Shirk PC
NPI 1558673442 · Chiropractor · Mason City, IA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Shirk PC is a Chiropractor organization in Mason City, IA (NPI 1558673442).
Provider details
- NPI number
- 1558673442
- Entity type
- Organization
- Primary specialty
- ChiropractorChiropractic Providers
- Organization subpart
- No
- Authorized official
- Gregory Shirk, President(641) 423-4455
- License
- A05882 (IA)
Specialties & taxonomies
Chiropractic Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 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
- Acute Care Chiropractic
Registry dates
- Enumerated
- 2010-07-08
- Last updated
- 2014-11-19
Frequently asked questions
- What is Shirk PC's NPI number?
- Shirk PC's National Provider Identifier (NPI) is 1558673442, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Shirk PC?
- Shirk PC is classified in the NPPES registry as Chiropractor (Chiropractic Providers).
- Where is Shirk PC located?
- Shirk PC's practice location on file with NPPES is 630 1st St Nw, Mason City, IA 50401-2947.
- What is Shirk PC's phone number?
- The practice phone number listed in the NPPES registry for Shirk PC is (641) 423-4455.
- Does Shirk PC accept Medicare?
- Shirk PC 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 Shirk PC?
- The authorized official listed on Shirk PC's NPPES record is Gregory Shirk, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Shirk PC's NPI active?
- Yes — Shirk PC's NPI (1558673442) is active in the NPPES registry as of the last update on 2014-11-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.