William Harmon
NPI 1194883314 · Addiction Psychiatry Physician · Santa Cruz, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Harmon is a Addiction Psychiatry Physician provider in Santa Cruz, CA (NPI 1194883314).
Provider details
- NPI number
- 1194883314
- Entity type
- Individual
- Primary specialty
- Addiction Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
- License
- A23325 (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
630 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 | 316 | $58 |
| Psychotherapy With Evaluation and Management Visit, 45 Minutes90836 | 314 | $53 |
Typical Medicare-allowed amounts for these services range $53–$58 (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 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lorazepam | 82 | — |
| Fluoxetine Hcl | 46 | 11 |
| Alprazolam | 40 | 13 |
| Quetiapine Fumarate | 32 | — |
| Lamotrigine | 25 | — |
| Sertraline Hcl | 24 | — |
| Gabapentin | 21 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-04
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Harmon's NPI number?
- William Harmon's National Provider Identifier (NPI) is 1194883314, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Harmon's specialty?
- William Harmon is listed in the NPPES registry with a primary specialty of Addiction Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is William Harmon located?
- William Harmon's practice location on file with NPPES is 3120 Mission Dr, Santa Cruz, CA 95065-1824.
- What is William Harmon's phone number?
- The practice phone number listed in the NPPES registry for William Harmon is (831) 462-0164.
- Does William Harmon accept Medicare?
- William Harmon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Harmon's NPI active?
- Yes — William Harmon's NPI (1194883314) 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.