Mark Hamilton, OD
NPI 1841275369 · Optometrist · Seattle, WA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Hamilton, OD is a Optometrist provider in Seattle, WA (NPI 1841275369).
Provider details
- NPI number
- 1841275369
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- License
- 3374 (WA)
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
58 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 27 | $100 |
| Photography of the Retina92250 | 20 | $41 |
| Established Patient Complete Exam of Visual System92014 | 11 | $142 |
Typical Medicare-allowed amounts for these services range $41–$142 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$112 across 3 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
- 2005-12-07
- Last updated
- 2016-05-27
Frequently asked questions
- What is Mark Hamilton's NPI number?
- Mark Hamilton's National Provider Identifier (NPI) is 1841275369, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Hamilton's specialty?
- Mark Hamilton is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Mark Hamilton located?
- Mark Hamilton's practice location on file with NPPES is 999 3rd Ave, Seattle, WA 98104-4019.
- What is Mark Hamilton's phone number?
- The practice phone number listed in the NPPES registry for Mark Hamilton is (260) 682-2020.
- Does Mark Hamilton accept Medicare?
- Mark Hamilton is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Hamilton's NPI active?
- Yes — Mark Hamilton's NPI (1841275369) is active in the NPPES registry as of the last update on 2016-05-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.