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- 630 1St St Nw, Mason City, IA 50401
About Dr. Shirk
Gregory J. Shirk, DC is a healthcare provider in Mason City, IA specializing in chiropractic. Gregory trained at Palmer College Chiropractic - Davenport, graduating in 1995. Gregory is also listed as specializing in chiropractor. According to Medicare claims data, Gregory cared for 165 Medicare patients across 1,683 services. The services billed most often include chiropractic manipulative treatment, 3-4 spinal regions and chiropractic manipulative treatment, 1-2 spinal regions. This provider record is associated with NPI 1629064464.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (641) 423-4455
- Email not available
Practice Locations
630 1ST ST NW
Mason City, IA 50401
Conditions Supported and Services
Within Chiropractic generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Arm & Elbow
Chronic pain
Foot & ankle
Head & jaw
Head & Neck
Hip & Pelvis
Joints
Leg & Foot
Muscles
Nerve
Nerve issues
Pediatric
Pregnancy
Shoulder & Arm
Spine
Spine & disc
- Herniated disc
- Poor Posture
- Rib pain
- Sacroiliac joint pain
- Scoliosis
- Spinal stenosis
- Stiff neck
- Tailbone pain
- Upper Back Pain
Trauma
Procedures & services
Most searched procedures
Adjustment
- Extremity adjustment
- Gonstead Adjustment
- Sacro-Occipital Technique
- Spinal manipulation
- Upper Cervical Adjustment
Adjustments
Advanced Procedures
Devices & supports
Diagnostics
Pediatrics
Prenatal care
Recovery
Rehab & exercise
Soft Tissue
Specialized Care
Spine & disc
Spine Therapy
Therapy
- Active release technique
- Acupressure
- Craniosacral therapy
- Cupping Therapy
- Dry needling
- Electrical muscle stimulation
- Infrared Sauna Therapy
- Muscle Scraping
- Pulsed electromagnetic field therapy
- Red light therapy
- Shockwave Therapy
- Therapeutic Ultrasound
- Wart Removal
Wellness
Procedures Most Often Billed to Medicare
1,683 services · 165 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Chiropractic manipulative treatment, 3-4 spinal regions | Treatment | 98941 |
1,649 | More than most peers in Chiropractic |
| Chiropractic manipulative treatment, 1-2 spinal regions | Treatment | 98940 |
34 | Less often than most peers in Chiropractic |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 1
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other chiropractics in Mason City 8
Same specialty, same city.
Trained at Palmer College Chiropractic - Davenport 8
Other providers in the same specialty who trained at the same institution.
More connections — 15 related providers in 2 groups
Class of 1995 at Palmer College Chiropractic - Davenport 8
Providers who graduated from the same medical school in the same year.
Also performs Chiropractic manipulative treatment, 3-4 spinal regions 7
Providers in IA who bill this service to Medicare most often.
Common questions
What is Dr. Shirk's specialty?
Dr. Shirk is a chiropractic in Mason City, IA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Dr. Shirk?
Dr. Shirk is listed at 630 1St St Nw, Mason City, IA 50401. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Shirk?
The number on file is (641) 423-4455. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Shirk's NPI number?
Dr. Shirk's National Provider Identifier is 1629064464. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Shirk's medical education?
Dr. Shirk attended Palmer College Chiropractic - Davenport, graduating in 1995. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Shirk been practicing?
Dr. Shirk has 31 years experience. Calculated from a graduation year of 1995, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Shirk known for?
According to Medicare billing data, Dr. Shirk provides treatments such as chiropractic manipulative treatment, 3-4 spinal regions and chiropractic manipulative treatment, 1-2 spinal regions. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Shirk confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Shirk. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.