John Stack, PA
NPI 1629170592 · Physician Assistant · Oroville, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Stack, PA is a Physician Assistant provider in Oroville, CA (NPI 1629170592).
Provider details
- NPI number
- 1629170592
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Male
- Sole proprietor
- No
- License
- PA13683 (CA)
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 tenure33% of score
19 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 · 126 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 355 | 98 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 329 | 88 |
| Levothyroxine Sodium | 271 | 60 |
| Lisinopril | 257 | 78 |
| Gabapentin | 221 | 64 |
| Metoprolol Tartrate | 216 | 70 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$862 across 47 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
- 2006-09-02
- Last updated
- 2011-02-11
Frequently asked questions
- What is John Stack's NPI number?
- John Stack's National Provider Identifier (NPI) is 1629170592, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Stack's specialty?
- John Stack is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is John Stack located?
- John Stack's practice location on file with NPPES is 1611 Feather River Blvd, Oroville, CA 98685.
- What is John Stack's phone number?
- The practice phone number listed in the NPPES registry for John Stack is (530) 534-4530.
- Does John Stack accept Medicare?
- John Stack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Stack's NPI active?
- Yes — John Stack's NPI (1629170592) is active in the NPPES registry as of the last update on 2011-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.