Nathan Walker, PA
NPI 1013790021 · Physician Assistant · Santa Maria, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Walker, PA is a Physician Assistant provider in Santa Maria, CA (NPI 1013790021).
Provider details
- NPI number
- 1013790021
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Male
- Sole proprietor
- Yes
- License
- 63612 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
2 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
772 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 | 322 | $114 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 143 | $81 |
| Assessment of Emotional Or Behavioral Problems96127 | 56 | $5 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 45 | $100 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 38 | $42 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 41 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lorazepam | 234 | 65 |
| Clonazepam | 214 | 58 |
| Quetiapine Fumarate | 148 | 51 |
| Trazodone Hcl | 141 | 55 |
| Sertraline Hcl | 111 | 36 |
| Olanzapine | 100 | 28 |
| Lamotrigine | 98 | 31 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$198 across 8 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
- 2023-08-14
- Last updated
- 2025-06-06
- Certified
- 2025-06-06
Frequently asked questions
- What is Nathan Walker's NPI number?
- Nathan Walker's National Provider Identifier (NPI) is 1013790021, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Walker's specialty?
- Nathan Walker is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Nathan Walker located?
- Nathan Walker's practice location on file with NPPES is 116 S Palisade Dr Ste 200, Santa Maria, CA 93454-8905.
- What is Nathan Walker's phone number?
- The practice phone number listed in the NPPES registry for Nathan Walker is (805) 739-3968.
- Does Nathan Walker accept Medicare?
- Nathan Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Walker's NPI active?
- Yes — Nathan Walker's NPI (1013790021) is active in the NPPES registry as of the last update on 2025-06-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.