Doctor profile · Federal record
Dr. John Flack, MD, MPH
Hypertension Specialist Physician (CMS: Internal Medicine) · Internal Medicine Physician · Springfield, IL
- NPI 1164450987
- Accepts Medicare
- 44 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
751 N Rutledge St, Suite 1100
Springfield, IL 627024968
(217) 545-8000
fax (217) 545-4735 - Mailing address
-
Po Box 19636
Springfield, IL 627949636
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- October 21, 2020
- Year of graduation
- 1982 — 44 yrs since
- Specialty taxonomy
- 207RH0005X — NUCC code
- State license (1)
- Illinois #036-138254
- Medicaid
- IL #036138254
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1164450987. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
31
Distinct HCPCS
1
Medicare allowed
$3,760
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 31 | 24 | $121 |
In context: peer comparison
Among 1 peers in Springfield Hypertension Specialist Physician, average services per provider: 31. This provider delivers 1.0× the peer median.Open Payments
Industry payments received
All-time total
$61,684
Transactions
26
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| AstraZeneca Pharmaceuticals Lp | 24 | $59,065.15 | |
| Idorsia Pharmaceuticals US INC | 1 | $2,520.00 | |
| Recor Medical INC | 1 | $98.99 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,117
Patients
285
Total drug cost
$86,685
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Amlodipine Besylate | Generic | 149 | 46 | $1,126 |
| Chlorthalidone | Generic | 146 | 47 | $3,379 |
| Allopurinol | Generic | 137 | 36 | $1,134 |
| Indapamide | Generic | 124 | 30 | $2,255 |
| Olmesartan Medoxomil | Generic | 124 | 40 | $4,962 |
| Entresto (Sacubitril/Valsartan) | Brand | 87 | 0 | $68,304 |
| Spironolactone | Generic | 77 | 20 | $720 |
| Metoprolol Succinate | Generic | 51 | 17 | $688 |
| Isosorbide Mononitrate ER (Isosorbide Mononitrate) | Brand | 48 | 11 | $1,277 |
| Atorvastatin Calcium | Generic | 36 | 14 | $408 |
Hospital affiliations
Frequently asked questions
What is Dr. John Flack's medical specialty?
Dr. John Flack practices Hypertension Specialist Physician in Springfield, IL.
Where does Dr. John Flack practice?
Dr. John Flack practices at 751 N Rutledge St, Springfield, IL 627024968. Office phone: 2175458000.
What is Dr. John Flack's NPI?
Dr. John Flack's National Provider Identifier (NPI) is 1164450987, issued by NPPES.
Does Dr. John Flack accept Medicare assignment?
Yes. Dr. John Flack accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Flack commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.