William Greene, M.D.
NPI 1396189791 · Psychiatry Physician · Modesto, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Greene, M.D. is a Psychiatry Physician provider in Modesto, CA (NPI 1396189791).
Provider details
- NPI number
- 1396189791
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD221600 (OR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
472 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) |
|---|---|---|
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 384 | $48 |
| Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221 | 45 | $81 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 43 | $80 |
Typical Medicare-allowed amounts for these services range $48–$81 (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 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 12 | — |
| Olanzapine | 11 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (3)
- 915 Highland BlvdBozeman, MT 59715-6902Phone: (406) 414-5000
- 2801 N Gantenbein AvePortland, OR 97227-1623Phone: (503) 413-8949
- 2211 Ne 139th StVancouver, WA 98686-2742Phone: (503) 413-8949
Registry dates
- Enumerated
- 2013-04-29
- Last updated
- 2025-04-09
- Certified
- 2025-04-09
Frequently asked questions
- What is William Greene's NPI number?
- William Greene's National Provider Identifier (NPI) is 1396189791, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Greene's specialty?
- William Greene is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is William Greene located?
- William Greene's practice location on file with NPPES is 1501 Claus Rd, Modesto, CA 95355-9711.
- What is William Greene's phone number?
- The practice phone number listed in the NPPES registry for William Greene is (209) 579-5628.
- Does William Greene accept Medicare?
- William Greene is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Greene's NPI active?
- Yes — William Greene's NPI (1396189791) is active in the NPPES registry as of the last update on 2025-04-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.