (215) 757-6200.
- Does Lindsay Machen accept Medicare?
- Lindsay Machen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lindsay Machen's NPI active?
- Yes — Lindsay Machen's NPI (1649667452) is active in the NPPES registry as of the last update on 2020-06-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.