Joe Walker, M.D.
NPI 1427070754 · Psychiatry Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joe Walker, M.D. is a Psychiatry Physician provider in San Francisco, CA (NPI 1427070754).
Provider details
- NPI number
- 1427070754
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G46287 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
290 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 146 | $111 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 144 | $82 |
Typical Medicare-allowed amounts for these services range $82–$111 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Dextroamphetamine/Amphetaminebrand: Dextroamphetamine-Amphetamine | 53 |
| Bupropion Hclbrand: Bupropion Xl | 38 |
| Aripiprazole | 37 |
| Clonazepam | 33 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 26 |
| Lorazepam | 25 |
| Trazodone Hcl | 25 |
| Sertraline Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-24
- Last updated
- 2007-07-08
Frequently asked questions
- What is Joe Walker's NPI number?
- Joe Walker's National Provider Identifier (NPI) is 1427070754, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joe Walker's specialty?
- Joe Walker is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Joe Walker located?
- Joe Walker's practice location on file with NPPES is 2340 Clay St, San Francisco, CA 94115-1932.
- What is Joe Walker's phone number?
- The practice phone number listed in the NPPES registry for Joe Walker is (415) 923-3327.
- Does Joe Walker accept Medicare?
- Joe Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joe Walker's NPI active?
- Yes — Joe Walker's NPI (1427070754) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.