William Zachow, D.O.
NPI 1285949560 · Family Medicine Physician · Anaconda, MT
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Zachow, D.O. is a Family Medicine Physician provider in Anaconda, MT (NPI 1285949560).
Provider details
- NPI number
- 1285949560
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 20A11228 (CA)
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 tenure33% of score
15 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 79 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 204 | 55 |
| Atorvastatin Calcium | 203 | 59 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 191 | 26 |
| Potassium Chloride | 139 | 38 |
| Levothyroxine Sodium | 130 | 34 |
| Amlodipine Besylate | 123 | 38 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$141 across 2 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
- 2010-08-11
- Last updated
- 2014-09-12
Frequently asked questions
- What is William Zachow's NPI number?
- William Zachow's National Provider Identifier (NPI) is 1285949560, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Zachow's specialty?
- William Zachow is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Zachow located?
- William Zachow's practice location on file with NPPES is 1102 E Commercial Ave, Anaconda, MT 59711-2718.
- What is William Zachow's phone number?
- The practice phone number listed in the NPPES registry for William Zachow is (602) 790-4221.
- Does William Zachow accept Medicare?
- William Zachow is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Zachow's NPI active?
- Yes — William Zachow's NPI (1285949560) is active in the NPPES registry as of the last update on 2014-09-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.