Mason City Ambulatory Surgery Center, LLC
NPI 1689251720 · Anesthesiology Physician · Mason City, IA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mason City Ambulatory Surgery Center, LLC is a Anesthesiology Physician organization in Mason City, IA (NPI 1689251720).
Provider details
- NPI number
- 1689251720
- Entity type
- Organization
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Kevin Rier, Medical Director(641) 494-2000
Specialties & taxonomies
Allopathic & Osteopathic Physicians
- Certified Registered Nurse Anesthetist367500000X
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
100% 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.
Practice location
Mailing address
Other names (DBA / former)
- Doing business as
- Mason City Surgery Center
- Doing business as
- Mason City Surgery Center
Registry dates
- Enumerated
- 2021-03-25
- Last updated
- 2025-04-02
- Certified
- 2025-04-02
Frequently asked questions
- What is Mason City Ambulatory Surgery Center, LLC's NPI number?
- Mason City Ambulatory Surgery Center, LLC's National Provider Identifier (NPI) is 1689251720, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mason City Ambulatory Surgery Center, LLC?
- Mason City Ambulatory Surgery Center, LLC is classified in the NPPES registry as Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Mason City Ambulatory Surgery Center, LLC located?
- Mason City Ambulatory Surgery Center, LLC's practice location on file with NPPES is 990 4th St Sw, Mason City, IA 50401-2861.
- What is Mason City Ambulatory Surgery Center, LLC's phone number?
- The practice phone number listed in the NPPES registry for Mason City Ambulatory Surgery Center, LLC is (641) 494-2000.
- Does Mason City Ambulatory Surgery Center, LLC accept Medicare?
- Mason City Ambulatory Surgery Center, LLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Mason City Ambulatory Surgery Center, LLC?
- The authorized official listed on Mason City Ambulatory Surgery Center, LLC's NPPES record is Kevin Rier, Medical Director. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mason City Ambulatory Surgery Center, LLC's NPI active?
- Yes — Mason City Ambulatory Surgery Center, LLC's NPI (1689251720) is active in the NPPES registry as of the last update on 2025-04-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.