Phillip Ahn, M.D.
NPI 1104921832 · Neurology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Phillip Ahn, M.D. is a Neurology Physician provider in Los Angeles, CA (NPI 1104921832).
Provider details
- NPI number
- 1104921832
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A52241 (CA)
Specialties & taxonomies
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
2,583 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 | 1,203 | $105 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 311 | $104 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 185 | $190 |
| Needle Measurement of Electrical Activity in Arm Or Leg Muscles, Complete Study95886 | 173 | $114 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 92 | $147 |
| Measurement of Brain Wave Activity (eeg), Awake and Drowsy |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 51 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Donepezil Hcl | 1,001 | 249 |
| Gabapentin | 902 | 276 |
| Carbidopa/Levodopabrand: Carbidopa-Levodopa | 394 | 100 |
| Memantine Hcl | 345 | 93 |
| Primidone | 270 | 60 |
| Memantine Hclbrand: Memantine Hcl Er | 244 | 45 |
| Levetiracetam | 225 | 51 |
| Sertraline Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,119 across 42 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
- 2006-09-14
- Last updated
- 2013-07-24
Frequently asked questions
- What is Phillip Ahn's NPI number?
- Phillip Ahn's National Provider Identifier (NPI) is 1104921832, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Phillip Ahn's specialty?
- Phillip Ahn is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Phillip Ahn located?
- Phillip Ahn's practice location on file with NPPES is 520 S Virgil Ave., Los Angeles, CA 90020-1425.
- What is Phillip Ahn's phone number?
- The practice phone number listed in the NPPES registry for Phillip Ahn is (213) 251-3333.
- Does Phillip Ahn accept Medicare?
- Phillip Ahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Phillip Ahn's NPI active?
- Yes — Phillip Ahn's NPI (1104921832) is active in the NPPES registry as of the last update on 2013-07-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.