Mark Walker, O.D.
NPI 1972731461 · Optometrist · Elkhart, IN
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Walker, O.D. is a Optometrist provider in Elkhart, IN (NPI 1972731461).
Provider details
- NPI number
- 1972731461
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 18003605A (IN)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 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
2,101 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 | 706 | $122 |
| Imaging of Optic Nerve92133 | 365 | $34 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 364 | $86 |
| Imaging of Retina92134 | 232 | $38 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 166 | $16 |
| Photography of the Retina92250 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 313 | 89 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 166 | 50 |
| Timolol Maleate | 99 | 37 |
| Bimatoprostbrand: Lumigan | 87 | 26 |
| Prednisolone Acetate | 71 | 42 |
| Cyclosporinebrand: Restasis | 52 | 28 |
| Loteprednol Etabonate | 46 | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$532 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
- 2009-06-23
- Last updated
- 2012-11-08
Frequently asked questions
- What is Mark Walker's NPI number?
- Mark Walker's National Provider Identifier (NPI) is 1972731461, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Walker's specialty?
- Mark Walker is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Mark Walker located?
- Mark Walker's practice location on file with NPPES is 2746 Old US 20 W, Elkhart, IN 46514-1364.
- What is Mark Walker's phone number?
- The practice phone number listed in the NPPES registry for Mark Walker is (574) 293-3545.
- Does Mark Walker accept Medicare?
- Mark Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Walker's NPI active?
- Yes — Mark Walker's NPI (1972731461) is active in the NPPES registry as of the last update on 2012-11-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.