Johnna Walker, PA-C
NPI 1497919401 · Surgical Physician Assistant · San Francisco, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Johnna Walker, PA-C is a Surgical Physician Assistant provider in San Francisco, CA (NPI 1497919401).
Provider details
- NPI number
- 1497919401
- Entity type
- Individual
- Primary specialty
- Surgical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
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
17 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,268 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 | 293 | $93 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 222 | $77 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 202 | $130 |
| X-Ray of Hip, 2-3 Views73502 | 167 | $54 |
| X-Ray of Knee, 3 Views73562 | 114 | $46 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 83 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 196 | 155 |
| Celecoxib | 185 | 137 |
| Amoxicillin | 86 | 74 |
| Tramadol Hcl | 62 | 51 |
| Diclofenac Sodium | 38 | 14 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 36 | 24 |
| Meloxicam | 30 | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$32 across 1 record (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
- 2008-07-18
- Last updated
- 2022-08-11
- Certified
- 2022-08-11
Frequently asked questions
- What is Johnna Walker's NPI number?
- Johnna Walker's National Provider Identifier (NPI) is 1497919401, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Johnna Walker's specialty?
- Johnna Walker is listed in the NPPES registry with a primary specialty of Surgical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Johnna Walker located?
- Johnna Walker's practice location on file with NPPES is 3838 California St Rm 715, San Francisco, CA 94118-1509.
- What is Johnna Walker's phone number?
- The practice phone number listed in the NPPES registry for Johnna Walker is (415) 668-8010.
- Does Johnna Walker accept Medicare?
- Johnna Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Johnna Walker's NPI active?
- Yes — Johnna Walker's NPI (1497919401) is active in the NPPES registry as of the last update on 2022-08-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.