Darwin Dalen, O.D.
NPI 1417954553 · Optometrist · Grand Rapids, MN
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Darwin Dalen, O.D. is a Optometrist provider in Grand Rapids, MN (NPI 1417954553).
Provider details
- NPI number
- 1417954553
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 2529 (MN)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
549 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 299 | $124 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 86 | $84 |
| Established Patient Problem Focused Exam of Visual System92012 | 57 | $88 |
| New Patient Complete Exam of Visual System92004 | 41 | $147 |
| Exam of Visual Field With Extended Testing92083 | 33 | $63 |
| Imaging of Optic Nerve92133 | 33 | $33 |
Typical Medicare-allowed amounts for these services range $33–$147 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 128 | 44 |
| Dorzolamide Hcl | 26 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-05
- Last updated
- 2008-04-03
Frequently asked questions
- What is Darwin Dalen's NPI number?
- Darwin Dalen's National Provider Identifier (NPI) is 1417954553, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Darwin Dalen's specialty?
- Darwin Dalen is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Darwin Dalen located?
- Darwin Dalen's practice location on file with NPPES is 201 Nw 4th St, Grand Rapids, MN 55744-2753.
- What is Darwin Dalen's phone number?
- The practice phone number listed in the NPPES registry for Darwin Dalen is (218) 326-9619.
- Does Darwin Dalen accept Medicare?
- Darwin Dalen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Darwin Dalen's NPI active?
- Yes — Darwin Dalen's NPI (1417954553) is active in the NPPES registry as of the last update on 2008-04-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.