Chad Ryersee, DO
NPI 1639939796 · Student in an Organized Health Care Education/Training Program · Billings, MT
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chad Ryersee, DO is a Student in an Organized Health Care Education/Training Program provider in Billings, MT (NPI 1639939796).
Provider details
- NPI number
- 1639939796
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
2 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Atorvastatin Calcium | 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
Registry dates
- Enumerated
- 2024-03-19
- Last updated
- 2024-03-19
- Certified
- 2024-03-19
Frequently asked questions
- What is Chad Ryersee's NPI number?
- Chad Ryersee's National Provider Identifier (NPI) is 1639939796, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chad Ryersee's specialty?
- Chad Ryersee is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Chad Ryersee located?
- Chad Ryersee's practice location on file with NPPES is 801 N 29th St, Billings, MT 59101-0905.
- What is Chad Ryersee's phone number?
- The practice phone number listed in the NPPES registry for Chad Ryersee is (406) 238-2500.
- Does Chad Ryersee accept Medicare?
- Chad Ryersee is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chad Ryersee's NPI active?
- Yes — Chad Ryersee's NPI (1639939796) is active in the NPPES registry as of the last update on 2024-03-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.