Karen Nunez-Wallace, MD
NPI 1811121197 · Neurology Physician · Huntington Beach, CA
Enrolled with Medicare as Practitioner - Neurosurgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Nunez-Wallace, MD is a Neurology Physician provider in Huntington Beach, CA (NPI 1811121197).
Provider details
- NPI number
- 1811121197
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- BP10034902 (TX)
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
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
102 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 | 39 | $98 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 19 | $98 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 15 | $139 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 15 | $194 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 14 | $121 |
Typical Medicare-allowed amounts for these services range $98–$194 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Memantine Hcl | 288 | 77 |
| Donepezil Hcl | 210 | 75 |
| Levetiracetam | 166 | 43 |
| Gabapentin | 136 | 55 |
| Carbidopa/Levodopabrand: Carbidopa-Levodopa | 120 | 38 |
| Quetiapine Fumarate | 94 | 28 |
| Amitriptyline Hcl | 91 | 27 |
| Pregabalin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$227 across 2 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
Additional practice locations (1)
- 1 Baylor PlzBaylor College of Medicine - Department of NeurologyHouston, TX 77030-3411Phone: (713) 798-6151
Registry dates
- Enumerated
- 2009-05-14
- Last updated
- 2026-01-04
- Certified
- 2026-01-04
Frequently asked questions
- What is Karen Nunez-Wallace's NPI number?
- Karen Nunez-Wallace's National Provider Identifier (NPI) is 1811121197, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Nunez-Wallace's specialty?
- Karen Nunez-Wallace is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Nunez-Wallace located?
- Karen Nunez-Wallace's practice location on file with NPPES is 19066 Magnolia St, Huntington Beach, CA 92646-2232.
- What is Karen Nunez-Wallace's phone number?
- The practice phone number listed in the NPPES registry for Karen Nunez-Wallace is (714) 968-0068.
- Does Karen Nunez-Wallace accept Medicare?
- Karen Nunez-Wallace is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Nunez-Wallace's NPI active?
- Yes — Karen Nunez-Wallace's NPI (1811121197) is active in the NPPES registry as of the last update on 2026-01-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.