Doctor profile · Federal record
Dr. Jan Prazak, MD
Gastroenterology Physician (CMS: Gastroenterology) · San Antonio, TX
- NPI 1649488222
- Accepts Medicare
- MIPS 79.9 / 100 · 2023
- 25 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
621 Camden Street, Suite 202
San Antonio, TX 782151639
(210) 253-3422
fax (210) 227-9833
Credentials & registration
- NPI registered
- May 2007 — 19 yrs on file
- Profile last updated
- November 14, 2013
- Year of graduation
- 2001 — 25 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Michigan #4301079500
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1649488222. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
965
Distinct HCPCS
10
Medicare allowed
$85,718
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99439 |
Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month | 301 | 35 | $45 | |
99490 |
Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 174 | 35 | $60 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 98 | 83 | $122 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 71 | 69 | $69 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 59 | 54 | $86 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 51 | 50 | $171 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 35 | 35 | $125 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 29 | 23 | $76 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 27 | 27 | $155 | |
43259 |
Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 20 | 20 | $191 |
In context: peer comparison
Among 38 peers in San Antonio Gastroenterology Physician, average services per provider: 78. This provider delivers 12× the peer median.Open Payments
Industry payments received
All-time total
$768
Transactions
36
Manufacturers
12
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Boston Scientific Corporation | 9 | $239.72 | |
| Genzyme Corporation | 5 | $109.05 | |
| Janssen Biotech, INC. | 5 | $84.23 | |
| Aimmune Therapeutics, INC. | 4 | $62.56 | |
| Ironwood Pharmaceuticals, INC | 2 | $60.95 | |
| Abbvie INC. | 3 | $54.24 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | 2 | $41.71 | |
| Takeda Pharmaceuticals U.S.A., INC. | 2 | $37.98 | |
| Lilly USA, LLC | 1 | $31.51 | |
| Ardelyx, INC. | 1 | $16.65 | |
| Intercept Pharmaceuticals, INC. | 1 | $15.35 | |
| Ipsen Biopharmaceuticals, INC | 1 | $14.02 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,222
Patients
767
Total drug cost
$143,023
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 310 | 304 | $5,353 |
| Omeprazole | Generic | 230 | 96 | $4,596 |
| Pantoprazole Sodium | Generic | 100 | 41 | $2,171 |
| Linzess (Linaclotide) | Brand | 98 | 31 | $82,800 |
| Peg-3350 and Electrolytes (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 77 | 77 | $1,501 |
| Plenvu (Peg3350/Sod Sul/Nacl/Kcl/Asb/C) | Brand | 68 | 65 | $9,549 |
| Famotidine | Generic | 56 | 18 | $1,347 |
| Clenpiq (Sod Picosulf/Mag Ox/Citric Ac) | Brand | 51 | 50 | $8,470 |
| Sutab (Sod Sulf/Pot Chloride/Mag Sulf) | Brand | 47 | 45 | $7,973 |
| Dicyclomine Hcl | Generic | 44 | 26 | $607 |
Hospital affiliations
Frequently asked questions
What is Dr. Jan Prazak's medical specialty?
Dr. Jan Prazak practices Gastroenterology Physician in San Antonio, TX.
Where does Dr. Jan Prazak practice?
Dr. Jan Prazak practices at 621 Camden Street, San Antonio, TX 782151639. Office phone: 2102533422.
What is Dr. Jan Prazak's NPI?
Dr. Jan Prazak's National Provider Identifier (NPI) is 1649488222, issued by NPPES.
Does Dr. Jan Prazak accept Medicare assignment?
Yes. Dr. Jan Prazak accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Jan Prazak commonly perform?
Top Medicare-reported procedures in 2023: Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month (HCPCS 99439); Chronic care management services (HCPCS 99490); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.