Symeon Missios, M.D.
NPI 1144336538 · Neurological Surgery Physician · West Islip, NY
Enrolled with Medicare as Practitioner - Neurosurgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Symeon Missios, M.D. is a Neurological Surgery Physician provider in West Islip, NY (NPI 1144336538).
Provider details
- NPI number
- 1144336538
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35124092 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
1,805 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 977 | $237 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 216 | $80 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 120 | $104 |
| Ct Scan of Head Or Brain Before and After Contrast70470 | 116 | $66 |
| Ct Scan Head Or Brain Without Contrast70450 | 35 | $44 |
| Mri Scan of Brain Before and After Contrast70553 | 34 | $118 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$524 across 10 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
- 2006-08-21
- Last updated
- 2019-10-17
Frequently asked questions
- What is Symeon Missios's NPI number?
- Symeon Missios's National Provider Identifier (NPI) is 1144336538, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Symeon Missios's specialty?
- Symeon Missios is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Symeon Missios located?
- Symeon Missios's practice location on file with NPPES is 1175 Montauk Hwy Ste 6, West Islip, NY 11795-4939.
- What is Symeon Missios's phone number?
- The practice phone number listed in the NPPES registry for Symeon Missios is (631) 422-5371.
- Does Symeon Missios accept Medicare?
- Symeon Missios is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Symeon Missios's NPI active?
- Yes — Symeon Missios's NPI (1144336538) is active in the NPPES registry as of the last update on 2019-10-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.