Doctor profile · Federal record
Dr. Mark Lassise, M.D.
Psychiatry Physician (CMS: Psychiatry) · Mason City, IA
- NPI 1023002508
- Accepts Medicare
- 46 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
250 S Crescent Dr Ste 10
Mason City, IA 504012926
(641) 494-5170
fax (641) 494-5175 - Mailing address
-
250 S Crescent Dr
Mason City, IA 504012926
Credentials & registration
- NPI registered
- September 2005 — 21 yrs on file
- Profile last updated
- July 6, 2020
- Year of graduation
- 1980 — 46 yrs since
- Specialty taxonomy
- 2084P0800X — NUCC code
- State license (1)
- Iowa #22919
- Medicaid
- IA #2223412
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1023002508. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
623
Distinct HCPCS
6
Medicare allowed
$53,387
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 265 | 117 | $91 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 157 | 67 | $91 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 91 | 58 | $62 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 85 | 69 | $62 | |
90792 |
Psychiatric diagnostic evaluation with medical services | 13 | 13 | $164 | |
90792 |
Psychiatric diagnostic evaluation with medical services | 12 | 12 | $164 |
In context: peer comparison
Among 2 peers in Mason City Psychiatry Physician, average services per provider: 133. This provider delivers 4.7× the peer median.Open Payments
Industry payments received
All-time total
$955
Transactions
54
Manufacturers
13
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 12 | $211.51 | |
| Teva Pharmaceuticals USA, INC. | 8 | $133.28 | |
| Iti, INC. (D/B/A Intra-Cellular Therapies, INC.) | 6 | $114.05 | |
| Axsome Therapeutics, INC. | 5 | $91.42 | |
| Janssen Pharmaceuticals, INC | 5 | $91.27 | |
| Lundbeck LLC | 4 | $81.60 | |
| Otsuka America Pharmaceutical, INC. | 4 | $66.02 | |
| Indivior INC. | 3 | $53.79 | |
| Neurocrine Biosciences, INC. | 2 | $32.65 | |
| Ironshore Pharmaceuticals INC. | 2 | $31.90 | |
| Corium, LLC | 1 | $17.32 | |
| E.R. Squibb & Sons, L.L.C. | 1 | $15.33 | |
| Alkermes, INC. | 1 | $14.53 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,607
Patients
351
Total drug cost
$84,223
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Quetiapine Fumarate | Generic | 339 | 34 | $8,675 |
| Buspirone Hcl | Generic | 300 | 34 | $4,047 |
| Trazodone Hcl | Generic | 253 | 40 | $3,290 |
| Venlafaxine Hcl ER (Venlafaxine Hcl) | Brand | 192 | 15 | $3,772 |
| Sertraline Hcl | Generic | 187 | 27 | $1,496 |
| Risperidone | Generic | 177 | 29 | $1,649 |
| Benztropine Mesylate | Generic | 171 | 26 | $2,460 |
| Lamotrigine | Generic | 166 | 23 | $1,893 |
| Aripiprazole | Generic | 162 | 24 | $19,292 |
| Escitalopram Oxalate | Generic | 144 | 25 | $2,230 |
Frequently asked questions
What is Dr. Mark Lassise's medical specialty?
Dr. Mark Lassise practices Psychiatry Physician in Mason City, IA.
Where does Dr. Mark Lassise practice?
Dr. Mark Lassise practices at 250 S Crescent Dr Ste 10, Mason City, IA 504012926. Office phone: 6414945170.
What is Dr. Mark Lassise's NPI?
Dr. Mark Lassise's National Provider Identifier (NPI) is 1023002508, issued by NPPES.
Does Dr. Mark Lassise accept Medicare assignment?
Yes. Dr. Mark Lassise accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Lassise commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.