Are you Mark E. Lassise, M.D.? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 250 S Crescent Dr Ste 10, Mason City, IA 50401
About Dr. Lassise
Mark E. Lassise, M.D. is a healthcare provider in Mason City, IA specializing in psychiatry. Mark trained at University of Colorado School of Medicine, Denver, graduating in 1980. According to Medicare claims data, Mark cared for 202 Medicare patients across 522 services. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more. This provider record is associated with NPI 1023002508.
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) 494-5170
- Email not available
Practice Locations
250 S CRESCENT DR STE 10
Mason City, IA 50401
Conditions Commonly Evaluated or Treated
Within Psychiatry 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
Anxiety, trauma, and obsessive-compulsive
Mood disorders
Psychotic disorders
Substance-related and addictive
Addiction & Substance Use
Cognitive and adjustment
- Dementia with behavioral symptoms
- Prolonged grief disorder
Eating Disorders
Eating, sleep, and somatic
Mood & Depression
Neurodevelopmental and behavioral
Personality and dissociative
- Borderline personality disorder
- Dissociative disorders
- Narcissistic personality disorder
Sleep & Wakefulness
Procedures & services
Most searched procedures
- Anxiety and depression treatment
- Cognitive behavioral therapy
- Medication management
- Psychiatric evaluation
- Telepsychiatry
Assessment
- Suicide and safety risk assessment
Addiction care
Addiction Medicine
- Alcohol Detox and Withdrawal Management
- Dual Diagnosis Treatment
- Suboxone Treatment and MAT
Assessments
- Adult ADHD Testing
- Autism testing
- Cognitive Assessment
Brain stimulation
- Neurofeedback
- Vagus Nerve Stimulation
Consultations
- Psychiatric Second Opinion
Diagnostics
- Neuropsychological Testing
- Psychiatric Genetic Testing
Inpatient care
- Inpatient Psychiatric Care
Interventional psychiatry
- Spravato Treatment
Psychotherapy
- Anger Management Counseling
- Couples counseling
- EMDR Therapy
- Exposure and Response Prevention
Sleep Medicine
Specialized care
Therapy
Therapy and care
- Family therapy
- Group psychotherapy
- Supportive psychotherapy
Procedures Most Often Billed to Medicare
522 services · 202 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Psychiatric diagnostic evaluation with medical services | Treatment | 90792 |
12 | Less often than most peers in Psychiatry |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
403 | More than most peers in Psychiatry |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
52 | Less often than most peers in Psychiatry |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
42 | More than most peers in Psychiatry |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
13 | As often as other peers in Psychiatry |
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.
Other psychiatrists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 27 related providers in 4 groups
Other psychiatrists in Mason City 4
Same specialty, same city.
Trained at University of Colorado School of Medicine, Denver 8
Other providers in the same specialty who trained at the same institution.
Class of 1980 at University of Colorado School of Medicine, Denver 8
Providers who graduated from the same medical school in the same year.
Also performs Psychiatric diagnostic evaluation with medical services 7
Providers in IA who bill this service to Medicare most often.
Common questions
What is Mark E. Lassise's specialty?
Mark E. Lassise is a psychiatrist in Mason City, IA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Psychiatry”.
NPI registry
Where can I find Mark E. Lassise?
Mark E. Lassise is listed at 250 S Crescent Dr Ste 10, 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 Mark E. Lassise?
The number on file is (641) 494-5170. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Mark E. Lassise's NPI number?
Mark E. Lassise's National Provider Identifier is 1023002508. 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 Mark E. Lassise's education?
Mark E. Lassise attended University of Colorado School of Medicine, Denver, graduating in 1980. This comes from the CMS National Downloadable File.
CMS public data
How long has Mark E. Lassise been practicing?
Mark E. Lassise has 46 years experience. Calculated from a graduation year of 1980, reported in the CMS National Downloadable File.
CMS public data
What is Mark E. Lassise known for?
According to Medicare billing data, Mark E. Lassise provides treatments such as psychiatric diagnostic evaluation with medical services, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Mark E. Lassise confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Mark E. Lassise. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.