Natalia Llanes Aaron, MD
NPI 1811121304 · Neurology Physician · Gaithersburg, MD
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Natalia Llanes Aaron, MD is a Neurology Physician provider in Gaithersburg, MD (NPI 1811121304).
Provider details
- NPI number
- 1811121304
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
15 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 Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 15 | $114 |
Typical Medicare-allowed amounts for these services range $114–$114 (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 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Donepezil Hcl | 245 | 92 |
| Memantine Hcl | 129 | 45 |
| Gabapentin | 121 | 50 |
| Carbidopa/Levodopabrand: Carbidopa-Levodopa | 115 | 47 |
| Levetiracetam | 108 | 40 |
| Fremanezumab-Vfrmbrand: Ajovy Autoinjector | 61 | — |
| Sumatriptan Succinate | 57 | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-05-12
- Last updated
- 2025-05-05
- Certified
- 2025-05-05
Frequently asked questions
- What is Natalia Llanes Aaron's NPI number?
- Natalia Llanes Aaron's National Provider Identifier (NPI) is 1811121304, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Natalia Llanes Aaron's specialty?
- Natalia Llanes Aaron is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Natalia Llanes Aaron located?
- Natalia Llanes Aaron's practice location on file with NPPES is 655 Watkins Mill Rd, Gaithersburg, MD 20879-3301.
- What is Natalia Llanes Aaron's phone number?
- The practice phone number listed in the NPPES registry for Natalia Llanes Aaron is (240) 632-4900.
- Does Natalia Llanes Aaron accept Medicare?
- Natalia Llanes Aaron is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Natalia Llanes Aaron's NPI active?
- Yes — Natalia Llanes Aaron's NPI (1811121304) is active in the NPPES registry as of the last update on 2025-05-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.