Doctor profile · Federal record
Dr. Michael Mastromichalis, M.D.
Urology Physician (CMS: Urology) · Fenton, MO
- NPI 1346444700
- Accepts Medicare
- 21 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1011 Bowles Ave Ste 425
Fenton, MO 630262384
(636) 496-5030
fax (636) 496-5025 - Mailing address
-
Po Box 955534
Saint Louis, MO 631955534
Credentials & registration
- NPI registered
- June 2007 — 19 yrs on file
- Profile last updated
- November 5, 2020
- Year of graduation
- 2005 — 21 yrs since
- Specialty taxonomy
- 208800000X — NUCC code
- State license (1)
- Missouri #2008016598
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1346444700. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
966
Distinct HCPCS
10
Medicare allowed
$79,614
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 204 | 181 | $123 | |
81003 |
Automated urinalysis test | 163 | 139 | $2 | |
51798 |
Ultrasound measurement of bladder capacity after voiding | 131 | 109 | $10 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 60 | 57 | $87 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 51 | 51 | $126 | |
52442 |
Insertion of implant in urethra within prostate gland using an endoscope, each additional implant | 37 | 14 | $49 | |
52000 |
Diagnostic exam of bladder and urethra using an endoscope | 35 | 32 | $234 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 29 | 28 | $174 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 26 | 20 | $93 | |
51700 |
Simple bladder irrigation and/or instillation | 20 | 16 | $74 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 57. This provider delivers 17× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,797
Patients
752
Total drug cost
$111,577
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Tamsulosin Hcl | Generic | 560 | 217 | $13,488 |
| Finasteride | Generic | 255 | 100 | $3,483 |
| Solifenacin Succinate | Generic | 144 | 58 | $12,501 |
| Cephalexin | Generic | 134 | 107 | $750 |
| Oxybutynin Chloride Er (Oxybutynin Chloride) | Brand | 104 | 46 | $3,896 |
| Alfuzosin Hcl Er (Alfuzosin Hcl) | Brand | 78 | 26 | $1,936 |
| Methenamine Hippurate | Generic | 73 | 20 | $6,442 |
| Myrbetriq (Mirabegron) | Brand | 72 | 25 | $49,858 |
| Dutasteride | Generic | 65 | 19 | $1,880 |
| Desmopressin Acetate | Generic | 61 | 25 | $4,282 |
Hospital affiliations
Frequently asked questions
What is Dr. Michael Mastromichalis's medical specialty?
Dr. Michael Mastromichalis practices Urology Physician in Fenton, MO.
Where does Dr. Michael Mastromichalis practice?
Dr. Michael Mastromichalis practices at 1011 Bowles Ave Ste 425, Fenton, MO 630262384. Office phone: 6364965030.
What is Dr. Michael Mastromichalis's NPI?
Dr. Michael Mastromichalis's National Provider Identifier (NPI) is 1346444700, issued by NPPES.
Does Dr. Michael Mastromichalis accept Medicare assignment?
Yes. Dr. Michael Mastromichalis accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Michael Mastromichalis commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Automated urinalysis test (HCPCS 81003); Ultrasound measurement of bladder capacity after voiding (HCPCS 51798). Source: CMS Medicare Physician & Other Practitioners file.