Mark Elkinson, OD PA
NPI 1336233931 · Optometrist · South Portland, ME
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Elkinson, OD PA is a Optometrist provider in South Portland, ME (NPI 1336233931).
Provider details
- NPI number
- 1336233931
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD PA
- Sex
- Male
- Sole proprietor
- Yes
- License
- OPT758 (ME)
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
19 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
384 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 | 119 | $123 |
| Photography of the Retina92250 | 117 | $36 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 60 | $56 |
| Exam of Visual Field With Extended Testing92083 | 50 | $63 |
| Imaging of Retina92134 | 38 | $37 |
Typical Medicare-allowed amounts for these services range $36–$123 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 67 | 20 |
| Tobramycin/Dexamethasonebrand: Tobramycin-Dexamethasone | 27 | 18 |
| Doxycycline Hyclate | 19 | — |
| Brimonidine Tartrate | 17 | — |
| Timolol Maleate | 13 | — |
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
- 2006-10-03
- Last updated
- 2012-11-09
Frequently asked questions
- What is Mark Elkinson's NPI number?
- Mark Elkinson's National Provider Identifier (NPI) is 1336233931, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Elkinson's specialty?
- Mark Elkinson is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Mark Elkinson located?
- Mark Elkinson's practice location on file with NPPES is 200 Gorham Rd, South Portland, ME 04106-2409.
- What is Mark Elkinson's phone number?
- The practice phone number listed in the NPPES registry for Mark Elkinson is (207) 761-9054.
- Does Mark Elkinson accept Medicare?
- Mark Elkinson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Elkinson's NPI active?
- Yes — Mark Elkinson's NPI (1336233931) is active in the NPPES registry as of the last update on 2012-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.