Karen Frei, M.D.
NPI 1902836141 · Neurology Physician · Loma Linda, CA
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Frei, M.D. is a Neurology Physician provider in Loma Linda, CA (NPI 1902836141).
Provider details
- NPI number
- 1902836141
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- G85492 (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
751 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 274 | $132 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 143 | $94 |
| Electronic Analysis of Implanted Brain, Spinal Cord, Or Peripheral Neurostimulator Generator With Brain Stimulator Programming, First 15 Minutes With Qualified Health Professional95983 | 71 | $50 |
| Electronic Analysis of Implanted Brain, Spinal Cord, Or Peripheral Neurostimulator Generator With Brain Stimulator Programming, Each Additional 15 Minutes With Qualified Health Professional95984 | 63 | $44 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 56 | $169 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 36 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Carbidopa/Levodopabrand: Carbidopa-Levodopa | 477 | 132 |
| Gabapentin | 184 | 53 |
| Primidone | 155 | 40 |
| Levetiracetam | 151 | 45 |
| Propranolol Hcl | 148 | 39 |
| Donepezil Hcl | 108 | 25 |
| Rasagiline Mesylate | 103 | 29 |
| Carbidopa/Levodopabrand: Carbidopa-Levodopa Er |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$411 across 4 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
- 2006-07-04
- Last updated
- 2018-06-26
Frequently asked questions
- What is Karen Frei's NPI number?
- Karen Frei's National Provider Identifier (NPI) is 1902836141, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Frei's specialty?
- Karen Frei is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Frei located?
- Karen Frei's practice location on file with NPPES is 11370 Anderson St # B-100, Loma Linda, CA 92354.
- What is Karen Frei's phone number?
- The practice phone number listed in the NPPES registry for Karen Frei is (909) 588-2880.
- Does Karen Frei accept Medicare?
- Karen Frei is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Frei's NPI active?
- Yes — Karen Frei's NPI (1902836141) is active in the NPPES registry as of the last update on 2018-06-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.