Christa Walling, O.D.
NPI 1306833421 · Optometrist · Greenfield, IN
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christa Walling, O.D. is a Optometrist provider in Greenfield, IN (NPI 1306833421).
Provider details
- NPI number
- 1306833421
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Female
- License
- 18003127A (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
20 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
1,736 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 | 545 | $112 |
| Photography of the Retina92250 | 426 | $32 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 170 | $79 |
| Exam of Visual Field With Extended Testing92083 | 140 | $54 |
| Imaging of Optic Nerve92133 | 110 | $29 |
| Ultrasound Scan of Cornea to Determine Thickness76514 | 78 | $9 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 181 | 63 |
| Timolol Maleate | 77 | 26 |
| Cyclosporinebrand: Restasis | 55 | 30 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 46 | 18 |
| Lotilanerbrand: Xdemvy | 43 | 40 |
| Travoprost | 40 | 13 |
| Bimatoprostbrand: Lumigan | 21 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$857 across 42 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
- 2005-10-04
- Last updated
- 2007-07-08
Frequently asked questions
- What is Christa Walling's NPI number?
- Christa Walling's National Provider Identifier (NPI) is 1306833421, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christa Walling's specialty?
- Christa Walling is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Christa Walling located?
- Christa Walling's practice location on file with NPPES is 1451 Jason Rd, Greenfield, IN 46140-1039.
- What is Christa Walling's phone number?
- The practice phone number listed in the NPPES registry for Christa Walling is (317) 462-6601.
- Does Christa Walling accept Medicare?
- Christa Walling is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christa Walling's NPI active?
- Yes — Christa Walling's NPI (1306833421) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.